10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

ý Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the quarterly period ended March 30, 2013

or

¨ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Commission File Number 001-14423

PLEXUS CORP.

(Exact name of registrant as specified in charter)

Wisconsin	39-1344447
(State of Incorporation)	(IRS Employer Identification No.)

One Plexus Way

Neenah, Wisconsin 54956

(Address of principal executive offices)(Zip Code)

Telephone Number (920) 969-6000

(Registrant’s telephone number, including Area Code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ý    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  ý    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	ý	Accelerated filer	¨
Non-accelerated filer	¨  (Do not check if a smaller reporting company)	Smaller reporting company	¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  ý

As of April 29, 2013, there were 34,102,634 shares of Common Stock of the Company outstanding.

PLEXUS CORP.

TABLE OF CONTENTS

March 30, 2013

PART I. FINANCIAL INFORMATION	3
ITEM 1. FINANCIAL STATEMENTS	3
Condensed Consolidated Statements of Comprehensive Income	3
Condensed Consolidated Balance Sheets	4
Condensed Consolidated Statements of Cash Flows	5
Notes to Condensed Consolidated Financial Statements	6
ITEM  2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS	15
“Safe Harbor” Cautionary Statement	15
Overview	15
Results of Operations	16
Reportable Segments	19
Liquidity and Capital Resources	20
Contractual Obligations, Commitments and Off-Balance Sheet Obligations	22
Disclosure About Critical Accounting Policies	23
New Accounting Pronouncements	23
ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK	24
ITEM 4. CONTROLS AND PROCEDURES	25
PART II. OTHER INFORMATION	26
ITEM 1A. Risk Factors	26
ITEM 2. Unregistered Sales of Equity Securities and Use Of Proceeds	26
ITEM 6. Exhibits	27
SIGNATURES	28

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PART I.     FINANCIAL INFORMATION

ITEM 1.    FINANCIAL STATEMENTS

PLEXUS CORP. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(in thousands, except per share data)

Unaudited

	Three Months Ended						Six Months Ended
	March 30, 2013			March 31, 2012			March 30, 2013			March 31, 2012
Net sales	$	557,824		$	573,470		$	1,088,356		$	1,103,124
Cost of sales	505,803			518,846			985,173			996,848
Gross profit	52,021			54,624			103,183			106,276
Selling and administrative expenses	28,833			28,856			58,511			56,746
Operating income	23,188			25,768			44,672			49,530
Other income (expense):
Interest expense	(3,640		)	(4,020		)	(7,360		)	(8,080		)
Interest income	383			415			780			898
Miscellaneous	—			228			(475		)	(317		)
Income before income taxes	19,931			22,391			37,617			42,031
Income tax expense	1,956			2,433			3,026			4,203
Net income	$	17,975		$	19,958		$	34,591		$	37,828
Earnings per share:
Basic	$	0.52		$	0.57		$	1.01		$	1.09
Diluted	$	0.52		$	0.56		$	1.00		$	1.07
Weighted average shares outstanding:
Basic	34,286			34,874			34,253			34,737
Diluted	34,694			35,658			34,673			35,431
Comprehensive income:
Net income	$	17,975		$	19,958		$	34,591		$	37,828
Derivative instrument fair market value adjustment—net of income tax	1,234			2,065			723			3,659
Foreign currency translation adjustments	(2,035		)	342			590			1,177
Comprehensive income	$	17,174		$	22,365		$	35,904		$	42,664

See notes to condensed consolidated financial statements.

3

PLEXUS CORP. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except per share data)

Unaudited

	March 30, 2013			September 29, 2012
ASSETS
Current assets:
Cash and cash equivalents	$	276,507		$	297,619
Accounts receivable, net of allowances of $1,156 and $1,011, respectively	335,279			323,210
Inventories	484,327			457,691
Deferred income taxes	2,246			2,232
Prepaid expenses and other	22,199			15,785
Total current assets	1,120,558			1,096,537
Property, plant and equipment, net	295,138			265,191
Deferred income taxes	3,771			4,335
Other	41,609			42,136
Total assets	$	1,461,076		$	1,408,199
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current liabilities:
Current portion of long-term debt and capital lease obligations	$	2,893		$	10,211
Accounts payable	337,694			341,276
Customer deposits	96,778			36,384
Accrued liabilities:
Salaries and wages	34,646			45,450
Other	43,163			46,550
Total current liabilities	515,174			479,871
Long-term debt and capital lease obligations, net of current portion	258,789			260,211
Other liabilities	18,066			19,095
Total non-current liabilities	276,855			279,306
Commitments and contingencies (Note 13)
Shareholders’ equity:
Preferred stock, $.01 par value, 5,000 shares authorized, none issued or outstanding	—			—
Common stock, $.01 par value, 200,000 shares authorized, 48,944 and 48,851 shares issued, respectively, and 34,313 and 35,097 shares outstanding, respectively	489			489
Additional paid-in capital	441,208			435,546
Common stock held in treasury, at cost, 14,631 and 13,754 shares, respectively	(421,651		)	(400,110		)
Retained earnings	631,504			596,913
Accumulated other comprehensive income	17,497			16,184
Total shareholders’ equity	669,047			649,022
Total liabilities and shareholders’ equity	$	1,461,076		$	1,408,199

See notes to condensed consolidated financial statements.

4

PLEXUS CORP. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

Unaudited

	Six Months Ended
	March 30, 2013			March 31, 2012
Cash flows from operating activities
Net income	$	34,591		$	37,828
Adjustments to reconcile net income to cash flows from operating activities:
Depreciation	23,819			24,375
Amortization of intangibles	1,033			346
Gain on sale of property, plant and equipment	(180		)	(114		)
Deferred income taxes	184			1,598
Stock based compensation expense	5,896			6,384
Changes in operating assets and liabilities, excluding effects of acquisition:
Accounts receivable	(12,241		)	(10,583		)
Inventories	(27,192		)	(10,046		)
Prepaid expenses and other	(6,947		)	(4,471		)
Accounts payable	(4,470		)	49,637
Customer deposits	60,555			2,953
Accrued liabilities and other	(12,121		)	(15,951		)
Cash flows provided by operating activities	62,927			81,956
Cash flows from investing activities
Payments for property, plant and equipment	(53,301		)	(32,900		)
Proceeds from sales of property, plant and equipment	203			502
Sale of long-term investments	—			2,000
Payments for business acquisition, net of cash acquired	—			(35,246		)
Cash flows used in investing activities	(53,098		)	(65,644		)
Cash flows from financing activities
Payments on debt and capital lease obligations	(8,816		)	(8,630		)
Purchases of common stock	(21,541		)	—
Proceeds from exercise of stock options	116			5,958
Minimum tax withholding related to vesting of restricted stock	(350		)	(310		)
Income tax benefit of stock option exercises	—			1,718
Cash flows used in financing activities	(30,591		)	(1,264		)
Effect of exchange rate changes on cash and cash equivalents	(350		)	599
Net (decrease) increase in cash and cash equivalents	(21,112		)	15,647
Cash and cash equivalents:
Beginning of period	297,619			242,107
End of period	$	276,507		$	257,754

See notes to condensed consolidated financial statements.

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PLEXUS CORP. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

FOR THE THREE AND SIX MONTHS ENDED MARCH 30, 2013 AND MARCH 31, 2012

Unaudited

NOTE 1—BASIS OF PRESENTATION AND ACCOUNTING POLICIES

Basis of Presentation

The accompanying condensed consolidated financial statements included herein have been prepared by Plexus Corp. and its subsidiaries (together “Plexus,” the “Company,” or “we”) without audit and pursuant to the rules and regulations of the United States (“U.S.”) Securities and Exchange Commission (“SEC”). In the opinion of the Company, the accompanying condensed consolidated financial statements reflect all adjustments, which include normal recurring adjustments necessary for the fair statement of the consolidated financial position of the Company as of March 30, 2013 and September 29, 2012, and the results of operations for the three and six months endedMarch 30, 2013 and March 31, 2012, and the cash flows for the same six month periods.

Certain information and footnote disclosures, normally included in financial statements prepared in accordance with generally accepted accounting principles, have been condensed or omitted pursuant to the SEC’s rules and regulations dealing with interim financial statements. However, the Company believes that the disclosures made in the condensed consolidated financial statements included herein are adequate to make the information presented not misleading. It is suggested that these condensed consolidated financial statements be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s 2012 Annual Report on Form 10-K.

The Company’s reportable segments consist of the “Americas” (“AMER”) segment, “Asia-Pacific” (“APAC”) segment and “Europe, Middle East, and Africa” (“EMEA”) segment. Refer to Note 10, "Business Segments," for further details on reportable segments.

Cash and Cash Equivalents

Cash and cash equivalents include highly liquid investments with original maturities of three months or less at the time of purchase and are classified as Level 1 in the fair level hierarchy described below.

Fair Value of Financial Instruments

The Company holds financial instruments consisting of cash and cash equivalents, accounts receivable, accounts payable, debt, derivatives, and capital lease obligations. The carrying values of cash and cash equivalents, accounts receivable, accounts payable, derivatives, and capital lease obligations as reported in the condensed consolidated financial statements approximate fair value. Accounts receivable were reflected at net realizable value based on anticipated losses due to potentially uncollectible balances. Anticipated losses were based on management’s analysis of historical losses and changes in customers’ credit status. The fair value of the Company’s long-term debt was $245.3 million and $256.8 million as of March 30, 2013 and September 29, 2012, respectively. The carrying value of the Company’s long-term debt was $250.0 million and $257.5 million for the periods ended March 30, 2013 and September 29, 2012, respectively. The Company uses quoted market prices when available or discounted cash flows to calculate the fair value of its debt. If measured at fair value in the financial statements, long-term debt (including the current portion) would be classified as Level 2 in the fair value hierarchy described below. Refer to Note 6, "Derivatives and Fair Value Measurements," for further details on derivatives.

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (or exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. The accounting guidance establishes a fair value hierarchy based on three levels of inputs that may be used to measure fair value. The input levels are:

Level 1: Quoted (observable) market prices in active markets for identical assets or liabilities.

Level 2: Inputs other than Level 1 that are observable, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the asset or liability.

Level 3: Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the asset or liability.

Reclassifications

6

Certain amounts in prior year periods within financing activities on the Consolidated Statements of Cash Flows were reclassified to conform to the current year presentation.

NOTE 2—BUSINESS COMBINATION

In January 2012, Plexus and Kontron AG (“Kontron”) entered into a strategic manufacturing arrangement, and completed the related asset purchase transaction described below. Under this arrangement, Kontron transitioned all manufacturing of its Kontron Design Manufacturing Services (M) Sdn. Bhd. subsidiary (“KDMS”) located in Penang, Malaysia to Plexus facilities in Penang. Plexus acquired the inventory and equipment of KDMS for an adjusted purchase price of $34.2 million, reflecting certain post-closing adjustments, which was paid with cash on-hand, and hired substantially all of KDMS's employees. No real estate was included in this transaction. This transaction has been accounted for as a business combination. The purchase price was allocated primarily to inventory and equipment. An identifiable intangible asset of $4.0 million related to a customer relationship was recorded within other non-current assets in the Company's accompanying Condensed Consolidated Balance Sheets as a result of the arrangement and is being amortized on a straight-line basis over a two year period. Under this arrangement, Kontron also committed to approximately $100 million of incremental revenue annually for two years. Assuming this transaction had been made at the beginning of fiscal 2012, the consolidated pro forma results would not be materially different from reported results.

NOTE 3—INVENTORIES

Inventories are stated at the lower of cost (on a first-in, first-out basis) or market value. The stated cost is comprised of direct materials, labor, and overhead. The major classes of inventories, net of applicable lower of cost or market write-downs, were as follows (in thousands):

	March 30, 2013		September 29, 2012
Raw materials	$	351,988	$	337,657
Work-in-process	56,097		47,182
Finished goods	76,242		72,852
	$	484,327	$	457,691

Per contractual terms, customer deposits are received by the Company to offset obsolete and excess inventory risks. The total amount of customer deposits related to inventory and included within current liabilities on the accompanying Condensed Consolidated Balance Sheets as of March 30, 2013 and September 29, 2012 was $52.7 million and $34.8 million, respectively. Approximately $18.1 million of the inventory customer deposit balance as of March 30, 2013 relates to the previously disclosed disengagement of Juniper Networks, Inc. ("Juniper").

NOTE 4—PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment consisted of the following categories (in thousands):

	March 30, 2013		September 29, 2012
Land, buildings and improvements	$	186,761	$	170,557
Machinery and equipment	305,920		295,548
Computer hardware and software	89,764		85,433
Construction in progress	58,701		39,894
	641,146		591,432
Less: accumulated depreciation	346,008		326,241
	$	295,138	$	265,191

NOTE 5—DEBT

On May 15, 2012, the Company entered into a five-year, $250 million senior unsecured credit facility that terminates on May 15, 2017 (the “Credit Facility”). The Credit Facility includes a $160 million revolving credit facility and a $90 million term loan. The revolving credit facility may be increased by $100 million (the "increase option") to $260 million generally by mutual agreement of the Company, the lenders, the letter of credit issuers and the administrative agent named in the related

7

credit agreement (the "Credit Agreement"), subject to certain customary conditions. The Credit Facility was used to refinance the Company's then-existing $100 million senior unsecured revolving credit facility (no amounts were outstanding at that time) and its $150 million senior unsecured term loan (balance of $90.0 million as of May 15, 2012), both of which were scheduled to mature on April 4, 2013 (the “Prior Credit Facility”), and for general corporate purposes. Quarterly principal repayments of the Credit Facility term loan of $3.75 million per quarter began on June 29, 2012 and ended on March 28, 2013. The final $75 million payment is due on May 15, 2017. As of March 30, 2013, the Company had term loan borrowings of $75 million outstanding and no revolving borrowings under the Credit Facility.

The financial covenants (as defined under the Credit Facility) require that the Company maintain, as of each fiscal quarter end, a maximum total leverage ratio and a minimum interest coverage ratio. As of March 30, 2013, the Company was in compliance with all covenants of the Credit Facility. Borrowings under the Credit Facility, at the Company's option, bear interest at a defined base rate or the LIBOR rate plus, in each case, an applicable margin based upon the Company's leverage ratio as defined in the Credit Agreement. Rates would increase upon negative changes in specified Company financial metrics and would decrease upon reduction in the current total leverage ratio to no less than LIBOR plus 1.00% or base rate plus 0%. As of March 30, 2013, the Company had a borrowing rate of LIBOR plus 1.13%. The Company is also required to pay an annual commitment fee on the unused revolver credit commitment based on the Company's leverage ratio; the fee was 0.2% as of March 30, 2013.

In the second quarter of fiscal 2012, the Company incurred approximately $0.9 million in new debt issuance costs in connection with the new Credit Facility, which are being amortized over the five-year term of the Credit Facility.

The Company also has outstanding 5.20% Senior Notes, due on June 15, 2018 (the “Notes”); $175 million principal of the Notes was outstanding as of both March 30, 2013 and September 29, 2012.

NOTE 6—DERIVATIVES AND FAIR VALUE MEASUREMENTS

All derivatives are recognized in the accompanying Condensed Consolidated Balance Sheets at their estimated fair value. The Company currently has cash flow hedges related to variable rate debt and foreign currency obligations. The Company does not enter into derivatives for speculative purposes. Changes in the fair value of the derivatives that qualify as cash flow hedges are recorded in “Accumulated other comprehensive income” in the accompanying Condensed Consolidated Balance Sheets until earnings are affected by the variability of the cash flows.

The Company’s Malaysian operations have entered into forward exchange contracts on a rolling basis with a total notional value of $49.5 million as of March 30, 2013. These forward contracts fix the exchange rates on foreign currency cash used to pay a portion of local currency expenses. The total fair value of these forward contracts was a $0.4 millionasset as of March 30, 2013, and a $1.1 millionasset as of September 29, 2012.

The Company entered into three interest rate swap contracts related to the term loans under its Prior Credit Facility that had an initial total notional value of $150 million and matures on April 4, 2013. These interest rate swap contracts continued into the Credit Facility and pay the Company variable interest at the three month LIBOR rate, and the Company pays the counterparties a fixed interest rate. The fixed interest rates for each of these contracts are 4.415%, 4.490% and 4.435%, respectively. These interest rate swap contracts were originally entered into to convert $150 million of the variable rate term loan under the Prior Credit Facility into fixed rate debt. Based on the terms of the interest rate swap contracts and the underlying debt, these interest rate contracts were determined to be effective, and thus qualify as a cash flow hedge. As such, any changes in the fair value of these interest rate swaps are recorded in “Accumulated other comprehensive income” on the accompanying Condensed Consolidated Balance Sheets until earnings are affected by the variability of cash flows. The total fair value of these interest rate swap contracts was a $0.1 millionliability as of March 30, 2013and a $1.7 million liability as of September 29, 2012. As of March 30, 2013,the total remaining combined notional amount of the Company’s three interest rate swaps was $75.0 million.

The tables below present information regarding the fair values of derivative instruments (as defined in Note 1, "Basis of Presentation and Accounting Policies") and the effects of derivative instruments on the Company’s Condensed Consolidated Financial Statements:

8

Fair Values of Derivative Instruments
In thousands of dollars
	Asset Derivatives					Liability Derivatives
		March 30, 2013		September 29, 2012			March 30, 2013		September 29, 2012
Derivatives designated as hedging instruments	Balance Sheet Location	Fair Value		Fair Value		Balance Sheet Location	Fair Value		Fair Value
Interest rate swaps		$	—	$	—	Current liabilities – Other	$	62	$	1,715
Forward contracts	Prepaid expenses and other	$	358	$	1,095		$	—	$	—

The Effect of Derivative Instruments on the Condensed Statements of Comprehensive Income
for the Three Months Ended
In thousands of dollars
Derivatives in Cash Flow Hedging Relationships	Amount of Gain or (Loss) Recognized in Other Comprehensive Income (“OCI”) on Derivative (Effective Portion)						Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)						Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)
	March 30, 2013			March 31, 2012				March 30, 2013			March 31, 2012				March 30, 2013		March 31, 2012
Interest rate swaps	$	1,610		$	(189	)	Interest income (expense)	$	(62	)	$	(903	)	Other income (expense)	$	—	$	—
Forward contracts	$	(177	)	$	1,772		Selling and administrative expenses	$	179		$	63		Other income (expense)	$	—	$	—
Treasury Rate Locks	$	—		$	—		Interest income (expense)	$	81		$	81		Other income (expense)	$	—	$	—

The Effect of Derivative Instruments on the Condensed Statements of Comprehensive Income
for the Six Months Ended
In thousands of dollars
Derivatives in Cash Flow Hedging Relationships	Amount of Gain or (Loss) Recognized in Other Comprehensive Income  (“OCI”) on Derivative (Effective Portion)					Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)						Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	Amount of Gain or (Loss) Recognized in Income on  Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)
	March 30, 2013			March 31, 2012			March 30, 2013			March 31, 2012				March 30, 2013		March 31, 2012
Interest rate swaps	$	805		$	15	Interest income (expense)	$	(848	)	$	(1,818	)	Other income (expense)	$	—	$	—
Forward contracts	$	(98	)	$	2,392	Selling and administrative expenses	$	672		$	(304	)	Other income (expense)	$	—	$	—
Treasury Rate Locks	$	—		$	—	Interest income (expense)	$	160		$	160		Other income (expense)	$	—	$	—

During fiscal 2011, the Company entered into treasury rate lock hedge contracts to hedge the variability of the fixed interest rate on

its issuance of $175 million of fixed rate debt using a treasury lock transaction. During the third quarter of fiscal 2011, when the fixed interest rate for the debt issuance was determined, all three treasury rate lock contracts were settled and the Company received proceeds of $2.3 million, which is being amortized over the seven year term of the related debt.

9

The following table lists the fair values of assets/(liabilities) of the Company’s derivatives as of March 30, 2013, by input level as defined above (in thousands):

Derivatives	Level 1		Level 2			Level 3		Total
Interest rate swaps	$	—	$	(62	)	$	—	$	(62	)
Foreign currency forward contracts	$	—	$	358		$	—	$	358

The fair value of interest rate swaps and foreign currency forward contracts is determined using a market approach which includes obtaining directly or indirectly observable values from third parties active in the relevant markets. The primary input in the fair value of the interest rate swaps is the relevant LIBOR forward curve. Inputs in the fair value of the foreign currency forward contracts include prevailing forward and spot prices for currency and interest rate forward curves.

NOTE 7—EARNINGS PER SHARE

The following is a reconciliation of the amounts utilized in the computation of basic and diluted earnings per share (in thousands, except per share amounts):

	Three Months Ended				Six Months Ended
	March 30, 2013		March 31, 2012		March 30, 2013		March 31, 2012
Basic and Diluted Earnings Per Share:
Net income	$	17,975	$	19,958	$	34,591	$	37,828
Basic weighted average common shares outstanding	34,286		34,874		34,253		34,737
Dilutive effect of share-based awards outstanding	408		784		420		694
Diluted weighted average shares outstanding	34,694		35,658		34,673		35,431
Earnings per share:
Basic	$	0.52	$	0.57	$	1.01	$	1.09
Diluted	$	0.52	$	0.56	$	1.00	$	1.07

For both the three and six months endedMarch 30, 2013, stock options and stock-settled stock appreciation rights ("SARS") for approximately 2.3 million shares were not included in the computation of diluted earnings per share because the options’ and stock-settled SARs’ exercise prices were greater than the average market price of the Company's common shares and, therefore, their effect would be anti-dilutive.

For the three and six months endedMarch 31, 2012, stock options and stock-settled stock appreciation rights for approximately 1.0 million and 1.2 million shares, respectively, were not included in the computation of diluted earnings per share because the options' and stock-settled SARs' exercise prices were greater than the average market price of the Company's common shares and, therefore, their effect would be anti-dilutive.

As a result of the Company's stock repurchase program, there were fewer shares outstanding for the three and six month periods ended March 30, 2013 as compared to the three and six month periods ended March 31, 2012. Refer to Note 14, "Shareholders' Equity" for further information on our stock repurchase program.

NOTE 8—STOCK-BASED COMPENSATION

The Company recognized $3.1 million and $5.9 million of compensation expense associated with stock-based awards for the three and six months endedMarch 30, 2013, respectively, and $3.7 million and $6.4 million for the three and six months endedMarch 31, 2012, respectively.

The Company continues to use the Black-Scholes valuation model to determine the fair value of stock options and stock-settled SARs. The Company uses the fair value at the date of grant to value restricted stock units ("RSUs") and unrestricted stock awards. The Company recognizes stock-based compensation expense over the stock-based awards’ vesting period.

NOTE 9—INCOME TAXES

Income tax expense for the three and six months endedMarch 30, 2013 was $2.0 million and $3.0 million, respectively. The effective tax rates for the three and six months endedMarch 30, 2013 were 9.8 percent and 8.0 percent, respectively. The

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increase in the effective tax rate for the quarter, compared to current year-to-date, was the result of an assessment from the Internal Revenue Service ("IRS") resulting from an audit of fiscal 2008 through 2010. The decrease in the effective tax rate for the three and six months ended March 30, 2013, as compared to 10.9 percent and 10.0 percent, for the three and six months endedMarch 31, 2012, respectively, was primarily due to an increase in income in the APAC segment, which benefits from reduced taxes due to tax holidays. Also, as demonstrated in recent quarters, the tax rate can vary during the year based on the mix of forecasted earnings by tax jurisdiction.

As of March 30, 2013, there was no material change in the amount of unrecognized tax benefits recorded for uncertain tax positions as compared to fiscal 2012 year end. The Company recognizes accrued interest and penalties related to uncertain tax positions in income tax expense. The amount of interest and penalties recorded for both the three and six months endedMarch 30, 2013 and March 31, 2012 was not material.

It is reasonably possible that a number of uncertain tax positions may be settled within the next 12 months. The Company is currently under examination by taxing authorities in the U.S.; however, the Company is not currently undergoing any tax examinations in any of the foreign jurisdictions in which the Company has significant operations.

The Company maintains valuation allowances when it is more likely than not that all or a portion of a deferred tax asset will not be realized. During the three and six months endedMarch 30, 2013, the Company continued to record a full valuation allowance against its net deferred tax assets in the U.S., Germany and Romania and at a certain entity in the United Kingdom, as it is more likely than not that these assets will not be fully realized based primarily on historical performance. The Company will continue to provide a valuation allowance against its net deferred tax assets in each of the applicable jurisdictions going forward until the need for a valuation allowance is eliminated. The need for a valuation allowance will be eliminated when the Company determines it is more likely than not that the deferred tax assets will be realized.

NOTE 10—BUSINESS SEGMENTS

Reportable segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker, or group, in assessing performance and allocating resources.

The Company uses an internal management reporting system, which provides important financial data to evaluate performance and allocate the Company’s resources on a regional basis. Net sales for segments are attributed to the region in which the product is manufactured or service is performed. The services provided, manufacturing processes used, class of customers serviced and order fulfillment processes used are similar and generally interchangeable across the segments. A segment’s performance is evaluated based upon its operating income (loss). A segment’s operating income (loss) includes its net sales less cost of sales and selling and administrative expenses, but excludes corporate and other costs, interest expense, other income (loss), and income taxes. Corporate and other costs primarily represent corporate selling and administrative expenses, and restructuring and impairment costs, if any. These costs are not allocated to the segments, as management excludes such costs when assessing the performance of the segments. Inter-segment transactions are generally recorded at amounts that approximate arm’s length transactions. The accounting policies for the regions are the same as for the Company taken as a whole.

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Information about the Company’s three reportable segments for the three and six months endedMarch 30, 2013 and March 31, 2012, respectively, follows (in thousands):

	Three Months Ended						Six Months Ended
	March 30, 2013			March 31, 2012			March 30, 2013			March 31, 2012
Net sales:
AMER	$	259,857		$	331,706		$	518,881		$	652,559
APAC	288,269			261,557			560,698			496,263
EMEA	34,942			27,809			63,112			47,271
Elimination of inter-segment sales	(25,244		)	(47,602		)	(54,335		)	(92,969		)
	$	557,824		$	573,470		$	1,088,356		$	1,103,124
Operating income (loss):
AMER	$	16,496		$	26,234		$	35,774		$	49,267
APAC	26,906			21,837			52,106			44,794
EMEA	835			290			613			(600		)
Corporate and other costs	(21,049		)	(22,593		)	(43,821		)	(43,931		)
	$	23,188		$	25,768		$	44,672		$	49,530
Other income (expense):
Interest expense	$	(3,640	)	$	(4,020	)	$	(7,360	)	$	(8,080	)
Interest income	383			415			780			898
Miscellaneous	—			228			(475		)	(317		)
Income before income taxes	$	19,931		$	22,391		$	37,617		$	42,031
	March 30, 2013			September 29, 2012
Total assets:
AMER	$	414,822		$	400,643
APAC	816,392			771,781
EMEA	112,832			88,420
Corporate	117,030			147,355
	$	1,461,076		$	1,408,199

NOTE 11—GUARANTEES

The Company offers certain indemnifications under its customer manufacturing agreements. In the normal course of business, the Company may from time to time be obligated to indemnify its customers or its customers’ customers against damages or liabilities arising out of the Company’s negligence, misconduct, breach of contract, or infringement of third party intellectual property rights. Certain agreements have extended broader indemnification, and while most agreements have contractual limits, some do not. However, the Company generally does not provide for such indemnities and seeks indemnification from its customers for damages or liabilities arising out of the Company’s adherence to customers’ specifications or designs or use of materials furnished, or directed to be used, by its customers. The Company does not believe its obligations under such indemnities are material.

In the normal course of business, the Company also provides its customers a limited warranty covering workmanship, and in some cases materials, on products manufactured by the Company. Such warranty generally provides that products will be free from defects in the Company’s workmanship and meet mutually agreed-upon specifications for periods generally ranging from 12 months to 24 months. If a product fails to comply with the Company’s limited warranty, the Company’s obligation is generally limited to correcting, at its expense, any defect by repairing or replacing such defective product. The Company’s warranty generally excludes defects resulting from faulty customer-supplied components, design defects or damage caused by any party or cause other than the Company.

The Company provides for an estimate of costs that may be incurred under its limited warranty at the time product revenue is recognized and establishes additional reserves for specifically identified product issues. These costs primarily include labor and

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materials, as necessary, associated with repair or replacement and are included in the Company’s accompanying Condensed Consolidated Balance Sheets in other current accrued liabilities. The primary factors that affect the Company’s warranty liability include the value and the number of shipped units and historical and anticipated rates of warranty claims. As these factors are impacted by actual experience and future expectations, the Company assesses the adequacy of its recorded warranty liabilities and adjusts the amounts as necessary.

Below is a table summarizing the activity related to the Company’s limited warranty liability for fiscal 2012 and for the six months endedMarch 30, 2013 (in thousands):

Limited warranty liability, as of October 1, 2011	$	5,453
Accruals for warranties issued during the period	649
Settlements (in cash or in kind) during the period	(957		)
Limited warranty liability, as of September 29, 2012	5,145
Accruals for warranties issued during the period	199
Settlements (in cash or in kind) during the period	(137		)
Limited warranty liability, as of March 30, 2013	$	5,207

NOTE 12—LITIGATION

The Company is party to certain other lawsuits in the ordinary course of business. Management does not believe that these proceedings, individually or in the aggregate, will have a material adverse effect on the Company’s consolidated financial position, results of operations or cash flows.

NOTE 13—CONTINGENCIES

As of March 30, 2013, the Company has approximately $6.4 million of outstanding accounts receivables and inventory related to a customer with poor financial health that has failed to make consistent payments. The Company has recorded $0.7 million, the estimated loss it believes is probable, in the allowance for doubtful accounts. The Company has commenced litigation to recover the outstanding accounts receivable balance and costs associated with inventory and open orders for materials required to manufacture the customer's product. The Company is currently working on a payment plan with the customer. Due to uncertainties in the litigation and negotiation processes and the financial health of the customer, however, it is at least reasonably possible that management's estimate of the outcome will change in the future; therefore, such additional loss cannot be estimated at this time.

NOTE 14—SHAREHOLDERS’ EQUITY

On October 23, 2012, the Board of Directors approved a stock repurchase program under which the Company is authorized to repurchase up to $50 million of its common stock. During the three months endedMarch 30, 2013, the Company repurchased 0.6 million shares for approximately $15.5 million, at an average price of $25.17 per share. For the six months endedMarch 30, 2013, the Company repurchased 0.9 million shares for approximately $21.5 million, at an average price of $24.56 per share. These shares were recorded as treasury stock. As of March 30, 2013, the Company had a commitment of approximately $0.7 million related to the purchase of 30,243 shares, which were purchased before March 30, 2013, but settled after the end of the fiscal second quarter.

NOTE 15—NEW ACCOUNTING PRONOUNCEMENTS

In February 2013, the Financial Accounting Standards Board (“FASB”) issued a standard that requires entities to present the changes in the components of accumulated other comprehensive income. Entities are required to present separately the amount of the change that is due to reclassifications, and the amount that is due to current period other comprehensive income. These changes may be shown before or net of tax, and displayed either on the face of the financial statements or in the footnotes. Public entities are required to comply with the standard for annual and interim periods starting with the first interim period in the fiscal period beginning after December 15, 2012. Early adoption is permitted. The Company adopted this guidance as of the second fiscal quarter of 2013 with no impact to the Company's consolidated financial position, results of operations or cash flows, as the guidance only related to the presentation of the Company's financial statement disclosures.

In January 2013, the FASB issued a clarification of its previous amendment to disclosures about offsetting assets and liabilities. The clarification stated which instruments and transactions are subject to the original amendment requiring an entity to disclose

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information about offsetting and related arrangements to enable users of its financial statements to understand the effects of those arrangements on its financial position. Public entities are required to apply the amendment for annual reporting periods beginning on or after January 1, 2013, and interim periods within those annual periods. An entity should provide the disclosures required by those amendments retrospectively for all comparative periods presented. This guidance will be effective for the Company's 2014 fiscal year and is not expected to have an impact on the Company's consolidated financial position, results of operations or cash flows, as the guidance only relates to the presentation of the Company's financial statement disclosures.

In June 2011, the FASB issued an amendment to comprehensive income guidance, which eliminates the option to present other comprehensive income and its components in the statement of shareholders’ equity. The Company can elect to report components of comprehensive income in either (1) a continuous statement of comprehensive income or (2) two separate but consecutive statements. This guidance is effective for financial statements issued for fiscal years, and interim periods within those years, beginning after December 15, 2011. The Company adopted this guidance as of the first fiscal quarter of 2013 with no impact to the Company's consolidated financial position, results of operations or cash flows, as the guidance only related to the presentation of the Company's financial statement disclosures.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

“SAFE HARBOR” CAUTIONARY STATEMENT:

The statements contained in this release which are guidance or which are not historical facts (such as statements in the future tense and statements including “believe,” “expect,” “intend,” “plan,” “anticipate,” “goal,” “target” and similar terms and concepts), including all discussions of periods which are not yet completed, are forward-looking statements that involve risks and uncertainties. These risks and uncertainties include, but are not limited to: the risk of customer delays, changes, cancellations or forecast inaccuracies in both ongoing and new programs; the poor visibility of future orders, particularly in view of current economic conditions; the effects on Plexus of Juniper Network, Inc.'s intended disengagement; the timing and adequacy of restructuring and similar charges as compared to actual expenses; the economic performance of the industries, sectors and customers we serve; the effects of the volume of revenue from certain sectors or programs on our margins in particular periods; our ability to secure new customers, maintain our current customer base and deliver product on a timely basis; the particular risks relative to new or recent customers or programs, which risks include customer and other delays, start-up costs, potential inability to execute, the establishment of appropriate terms of agreements, and the lack of a track record of order volume and timing; the risks of concentration of work for certain customers; our ability to manage successfully a complex business model characterized by high customer and product mix, low volumes and demanding quality, regulatory, and other requirements; the risk that new program wins and/or customer demand may not result in the expected revenue or profitability; the fact that customer orders may not lead to long-term relationships; the effects of shortages and delays in obtaining components as a result of economic cycles or natural disasters; the risks associated with excess and obsolete inventory, including the risk that inventory purchased on behalf of our customers may not be consumed or otherwise paid for by the customer, resulting in an inventory write-off; the weakness of areas of the global economy and the continuing instability of the global financial markets and banking system, including the potential inability of our customers or suppliers to access credit facilities; the effect of changes in the pricing and margins of products; the effect of start-up costs of new programs and facilities, such as our announced plans to replace facilities in Romania and the United States, and other recent, planned and potential future expansions; increasing regulatory and compliance requirements; possible unexpected costs and operating disruption in transitioning programs; raw materials and component cost fluctuations; the potential effect of fluctuations in the value of the currencies in which we transact business; the potential effects of regional results on our taxes and ability to use deferred tax assets; the potential effect of world or local events or other events outside our control (such as drug cartel-related violence in Mexico, instability in the Korean peninsula, changes in oil prices, terrorism and weather events); the impact of increased competition; and other risks detailed in the Company's Securities and Exchange Commission filings (particularly in Part I, Item 1A of our annual report on Form 10-K for the fiscal year ended September 29, 2012).

OVERVIEW

Plexus Corp. and its subsidiaries (together “Plexus,” the “Company,” or “we”) participate in the Electronic Manufacturing Services (“EMS”) industry. We deliver optimized Product Realization solutions through a unique Product Realization Value Stream services model. This customer focused services model seamlessly integrates innovative product conceptualization, design, commercialization, manufacturing, fulfillment and sustaining services to deliver comprehensive end-to-end solutions for customers in the Americas ("AMER"), Europe, Middle East and Africa ("EMEA") and Asia-Pacific ("APAC") regions. Customer service is provided to over 140 branded product companies in the Networking/Communications, Healthcare/Life Sciences, Industrial/Commercial and Defense/Security/Aerospace market sectors. Our customers’ products typically require exceptional production and supply-chain flexibility, necessitating an optimized demand-pull-based manufacturing and supply chain solution across an integrated global platform. Many of our customers’ products require complex configuration management and direct order fulfillment to their customers across the globe. In such cases we provide global logistics management and after-market service and repair. Our customers’ products may have stringent requirements for quality, reliability and regulatory compliance. We offer our customers the ability to outsource all phases of product realization, including product specifications; development, design and design verification; regulatory compliance support; prototyping and new product introduction; manufacturing test equipment development; materials sourcing, procurement and supply-chain management; product assembly/manufacturing, configuration and test; order fulfillment, logistics and service/repair.

We provide most of our contract manufacturing services on a turnkey basis, which means that we procure some or all of the materials required for product assembly. We provide some services on a consignment basis, which means that the customer supplies the necessary materials, and we provide the labor and other services required for product assembly. Turnkey services require material procurement and warehousing, in addition to manufacturing, and involve greater resource investments than consignment services. Other than certain test equipment and software used for internal operations, we do not design or manufacture our own proprietary products.

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As previously disclosed, on November 5, 2012, Juniper Networks, Inc. ("Juniper"), the Company's largest customer, notified the Company of its intent to disengage from Plexus. As a consequence, later in our fiscal first quarter, the Company and Juniper reached an understanding regarding the timing and other aspects of Juniper's disengagement. Production for Juniper is expected to conclude by the end of our third fiscal quarter of 2013. However, sales of certain inventory may continue into our fourth fiscal quarter of 2013. We do not expect to incur any material adjustments related to this inventory. We currently estimate that we will incur $1.0 to $1.5 million of restructuring costs (primarily severance) in the third quarter of fiscal 2013 in connection with the disengagement. Sales to Juniper were 16% of our net sales in the second quarter of fiscal 2013 as compared to 14% in the same period of fiscal 2012, primarily from the Company's AMER and APAC segments.

Our new Neenah, Wisconsin manufacturing facility, which will replace one owned and two leased facilities, is on schedule for completion late in the fiscal fourth quarter of 2013. Consolidation of the three other facilities into our new facility is expected to result in approximately $4.0 to $5.0 million of restructuring charges in the first half of fiscal 2014.

The following information should be read in conjunction with our Condensed Consolidated Financial Statements included herein, the “Risk Factors” section in Part I, Item 1A of our annual report on Form 10-K for the fiscal year ended September 29, 2012 and our “Safe Harbor” Cautionary Statement included above.

RESULTS OF OPERATIONS

Consolidated Performance Summary

The following table presents selected consolidated financial data (dollars in millions, except per share data):

	Three Months Ended						Six Months Ended
	March 30, 2013			March 31, 2012			March 30, 2013			March 31, 2012
Net sales	$	557.8		$	573.5		$	1,088.4		$	1,103.1
Gross profit	52.0			54.6			103.2			106.3
Gross margin	9.3		%	9.5		%	9.5		%	9.6		%
Operating income	23.2			25.8			44.7			49.5
Operating margin	4.2		%	4.5		%	4.1		%	4.5		%
Net income	18.0			20.0			34.6			37.8
Earnings per share (diluted)	$	0.52		$	0.56		$	1.00		$	1.07
Return on invested capital							12.7		%	14.4		%

Net sales. For the three months endedMarch 30, 2013, our net sales decreased by 2.7 percent compared to the three months endedMarch 31, 2012 primarily as a result of decreased end-market demand for one of our larger customers in the industrial/commercial sector as well as the disengagement of a customer in the same sector, which together represented a decrease of approximately $51.5 million. These decreases were partially offset by increased net sales across various customers in all other sectors.

For the six months endedMarch 30, 2013, our net sales decreased by 1.3 percent compared to the six months endedMarch 31, 2012 as a result of decreased end-market demand for one of our larger customers in the industrial/commercial sector and decreased net sales to Juniper, the Company's largest customer, which together represented a decrease of approximately $107.6 million. These decreases were partially offset by incremental net sales of $19.8 million from the Kontron arrangement, as well as increased net sales across various customers in all four sectors.

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Our net sales by market sector for the indicated periods were as follows (in millions):

	Three Months Ended				Six Months Ended
Market Sector	March 30, 2013		March 31, 2012		March 30, 2013		March 31, 2012
Networking/Communications	$	212.5	$	209.8	$	411.3	$	439.5
Industrial/Commercial	139.7		189.0		270.7		324.3
Healthcare/Life Sciences	129.2		114.9		262.2		228.9
Defense/Security/Aerospace	76.4		59.8		144.2		110.4
	$	557.8	$	573.5	$	1,088.4	$	1,103.1

Networking/Communications. Net sales for the networking/communications sector increased $2.7 million for the three months endedMarch 30, 2013 as compared to the three months endedMarch 31, 2012. The increase was primarily a result of increased net sales to Juniper related to its disengagement. The increase was partially offset by continued softened demand overall in this sector.

Net sales for the networking/communications sector decreased $28.2 million for the six months endedMarch 30, 2013 as compared to the six months endedMarch 31, 2012. The decrease in the sector was a result of decreased net sales to Juniper as well as to various other customers in the sector due to continued softened demand.

Industrial/Commercial. Net sales for the industrial/commercial sector decreased $49.3 million for the three months endedMarch 30, 2013 compared to the three months endedMarch 31, 2012. The decrease was primarily attributable to weaker demand from a significant customer as well as the disengagement of a customer, which together represented a decrease of approximately $51.5 million, partially offset by slight increases in net sales to various other customers in this sector.

Net sales for the industrial/commercial sector decreased $53.6 million for the six months endedMarch 30, 2013 compared to the six months endedMarch 31, 2012. This was a result of the factors noted in the previous paragraph, which together represented a decrease of approximately $78.3 million, partially offset by incremental revenue of approximately $19.8 million related to the Kontron arrangement.

Healthcare/Life Sciences. Net sales for the healthcare/life sciences sector increased $14.3 million for the three months endedMarch 30, 2013 compared to the three months endedMarch 31, 2012. The increase was primarily due to new program ramps.

For the same reasons, net sales for the healthcare/life sciences sector increased $33.3 million for the six months endedMarch 30, 2013 compared to the six months endedMarch 31, 2012.

Defense/Security/Aerospace. Net sales for the defense/security/aerospace sector increased $16.6 million for the three months endedMarch 30, 2013 compared to the three months endedMarch 31, 2012. The increase was primarily due to growth in new programs for an existing customer.

Growth in these programs was also the primary contributor to a $33.8 million increase in net sales for the defense/security/aerospace sector for the six months endedMarch 30, 2013 compared to the six months endedMarch 31, 2012.

Gross profit. For the three months endedMarch 30, 2013, gross profit decreased $2.6 million compared to the three months endedMarch 31, 2012 primarily due to decreased net sales and unfavorable changes in customer mix. Fixed expenses were comparable between the periods. These factors led to the reduction in gross margin to 9.3 percent for the three months endedMarch 30, 2013 from 9.5 percent for the three months endedMarch 31, 2012.

For the six months endedMarch 30, 2013 gross profit decreased $3.1 million compared to the six months endedMarch 31, 2012 primarily due to increased fixed expenses related to site expansions in Penang, Malaysia, Xiamen, China and Oradea, Romania, as well as unfavorable changes in customer mix. The decrease was partially offset by the sale of certain inventory that had previously been written down. As a result of the overall decreases in gross profit and net sales for the six months endedMarch 30, 2013 compared to the prior year period, gross margin declined to 9.5 percent compared to 9.6 percent.

Operating income. For the three months endedMarch 30, 2013, operating income decreased $2.6 million compared to the three months endedMarch 31, 2012. The operating income decline reflected the $2.6 million decrease in gross profit described above, while selling and administrative expenses (“S&A”) were flat. As a result, operating margin was 4.2 percent for the three months endedMarch 30, 2013 compared to 4.5 percent for the three months endedMarch 31, 2012.

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For the six months endedMarch 30, 2013 operating income decreased $4.8 million compared to the six months endedMarch 31, 2012. The operating income decrease reflected the $3.1 million decrease in gross profit described above as well as increased S&A expenses of about $1.8 million due to approximately $0.7 million of amortization expense in the current period related to the Kontron arrangement; in addition, the prior year period included $1.1 million of bad debt recovery. As a result of the factors discussed above, for the six months endedMarch 30, 2013 compared to the prior year period, operating margin declined to 4.1 percent compared to 4.5 percent.

Other income (expense). Other income (expense) decreased to $3.3 million and $7.1 million of expense for the three and six months endedMarch 30, 2013, respectively, from $3.4 million and $7.5 million of expense, respectively, in the prior year periods. The decrease in expense was primarily due to $0.4 million and $0.7 million of lower interest expense related to our term loan for the three and six month periods ended March 30, 2013, respectively.

Income taxes. Effective annual income tax rates for the indicated periods were as follows:

	Three Months Ended		Six Months Ended
	March 30, 2013	March 31, 2012	March 30, 2013	March 31, 2012
Effective annual tax rate	10%	11%	8%	10%

Income tax expense decreased to $2.0 million and $3.0 million for the three and six months endedMarch 30, 2013, respectively, as compared to $2.4 million and $4.2 million for the three and six months endedMarch 31, 2012, respectively, as a result of the decrease in our effective tax rate. Our effective tax rate varies from the U.S. statutory rate of 35 percent primarily as a result of the amount of earnings from different U.S. and foreign jurisdictions, and tax holidays granted to our subsidiaries in China and Malaysia, where we derive a significant portion of our earnings. The effective tax rate for both the three and six months endedMarch 30, 2013 is lower than the effective rate for the three and six months endedMarch 31, 2012 primarily as a result of increased income in the APAC segment that benefits from reduced taxes due to tax holidays. The increase in the effective tax rate for the quarter, compared to current year-to-date, was the result of an assessment from the Internal Revenue Service ("IRS") resulting from an audit of fiscal 2008 through 2010. Our effective tax rate could fluctuate in the future depending on the geographic distribution of our worldwide earnings.

The estimated annual effective tax rate for all of fiscal 2013 is expected to be between 6 percent and 8 percent.

Net income. Primarily as a result of lower gross profit, net income for the three months endedMarch 30, 2013 decreased by $2.0 million, or 10.0 percent, to $18.0 million from $20.0 million for the three months endedMarch 31, 2012. Net income for the six months endedMarch 30, 2013 decreased by $3.2 million, or 8.5 percent, to $34.6 million from $37.8 million for the six months endedMarch 31, 2012 as a result of lower gross profit and increased S&A expenses.

Diluted earnings per share. Diluted earnings per share decreased to $0.52 and $1.00 for the three and six months endedMarch 30, 2013, respectively, from $0.56 and $1.07, respectively, in the prior year periods. The decrease in diluted earnings per share was primarily due to the decrease in net income as well as a decrease in the number of shares outstanding as a result of our stock repurchase program.

Return on Invested Capital (“ROIC”). We use a 5-10-5 financial model which is aligned with our business strategy, and includes a ROIC goal of 500 basis points over our weighted average cost of capital (“WACC”), a 10 percent gross margin target and a 5 percent operating margin target. Our primary focus is our ROIC goal, which is designed to create shareholder value and generate enough cash to self-fund our targeted organic revenue growth rate of 15 percent.

We review our internal calculation of WACC annually, and our estimated WACC is 12 percent for fiscal 2013. By exercising discipline to generate ROIC in excess of our WACC, our goal is to create value for our shareholders. ROIC was 12.7 percent and 14.4 percent for the six months endedMarch 30, 2013 and March 31, 2012, respectively. This decrease was due to lower annualized operating income and higher average invested capital (as defined below).

We define ROIC as tax-effected annualized operating income divided by average invested capital over a rolling three-quarter period for the second quarter. Invested capital is defined as equity plus debt, less cash and cash equivalents. Other companies may not define or calculate ROIC in the same way. ROIC is a non-GAAP financial measure which should be considered in addition to, not as a substitute for, measures of our financial performance prepared in accordance with United States generally accepted accounting principles (“GAAP”).

Non-GAAP financial measures, including ROIC, are used for internal management assessments because such measures provide additional insight into ongoing financial performance. In particular, we provide ROIC because we believe it offers insight into

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the metrics that are driving management decisions. We view ROIC as an important measure in evaluating the efficiency and effectiveness of our long-term capital requirements. We also use ROIC as a performance criteria in determining certain elements of compensation.

For a reconciliation of ROIC to our financial statements that were prepared using GAAP, see exhibit 99.1 to this quarterly report on Form 10-Q, which exhibit is incorporated herein by reference.

REPORTABLE SEGMENTS

A further discussion of financial performance by reportable segment is presented below (dollars in millions):

	Three Months Ended						Six Months Ended
	March 30, 2013			March 31, 2012			March 30, 2013			March 31, 2012
Net sales:
AMER	$	259.8		$	331.7		$	518.9		$	652.6
APAC	288.3			261.6			560.7			496.3
EMEA	34.9			27.8			63.1			47.3
Elimination of inter-segment sales	(25.2		)	(47.6		)	(54.3		)	(93.1		)
	$	557.8		$	573.5		$	1,088.4		$	1,103.1
Operating income (loss):
AMER	$	16.5		$	26.2		$	35.8		$	49.3
APAC	26.9			21.8			52.1			44.8
EMEA	0.8			0.3			0.6			(0.6		)
Corporate and other costs	(21.0		)	(22.5		)	(43.8		)	(44.0		)
	$	23.2		$	25.8		$	44.7		$	49.5

Americas (AMER): Net sales for the three months endedMarch 30, 2013 decreased $71.9 million, or 21.7 percent, as compared to the prior year period due primarily to lower end-market demand from a significant industrial/commercial sector customer as well as soft demand across all sectors, particularly in the networking/communications and industrial/commercial sectors. Net sales in the networking/communications sector also decreased due to a drop in demand from Juniper for products manufactured in this segment, compared to the prior year period. Operating income for the three months endedMarch 30, 2013 decreased $9.7 million, or 37.0 percent, as compared to the prior year period, due primarily to the decrease in net sales and unfavorable changes in customer mix.

Net sales for the six months endedMarch 30, 2013 decreased $133.7 million, or 20.5 percent, due primarily to lower end-market demand from a significant industrial/commercial sector customer as well as decreased demand from Juniper. Additionally, we experienced softer demand from other customers in all of our sectors. Operating income for the six months endedMarch 30, 2013 decreased $13.5 million, or 27.4 percent, as compared to the prior year period, due primarily to the decrease in net sales.

Asia Pacific (APAC): Net sales for the three months endedMarch 30, 2013 increased $26.7 million, or 10.2 percent, as compared to the prior year period primarily due to increased production for Juniper in this segment. We also experienced increased sales related to new program wins with an existing customer in our defense/security/aerospace sector, partially offset by soft end-market demand in our networking/communications sector. Operating income for the three months endedMarch 30, 2013 increased $5.1 million, or 23.4 percent, as compared to the prior year period due primarily to increased net sales and favorable changes in customer mix.

Net sales for the six months endedMarch 30, 2013 increased $64.4 million, or 13.0 percent, primarily as a result of new programs wins with an existing customer in the defense/security/aerospace sector, $19.8 million of incremental revenue from the Kontron arrangement and increased demand from a customer in our healthcare/life sciences sector. These increases were partially offset by soft end-market demand in our networking/communications sector. Operating income for the six months endedMarch 30, 2013 increased $7.3 million, or 16.3 percent, as compared to the prior year period due to increased net sales.

Europe, Middle East, Africa (EMEA): Net sales for the three months endedMarch 30, 2013 increased $7.1 million, or 25.5 percent, as compared to the prior year period due primarily to increased demand from a customer in the defense/security/aerospace sector as well as increased sales from the ramp of new customers in the healthcare/life sciences and defense/security/

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aerospace sectors. These increases were partially offset by soft end-market demand in the industrial/commercial sector. Operating income for the three months endedMarch 30, 2013 increased $0.5 million, as compared to the prior year period due to increased utilization of our Romanian facility, as well as increased net sales from our United Kingdom facility.

Net sales for the six months endedMarch 30, 2013 increased $15.8 million, or 33.4 percent, due primarily to increased demand from a customer in the defense/security/aerospace sector, a customer in the healthcare/life sciences sector and a new customer in the networking/communications sector. These increases were partially offset by soft end-market demand in the industrial/commercial sector. Operating income was $0.6 million for the six months endedMarch 30, 2013 as compared to an operating loss of $0.6 million in the prior year period. The increase was due primarily to increased utilization of both our Romanian manufacturing facility and our German engineering facility.

LIQUIDITY AND CAPITAL RESOURCES

Cash and cash equivalents were $276.5 million as of March 30, 2013 compared to $297.6 million as of September 29, 2012. The decrease in the balance of our cash and cash equivalents was due primarily to purchases of common stock as part of our stock repurchase program as well as increased capital expenditures for footprint expansions, partially offset by cash flows generated from operations.

As of March 30, 2013, approximately three-quarters of our cash balance was held outside of the U.S. by our foreign subsidiaries. Certain foreign countries impose taxes and overall penalties on transfers of cash; however, our intent is to permanently reinvest funds held in these countries. If this cash were remitted to the U.S., additional tax obligations may result that would reduce the amount of cash ultimately available to us in the U.S. Currently, we believe that cash held in the U.S., together with cash available under U.S. credit facilities and cash from foreign subsidiaries that could be remitted to the U.S. without tax consequences, will be sufficient to meet our U.S. liquidity needs for the next twelve months and for the foreseeable future.

Cash Flows. The table below shows a summary of cash flows for the periods presented (dollars in millions):

	Six Months Ended
	March 30, 2013			March 31, 2012
Cash provided by operating activities	$	62.9		$	82.0
Cash used in investing activities	(53.1		)	(65.6		)
Cash used in financing activities	$	(30.6	)	$	(1.3	)

Operating Activities. Cash flows provided by operating activities were $62.9 million for the six months endedMarch 30, 2013, as compared to cash flows provided by operating activities of $82.0 million for the six months endedMarch 31, 2012. Cash flows provided by operating activities decreased primarily due to working capital requirements.

The following table shows a summary of cash cycle days for the periods indicated (in days):

	Three Months Ended
	March 30, 2013		March 31, 2012
Days in accounts receivable	55		47
Days in inventory	87		87
Days in accounts payable	(61	)	(62	)
Days in cash deposits	(17	)	(6	)
Annualized cash cycle	64		66

We calculate days in accounts receivable as accounts receivable for the respective quarter divided by annualized sales for the respective quarter by day. We calculate days in inventory, accounts payable, and cash deposits as each balance sheet line item for the respective quarter divided by annualized cost of sales for the respective quarter by day.

Days in accounts receivable for the three months endedMarch 30, 2013 increased by eight days compared to the three months endedMarch 31, 2012, primarily due to a change in payment terms with Juniper related to its disengagement and overall decreased net sales.

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Days in inventory for the three months endedMarch 30, 2013 remained the same compared to the three months endedMarch 31, 2012.

Days in accounts payable for the three months endedMarch 30, 2013 decreased by one day compared to the three months endedMarch 31, 2012, primarily due to timing.

Days in cash deposits for the three months endedMarch 30, 2013 increased by 11 days compared to the three months endedMarch 31, 2012 as a result of a large deposit received from Juniper in relation to its disengagement.

We calculate annualized cash cycle as the sum of days in accounts receivable and days in inventory, less days in accounts payable and days in cash deposits. For the three months endedMarch 30, 2013 annualized cash cycle days improved by two days compared to the three months endedMarch 31, 2012 due to the factors noted above.

Free Cash Flow. Free cash flow (“FCF”), which we define as cash flow provided by (used in) operations less capital expenditures, decreased for the six months endedMarch 30, 2013, to $9.6 million, as compared to $49.1 million for the six months endedMarch 31, 2012. Increased working capital needs and capital expenditures for footprint expansion in Neenah, Wisconsin and Oradea, Romania were the primary uses of cash.

Non-GAAP financial measures, including FCF, are used for internal management assessments because such measures provide additional insight into ongoing financial performance. In particular, we provide FCF because we believe it offers insight into the metrics that are driving management decisions. We view FCF as an important financial metric as it demonstrates our ability to generate cash and allows us to pursue opportunities that enhance shareholder value. FCF is a non-GAAP financial measure which should be considered in addition to, not as a substitute for, measures of our financial performance prepared in accordance with U.S. GAAP.

For a reconciliation of FCF to our financial statements that were prepared using GAAP, see below (in millions):

	Six Months Ended
	March 30, 2013			March 31, 2012
Cash provided by operating activities	$	62.9		$	82.0
Capital expenditures	(53.3		)	(32.9		)
Free cash flow	$	9.6		$	49.1

Investing Activities. Cash flows used in investing activities totaled $53.1 million for the six months endedMarch 30, 2013 as compared to cash flows used in investing activities of $65.6 million for the six months endedMarch 31, 2012. Cash flows used in investing activities decreased primarily due to the prior period having included the Kontron arrangement; however, this decrease was partially offset by the additional investments in footprint expansions noted above.

We utilized available cash and operating cash flows as the sources for funding our operating requirements. We currently estimate capital expenditures for fiscal 2013 to be approximately $90 million of which $53.3 million of expenditures were made through the second quarter of fiscal 2013. A significant portion of the remaining fiscal 2013 capital expenditures is anticipated to be used for the completion of our previously announced manufacturing facilities in Neenah, Wisconsin and Oradea, Romania to replace leased and owned buildings in both locations. We believe the estimated capital expenditures will continue to be funded from operations, and may be supplemented by short-term borrowings, if required.

Financing Activities.Cash flows used in financing activities totaled $30.6 million for the six months endedMarch 30, 2013, as compared to cash flows used in financing activities of $1.3 million for the six months endedMarch 31, 2012. Cash flows used in financing activities for the six months endedMarch 30, 2013 were comprised primarily of $21.5 million of purchases of common stock as part of our stock repurchase program as well as payments on debt and capital leases. Cash flows used in financing activities for the six months endedMarch 31, 2012 were comprised primarily of payments on debt and capital leases.

On October 23, 2012, the Board of Directors approved a new stock repurchase program under which the Company is authorized to repurchase up to $50 million of its common stock. As of March 30, 2013, the Company had repurchased 877,105 shares for approximately $21.5 million, at an average price of $24.56 per share. These shares were recorded as treasury stock. As of March 30, 2013, the Company had a commitment of approximately $0.7 million related to the purchase of 30,243 shares, which were purchased before March 30, 2013, but settled after the end of the fiscal second quarter. It is anticipated that this program will continue to be funded with existing cash and is expected to be executed quarterly, on a relatively consistent basis, during the remainder of fiscal 2013.

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On May 15, 2012, the Company entered into a five-year, $250 million senior unsecured credit facility that terminates on May 15, 2017 (the “Credit Facility”). The Credit Facility includes a $160 million revolving credit facility and a $90 million term loan. The revolving credit facility potentially may be increased by $100 million (the "increase option") to $260 million generally by mutual agreement of the Company, the lenders, the letter of credit issuers and the administrative agent named in the related credit agreement (the "Credit Agreement"), subject to certain customary conditions. The Credit Facility was used to refinance the Company's then-existing $100 million senior unsecured revolving credit facility (no amounts were outstanding at that time) and its $150 million senior unsecured term loan (balance of $90.0 million as of May 15, 2012), both of which were scheduled to mature on April 4, 2013, and for general corporate purposes. Quarterly principal repayments of the Credit Facility term loan of $3.75 million per quarter began on June 29, 2012 and ended on March 28, 2013. The final $75 million payment is due on May 15, 2017.

The financial covenants (as defined under the Credit Facility) require that the Company maintain, as of each fiscal quarter end, a maximum total leverage ratio and a minimum interest coverage ratio. As of March 30, 2013, the Company was in compliance with all covenants of the Credit Facility. Borrowings under the Credit Facility, at the Company's option, bear interest at a defined base rate or the LIBOR rate plus, in each case, an applicable margin based upon the Company's leverage ratio as defined in the Credit Agreement. Rates would increase upon negative changes in specified Company financial metrics and would decrease upon reduction in the current total leverage ratio, to no less than LIBOR plus 1.00% or the base rate plus 0%. We are also required to pay an annual commitment fee on the unused revolver credit commitment based on our leverage ratio; the fee was 0.2% as of March 30, 2013. As of April 4, 2013, the interest rate swap associated with our term loan expired, resulting in a floating rate for our term debt ($75 million outstanding as of March 30, 2013).

During the third quarter of fiscal 2011, we issued $175 million in principal amount of 5.20% Senior Notes, due June 15, 2018 (the “Notes”), pursuant to a Note Purchase Agreement (the “Note Purchase Agreement”). As of March 30, 2013, we had Notes outstanding of $175.0 million.

The Note Purchase Agreement contains certain financial covenants, which include a maximum total leverage ratio, a minimum interest coverage ratio and a minimum net worth test, all as defined in the agreements. As of March 30, 2013, we were in compliance with all such covenants.

The Credit Facility and Note Purchase Agreement allow for the future payment of cash dividends or the future repurchases of shares provided that no event of default (including any failure to comply with a financial covenant) exists at the time of, or would be caused by, the dividend payment or the share repurchases. We have not paid cash dividends in the past and do not currently anticipate paying them in the future. However, we evaluate from time to time potential uses of excess cash, which in the future may include share repurchases, a special dividend or recurring dividends.

Based on current expectations, we believe that our projected cash flows from operations, available cash and cash equivalents, the Credit Facility, and our leasing capabilities should be sufficient to meet our working capital and fixed capital requirements for the next twelve months and for the foreseeable future. Further, $160 million of committed credit is currently available under the Credit Facility, with another $100 million potentially available pursuant to the increase option described above. If our future financing needs increase, we may need to arrange additional debt or equity financing. Accordingly, we evaluate and consider from time to time various financing alternatives to supplement our financial resources. However, particularly due to the current uncertainty of the credit and financial markets, we cannot be assured that we will be able to make any such arrangements on acceptable terms.

CONTRACTUAL OBLIGATIONS, COMMITMENTS AND OFF-BALANCE SHEET OBLIGATIONS

Our disclosures regarding contractual obligations and commercial commitments are located in various parts of our regulatory filings. Information in the following table provides a summary of our contractual obligations and commercial commitments as of March 30, 2013 (dollars in millions):

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	Payments due by fiscal year
Contractual Obligations	Total		Remaining 2013		2014-2015		2016-2017		2018 and thereafter
Long-Term Debt Obligations (1,2)	$	300.3	$	5.0	$	19.8	$	94.3	$	181.2
Capital Lease Obligations	13.9		2.0		8.1		3.8		—
Operating Lease Obligations	32.2		7.4		17.9		5.2		1.7
Purchase Obligations (3)	308.7		305.2		3.1		0.1		0.3
Other Long-Term Liabilities on the Balance Sheet (4)	9.3		0.5		2.0		1.1		5.7
Other Long-Term Liabilities not on the Balance Sheet (5)	36.8		31.5		5.3		—		—
Total Contractual Cash Obligations	$	701.2	$	351.6	$	56.2	$	104.5	$	188.9

1) Includes amounts outstanding under the Credit Facility. As of March 30, 2013, the outstanding balance was $75.0 million. The amounts listed above include interest; see Note 5 in Notes to Condensed Consolidated Financial Statements for further information.

2) Includes $175 million in principal amount of Notes issued in fiscal 2011. The amounts listed above include interest; see Note 5 in Notes to Condensed Consolidated Financial Statements for further information.

3) As of March 30, 2013, purchase obligations consist of purchases of inventory and equipment in the ordinary course of business.

4) As of March 30, 2013, other long-term obligations on the balance sheet included deferred compensation obligations to certain of our former and current executive officers, as well as other key employees, and an asset retirement obligation. We have excluded from the above table the impact of approximately $7.3 million, as of March 30, 2013, related to unrecognized income tax benefits. The Company cannot make reliable estimates of the future cash flows by period related to this obligation.

5) As of March 30, 2013, other long-term obligations not on the balance sheet consisted of a commitment for salary continuation in the event employment of one executive officer of the Company is terminated without cause as well as commitments to build new manufacturing facilities in Neenah, Wisconsin and Oradea, Romania.

DISCLOSURE ABOUT CRITICAL ACCOUNTING POLICIES

Our critical accounting policies are disclosed in our 2012 annual report on Form 10-K. During the second quarter of fiscal 2013, there were no material changes to these policies.

NEW ACCOUNTING PRONOUNCEMENTS

See Note 15 in Notes to Condensed Consolidated Financial Statements for further information regarding new accounting pronouncements.

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ITEM 3.    QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We are exposed to market risk from changes in foreign exchange and interest rates. We selectively use financial instruments to reduce such risks.

Foreign Currency Risk

We do not use derivative financial instruments for speculative purposes. Our policy is to selectively hedge our foreign currency denominated transactions in a manner that partially offsets the effects of changes in foreign currency exchange rates. We typically use foreign currency contracts to hedge only those currency exposures associated with certain assets and liabilities denominated in non-functional currencies. Corresponding gains and losses on the underlying transaction generally offset the gains and losses on these foreign currency hedges. Our international operations create potential foreign exchange risk. Our percentages of transactions denominated in currencies other than the U.S. dollar for the indicated periods were as follows:

	Three Months Ended				Six Months Ended
	March 30, 2013		March 31, 2012		March 30, 2013		March 31, 2012
Net sales	8	%	5	%	7	%	5	%
Total costs	14	%	15	%	14	%	13	%

The Company has evaluated the potential foreign currency exchange rate risk on transactions denominated in currencies other than the U.S. Dollar for the periods presented above. Based on the Company’s overall currency exposure, as of March 30, 2013 a 10 percent change in the value of the U.S. Dollar relative to our other transactional currencies would not have a material effect on the Company’s financial position, results of operations, or cash flows.

Interest Rate Risk

We have financial instruments, including cash equivalents, which are sensitive to changes in interest rates. We consider the use of interest rate swaps based on existing market conditions and entered into interest rate swaps for our term loans, which matured on April 4, 2013. For more information, refer to Note 6, "Derivatives and Fair Value Measurements," in Notes to Condensed Consolidated Financial Statements. Interest rate swap agreements are subject to the further risk that the counterparties to these agreements may fail to comply with their obligations thereunder.

The primary objective of our investment activities is to preserve principal, while maximizing yields without significantly increasing market risk. To achieve this, we maintain our portfolio of cash equivalents in a variety of highly rated securities, money market funds and certificates of deposit, and limit the amount of principal exposure to any one issuer.

As of March 30, 2013, our only material interest rate risk is associated with our term loan under our Credit Facility. Through the use of interest rate swaps, as described above, we fixed the basis on which we pay interest, and the borrowings under the Note Purchase Agreement are based on a fixed interest rate, thus eliminating much of our interest rate risk.

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ITEM 4.    CONTROLS AND PROCEDURES

Disclosure Controls and Procedures: The Company maintains disclosure controls and procedures designed to ensure that the information the Company must disclose in its filings with the Securities and Exchange Commission (“SEC”) is recorded, processed, summarized and reported on a timely basis. The Company’s principal executive officer and principal financial officer have reviewed and evaluated, with the participation of the Company’s management, the Company’s disclosure controls and procedures as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”) as of the end of the period covered by this report (the “Evaluation Date”). Based on such evaluation, the chief executive officer and chief financial officer have concluded that, as of the Evaluation Date, the Company’s disclosure controls and procedures are effective (a) in recording, processing, summarizing and reporting, on a timely basis, information required to be disclosed by the Company in the reports the Company files or submits under the Exchange Act, and (b) in assuring that information is accumulated and communicated to the Company’s management, including the chief executive officer and chief financial officer, as appropriate to allow timely decisions regarding required disclosure.

Changes in Internal Control Over Financial Reporting: During the second quarter of fiscal 2013, there have been no changes to the Company’s internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

Limitations on the Effectiveness of Controls: Our management, including our chief executive officer and chief financial officer, does not expect that our disclosure controls and internal controls will prevent all errors and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the Company have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty, and that breakdowns can occur because of simple errors or mistakes. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the control. The design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions; over time, a control may become inadequate because of changes in conditions, or the degree of compliance with the policies or procedures may deteriorate. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.

Notwithstanding the foregoing limitations on the effectiveness of controls, we have nonetheless reached the conclusion that the Company’s disclosure controls and procedures are effective at the reasonable assurance level.

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PART II. OTHER INFORMATION

ITEM 1A.    Risk Factors

In addition to the risks and uncertainties discussed herein, particularly those discussed in the “Safe Harbor” Cautionary Statement and "Management’s Discussion and Analysis of Financial Condition and Results of Operations" in Part I, Item 2, see the risk factors set forth in Part I, Item 1A of our annual report on Form 10-K for the fiscal year ended September 29, 2012.

ITEM 2.     Unregistered Sales Of Equity Securities and Use Of Proceeds

The following table provides the specified information about the repurchases of shares by the Company during the three months ended March 30, 2013.

Period	Total number of shares purchased	Average price paid per share		Total number of shares purchased as part of publicly announced plans or programs	Maximum approximate dollar value of shares that may yet be purchased under the plans or programs*
December 30, 2012 to January 26, 2013	117,179	$	25.30	117,179	$	40,965,258
January 27 to February 23, 2013	194,304	26.05		194,304	$	35,902,961
February 24 to March 30, 2013	303,200	24.55		303,200	$	28,458,797
Total	614,683	$	25.17	614,683

* On October 23, 2012, the Board of Directors approved a stock repurchase program under which the Company is authorized to repurchase up to $50 million of its common stock. As of March 30, 2013, the Company had repurchased 877,105 shares for approximately $21.5 million, at an average price of $24.56 per share. These shares were recorded as treasury stock. As of March 30, 2013, the Company had a commitment of approximately $0.7 million related to the purchase of 30,243 shares, which were purchased before March 30, 2013, but settled after the end of the fiscal second quarter.

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ITEM 6.    Exhibits

31.1	Certification of Chief Executive Officer pursuant to Section 302(a) of the Sarbanes Oxley Act of 2002.
31.2	Certification of Chief Financial Officer pursuant to Section 302(a) of the Sarbanes Oxley Act of 2002.
32.1	Certification of the CEO pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2	Certification of the CFO pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
99.1	Reconciliation of ROIC to GAAP Financial Statements
101	The following materials from Plexus Corp.’s Quarterly Report on Form 10-Q for the quarter ended March 30, 2013, formatted in XBRL (Extensible Business Reporting Language): (i) the Condensed Consolidated Statements of Comprehensive Income, (ii) the Condensed Consolidated Balance Sheets, (iii) the Condensed Consolidated Statements of Cash Flows, and (iv) Notes to Condensed Consolidated Financial Statements.
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	Plexus Corp.
	Registrant
Date:5/2/13	/s/ Dean A. Foate
	Dean A. Foate
	Chairman, President and Chief Executive Officer
Date:5/2/13	/s/ Ginger M. Jones
	Ginger M. Jones
	Senior Vice President and Chief Financial Officer

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EX-31.1

Exhibit 31.1

CERTIFICATION

I, Dean A. Foate, certify that:

1. I have reviewed this quarterly report on Form 10-Q for the quarter ended March 30, 2013 of Plexus Corp.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 2, 2013

/s/    Dean A. Foate        

Dean A. Foate

Chairman, President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Ginger M. Jones, certify that:

1. I have reviewed this quarterly report on Form 10-Q for the quarter ended March 30, 2013 of Plexus Corp.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to

make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 2, 2013

/s/    Ginger M. Jones        

Ginger M. Jones

Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Plexus Corp. (the “Company”) on Form 10-Q for the quarterly period ended March 30, 2013, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Dean A. Foate, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/    Dean A. Foate        

Dean A. Foate

Chief Executive Officer

May 2, 2013

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to Plexus Corp. and will be retained by Plexus Corp. and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Plexus Corp. (the “Company”) on Form 10-Q for the quarterly period ended March 30, 2013, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Ginger M. Jones, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/    Ginger M. Jones        

Ginger M. Jones

Chief Financial Officer

May 2, 2013

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to Plexus Corp. and will be retained by Plexus Corp. and furnished to the Securities and Exchange Commission or its staff upon request.

EX-99.1

Exhibit 99.1

PLEXUS CORP.

NON-GAAP SUUPLEMENTAL INFORMATION

(in thousands, except per share data)

(unaudited)

ROIC Calculation

	Six Months Ended				Three Months Ended				Six Months Ended
	March 30, 2013				December 29, 2012				March 31, 2012
Operating income	$	44,672			$	21,484			$	49,530
	x		2		x		4		x		2
Annualized operating income	89,344				85,936				99,060
Tax rate	8			%	6			%	10			%
Tax impact	-		7,148		-		5,156		-		9,906
Operating income (tax effected)	$	82,196			$	80,780			$	89,154
Average invested capital	$	645,402			$	640,992			$	619,311
ROIC	12.7			%	12.6			%	14.4			%

	March 30, 2013			December 29, 2012			September 29, 2012
Equity	$	669,047		$	664,515		$	649,022
Plus:
Debt—current	2,893			10,310			10,211
Debt—non-current	258,789			259,516			260,211
Less:
Cash and cash equivalents	(276,507		)	(274,183		)	(297,619		)
	$	654,222		$	660,158		$	621,825

Fiscal 2013 second quarter average invested capital (March 30, 2013, December 29, 2012 and September 29, 2012) was $645,402.

Fiscal 2013 first quarter average invested capital (December 29, 2012 and September 29, 2012) was $640,992.

	March 31, 2012			December 31, 2011			October 1, 2011
Equity	$	615,296		$	581,811		$	558,882
Plus:
Debt—current	17,518			17,446			17,350
Debt—non-current	261,542			265,941			270,292
Less:
Cash and cash equivalents	(257,754		)	(248,284		)	(242,107		)
	$	636,602		$	616,914		$	604,417

Fiscal 2012 second quarter average invested capital (March 31, 2012, December 31, 2011 and October 1, 2011) was $619,311.

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Stock-Based Compensation (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Mar. 30, 2013	Mar. 31, 2012
Share-based Compensation [Abstract]
Allocated Share-based Compensation Expense	$ 3.1	$ 3.7	$ 5.9	$ 6.4

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Debt (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Mar. 30, 2013 Rate	May 15, 2012	May 15, 2012 New Credit Facility [Member]	May 15, 2012 Revolving Loans New Credit Facility[Member]	Apr. 04, 2008 Revolving Loans Prior Credit Facility [Member]	May 15, 2012 Term Loans Prior Credit Facility [Member]	Apr. 04, 2008 Term Loans Prior Credit Facility [Member]	Mar. 30, 2013 Term Loans New Credit Facility [Member]	May 15, 2012 Term Loans New Credit Facility [Member]	May 15, 2012 Increase Option [Member]	Mar. 30, 2013 Senior Notes [Member]	Sep. 29, 2012 Senior Notes [Member]	Jan. 01, 2011 Senior Notes [Member] Rate
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity			$ 250	$ 160	$ 100
Credit facility outstanding at end of period						90.0	150.0	75.0	90.0
Contractual Quarterly Debt Repayment Amount		3.75
Contractual Balloon Debt Repayment		75
Line of Credit Facility, Maximum Borrowing Capacity				260						100
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	1.00%
Debt Instrument, Interest Rate at Period End	1.13%
Line of Credit, Unused Capacity, Commitment Fee Percentage at Period End	0.20%
Deferred Finance Costs, Net		0.9
Debt Instrument, Interest Rate, Stated Percentage													5.20%
Senior Notes, principal outstanding											$ 175	$ 175

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Derivatives And Fair Value Measurements (Tables)

6 Months Ended

Mar. 30, 2013

Derivatives And Fair Value Measurements [Abstract]

Schedule Of Fair Values Of Derivative Instruments

Fair Values of Derivative Instruments
In thousands of dollars
	Asset Derivatives					Liability Derivatives
		March 30, 2013		September 29, 2012			March 30, 2013		September 29, 2012
Derivatives designated as hedging instruments	Balance Sheet Location	Fair Value		Fair Value		Balance Sheet Location	Fair Value		Fair Value
Interest rate swaps		$	—	$	—	Current liabilities – Other	$	62	$	1,715
Forward contracts	Prepaid expenses and other	$	358	$	1,095		$	—	$	—

Schedule Of The Effect Of Derivative Instruments On The Condensed Statements Of Operations

The Effect of Derivative Instruments on the Condensed Statements of Comprehensive Income
for the Three Months Ended
In thousands of dollars
Derivatives in Cash Flow Hedging Relationships	Amount of Gain or (Loss) Recognized in Other Comprehensive Income (“OCI”) on Derivative (Effective Portion)						Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)						Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)
	March 30, 2013			March 31, 2012				March 30, 2013			March 31, 2012				March 30, 2013		March 31, 2012
Interest rate swaps	$	1,610		$	(189	)	Interest income (expense)	$	(62	)	$	(903	)	Other income (expense)	$	—	$	—
Forward contracts	$	(177	)	$	1,772		Selling and administrative expenses	$	179		$	63		Other income (expense)	$	—	$	—
Treasury Rate Locks	$	—		$	—		Interest income (expense)	$	81		$	81		Other income (expense)	$	—	$	—

Schedule Of Fair Value Measurements Using Input Levels Asset/(Liability)

The following table lists the fair values of assets/(liabilities) of the Company’s derivatives as of March 30, 2013, by input level as defined above (in thousands):

Derivatives	Level 1		Level 2			Level 3		Total
Interest rate swaps	$	—	$	(62	)	$	—	$	(62	)
Foreign currency forward contracts	$	—	$	358		$	—	$	358

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Guarantees (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Mar. 30, 2013	Sep. 29, 2012
Product Warranty [Line Items]
Limited warranty liability, beginning balance	$ 5,145	$ 5,453
Accruals for warranties issued during the period	199	649
Settlements (in cash or in kind) during the period	(137)	(957)
Limited warranty liability, ending balance	$ 5,207	$ 5,145
Minimum [Member]
Product Warranty [Line Items]
Products warranty specifications period, months	12
Maximum [Member]
Product Warranty [Line Items]
Products warranty specifications period, months	24

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Derivatives And Fair Value Measurements (Schedule Of Fair Value Measurements Using Input Levels Asset/(Liability)) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2013
Fair Value, Inputs, Level 2 [Member]
Derivatives And Fair Value Measurements [Line Items]
Fair value of derivative, net	$ (62)
Interest Rate Swaps [Member]
Derivatives And Fair Value Measurements [Line Items]
Fair value of derivative, net	(62)
Interest Rate Swaps [Member] | Fair Value, Inputs, Level 1 [Member]
Derivatives And Fair Value Measurements [Line Items]
Fair value of derivative, net	0
Interest Rate Swaps [Member] | Fair Value, Inputs, Level 3 [Member]
Derivatives And Fair Value Measurements [Line Items]
Fair value of derivative, net	0
Foreign Currency Forward Contracts [Member]
Derivatives And Fair Value Measurements [Line Items]
Fair value of derivative, net	358
Foreign Currency Forward Contracts [Member] | Fair Value, Inputs, Level 1 [Member]
Derivatives And Fair Value Measurements [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	0
Foreign Currency Forward Contracts [Member] | Fair Value, Inputs, Level 2 [Member]
Derivatives And Fair Value Measurements [Line Items]
Fair value of derivative, net	358
Foreign Currency Forward Contracts [Member] | Fair Value, Inputs, Level 3 [Member]
Derivatives And Fair Value Measurements [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	$ 0

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Property, Plant And Equipment

6 Months Ended

Mar. 30, 2013

Property, Plant and Equipment, Net [Abstract]

Property, Plant And Equipment

PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment consisted of the following categories (in thousands):

	March 30, 2013		September 29, 2012
Land, buildings and improvements	$	186,761	$	170,557
Machinery and equipment	305,920		295,548
Computer hardware and software	89,764		85,433
Construction in progress	58,701		39,894
	641,146		591,432
Less: accumulated depreciation	346,008		326,241
	$	295,138	$	265,191

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Contingencies Accounts Receivable and Inventory Balance (Details) (USD $) In Millions, unless otherwise specified	Mar. 30, 2013
Loss Contingencies [Line Items]
Loss Contingency, Range of Possible Loss, Maximum	$ 6.4
Loss Contingency, Estimate of Possible Loss	$ 0.7

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Basis Of Presentation And Accounting Policies (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Mar. 30, 2013 M	Sep. 29, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Liquid investments, maximum maturity period, months	3
Fair value of long-term debt	$ 245.3	$ 256.8
Long-term Debt	$ 250.0	$ 257.5

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Guarantees (Tables)

6 Months Ended

Mar. 30, 2013

Guarantees [Abstract]

Schedule Of Limited Warranty Liability

Below is a table summarizing the activity related to the Company’s limited warranty liability for fiscal 2012 and for the six months endedMarch 30, 2013 (in thousands):

Limited warranty liability, as of October 1, 2011	$	5,453
Accruals for warranties issued during the period	649
Settlements (in cash or in kind) during the period	(957		)
Limited warranty liability, as of September 29, 2012	5,145
Accruals for warranties issued during the period	199
Settlements (in cash or in kind) during the period	(137		)
Limited warranty liability, as of March 30, 2013	$	5,207

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Shareholders' Equity (Details) (USD $)	0 Months Ended	3 Months Ended	6 Months Ended
	Oct. 23, 2012	Mar. 30, 2013	Mar. 30, 2013	Mar. 31, 2012
Stockholders' Equity Note [Abstract]
Committed Payments for Repurchase of Common Stock		$ 700,000
Shares of Common Stock Committed to Purchase		30,243
Stock Repurchase Program, Authorized Amount	50,000,000
Stock Repurchased During Period, Shares		600,000	900,000
Cost of shares repurchased		$ 15,471,000	$ 21,541,000	$ 0
Average price of repurchased shares		$ 25.17	$ 24.56

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Business Combination (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Asset, Amount		$ 4.0
Kontron Design Manufacturing Services [Member]
Business Acquisition [Line Items]
Business acquisition, purchase price of inventory and equipment		34.2
Amortization period of intangible asset acquired, years	2
Annual incremental revenue	$ 100

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Inventories (Schedule Of Inventories) (Details) (USD $)	Mar. 30, 2013	Sep. 29, 2012
Inventory, Net [Abstract]
Raw materials	$ 351,988,000	$ 337,657,000
Work-in-process	56,097,000	47,182,000
Finished goods	76,242,000	72,852,000
Inventory, net	484,327,000	457,691,000
Customer Deposits Related to Inventory [Line Items]
Customer deposits related to inventory	52,700,000	34,800,000
Juniper Networks [Member]
Customer Deposits Related to Inventory [Line Items]
Customer deposits related to inventory	$ 18,100,000

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Inventories

6 Months Ended

Mar. 30, 2013

Inventory, Net [Abstract]

Inventories

INVENTORIES

Inventories are stated at the lower of cost (on a first-in, first-out basis) or market value. The stated cost is comprised of direct materials, labor, and overhead. The major classes of inventories, net of applicable lower of cost or market write-downs, were as follows (in thousands):

	March 30, 2013		September 29, 2012
Raw materials	$	351,988	$	337,657
Work-in-process	56,097		47,182
Finished goods	76,242		72,852
	$	484,327	$	457,691

Per contractual terms, customer deposits are received by the Company to offset obsolete and excess inventory risks. The total amount of customer deposits related to inventory and included within current liabilities on the accompanying Condensed Consolidated Balance Sheets as of March 30, 2013 and September 29, 2012 was $52.7 million and $34.8 million, respectively. Approximately $18.1 million of the inventory customer deposit balance as of March 30, 2013 relates to the previously disclosed disengagement of Juniper Networks, Inc. ("Juniper").

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Property, Plant And Equipment (Schedule Of Property, Plant And Equipment) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2013	Sep. 29, 2012
Property, Plant and Equipment, Net [Abstract]
Land, buildings and improvements	$ 186,761	$ 170,557
Machinery and equipment	305,920	295,548
Computer hardware and software	89,764	85,433
Construction in progress	58,701	39,894
Property, plant and equipment, gross	641,146	591,432
Less: accumulated depreciation	346,008	326,241
Property, plant and equipment, net	$ 295,138	$ 265,191

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Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 30, 2013 Rate	Mar. 31, 2012 Rate	Mar. 30, 2013 Rate	Mar. 31, 2012 Rate
Income Tax Expense (Benefit) [Abstract]
Income tax expense	$ 2,000	$ 2,400	$ 3,000	$ 4,203
Effective tax rates	10.00%	11.00%	8.00%	10.00%

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Condensed Consolidated Statements Of Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Mar. 30, 2013	Mar. 31, 2012
Income Statement [Abstract]
Net sales	$ 557,824	$ 573,470	$ 1,088,356	$ 1,103,124
Cost of sales	505,803	518,846	985,173	996,848
Gross profit	52,021	54,624	103,183	106,276
Selling and administrative expenses	28,833	28,856	58,511	56,746
Operating income	23,188	25,768	44,672	49,530
Other income (expense):
Interest expense	(3,640)	(4,020)	(7,360)	(8,080)
Interest income	383	415	780	898
Miscellaneous	0	228	(475)	(317)
Income before income taxes	19,931	22,391	37,617	42,031
Income tax expense	2,000	2,400	3,000	4,203
Net income	17,975	19,958	34,591	37,828
Earnings per share:
Basic	$ 0.52	$ 0.57	$ 1.01	$ 1.09
Diluted	$ 0.52	$ 0.56	$ 1.00	$ 1.07
Weighted average shares outstanding:
Basic	34,286	34,874	34,253	34,737
Diluted	34,694	35,658	34,673	35,431
Comprehensive income:
Net income	17,975	19,958	34,591	37,828
Derivative instrument fair market value adjustment - net of income tax	1,234	2,065	723	3,659
Foreign currency translation adjustments	(2,035)	342	590	1,177
Comprehensive income	$ 17,174	$ 22,365	$ 35,904	$ 42,664

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Revision Of Prior Period Financial Statements (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Net Cash Provided by (Used in) Operating Activities	$ 62,927	$ 81,956

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Basis Of Presentation And Accounting Policies

6 Months Ended

Mar. 30, 2013

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis Of Presentation And Accounting Policies

BASIS OF PRESENTATION AND ACCOUNTING POLICIES

Basis of Presentation

The accompanying condensed consolidated financial statements included herein have been prepared by Plexus Corp. and its subsidiaries (together “Plexus,” the “Company,” or “we”) without audit and pursuant to the rules and regulations of the United States (“U.S.”) Securities and Exchange Commission (“SEC”). In the opinion of the Company, the accompanying condensed consolidated financial statements reflect all adjustments, which include normal recurring adjustments necessary for the fair statement of the consolidated financial position of the Company as of March 30, 2013 and September 29, 2012, and the results of operations for the three and six months endedMarch 30, 2013 and March 31, 2012, and the cash flows for the same six month periods.

Certain information and footnote disclosures, normally included in financial statements prepared in accordance with generally accepted accounting principles, have been condensed or omitted pursuant to the SEC’s rules and regulations dealing with interim financial statements. However, the Company believes that the disclosures made in the condensed consolidated financial statements included herein are adequate to make the information presented not misleading. It is suggested that these condensed consolidated financial statements be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s 2012 Annual Report on Form 10-K.

The Company’s reportable segments consist of the “Americas” (“AMER”) segment, “Asia-Pacific” (“APAC”) segment and “Europe, Middle East, and Africa” (“EMEA”) segment. Refer to Note 10, "Business Segments," for further details on reportable segments.

Cash and Cash Equivalents

Cash and cash equivalents include highly liquid investments with original maturities of three months or less at the time of purchase and are classified as Level 1 in the fair level hierarchy described below.

Fair Value of Financial Instruments

The Company holds financial instruments consisting of cash and cash equivalents, accounts receivable, accounts payable, debt, derivatives, and capital lease obligations. The carrying values of cash and cash equivalents, accounts receivable, accounts payable, derivatives, and capital lease obligations as reported in the condensed consolidated financial statements approximate fair value. Accounts receivable were reflected at net realizable value based on anticipated losses due to potentially uncollectible balances. Anticipated losses were based on management’s analysis of historical losses and changes in customers’ credit status. The fair value of the Company’s long-term debt was $245.3 million and $256.8 million as of March 30, 2013 and September 29, 2012, respectively. The carrying value of the Company’s long-term debt was $250.0 million and $257.5 million for the periods ended March 30, 2013 and September 29, 2012, respectively. The Company uses quoted market prices when available or discounted cash flows to calculate the fair value of its debt. If measured at fair value in the financial statements, long-term debt (including the current portion) would be classified as Level 2 in the fair value hierarchy described below. Refer to Note 6, "Derivatives and Fair Value Measurements," for further details on derivatives.

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (or exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. The accounting guidance establishes a fair value hierarchy based on three levels of inputs that may be used to measure fair value. The input levels are:

Level 1: Quoted (observable) market prices in active markets for identical assets or liabilities.

Level 2: Inputs other than Level 1 that are observable, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the asset or liability.

Level 3: Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the asset or liability.

Reclassifications

Certain amounts in prior year periods within financing activities on the Consolidated Statements of Cash Flows were reclassified to conform to the current year presentation.

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Derivatives And Fair Value Measurements (Schedule Of Fair Values Of Derivative Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2013	Sep. 29, 2012
Interest Rate Swaps [Member]
Derivatives And Fair Value Measurements [Line Items]
Interest Rate Cash Flow Hedge Derivative at Fair Value, Net	$ (100)	$ (1,700)
Derivatives Designated As Hedging Instruments [Member] | Prepaid Expenses And Other [Member] | Forward Contracts [Member]
Derivatives And Fair Value Measurements [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	358	1,095
Derivatives Designated As Hedging Instruments [Member] | Current Liabilities - Other [Member] | Interest Rate Swaps [Member]
Derivatives And Fair Value Measurements [Line Items]
Interest Rate Cash Flow Hedge Derivative at Fair Value, Net	(62)	(1,715)
Derivatives Designated As Hedging Instruments [Member] | Current Liabilities - Other [Member] | Forward Contracts [Member]
Derivatives And Fair Value Measurements [Line Items]
Derivative liabilities designated as hedging instruments, Fair Value	$ 0	$ 0

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Basis Of Presentation And Accounting Policies Reclassification (Policies)

6 Months Ended

Mar. 30, 2013

Reclassification [Abstract]

Reclassifications [Text Block]

Reclassifications

Certain amounts in prior year periods within financing activities on the Consolidated Statements of Cash Flows were reclassified to conform to the current year presentation.

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Derivatives And Fair Value Measurements (Schedule Of The Effect Of Derivative Instruments On The Condensed Statements Of Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Mar. 30, 2013	Mar. 31, 2012
Interest Rate Swaps [Member]
Derivatives And Fair Value Measurements [Line Items]
Amount of Gain or (Loss) Recognized in Other Comprehensive Income ("OCI") on Derivative (Effective Portion)	$ 1,610	$ (189)	$ 805	$ 15
Forward Contracts [Member]
Derivatives And Fair Value Measurements [Line Items]
Amount of Gain or (Loss) Recognized in Other Comprehensive Income ("OCI") on Derivative (Effective Portion)	(177)	1,772	(98)	2,392
Treasury Rate Locks [Member]
Derivatives And Fair Value Measurements [Line Items]
Amount of Gain or (Loss) Recognized in Other Comprehensive Income ("OCI") on Derivative (Effective Portion)	0	0	0	0
Selling And Administrative Expenses [Member] | Forward Contracts [Member]
Derivatives And Fair Value Measurements [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	179	63	672	(304)
Interest Expense [Member] | Interest Rate Swaps [Member]
Derivatives And Fair Value Measurements [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(62)	(903)	(848)	(1,818)
Other Income (Expense) [Member] | Interest Rate Swaps [Member]
Derivatives And Fair Value Measurements [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	0	0	0	0
Other Income (Expense) [Member] | Forward Contracts [Member]
Derivatives And Fair Value Measurements [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	0	0	0	0
Other Income (Expense) [Member] | Treasury Rate Locks [Member]
Derivatives And Fair Value Measurements [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	0	0	0	0
Interest Income [Member] | Treasury Rate Locks [Member]
Derivatives And Fair Value Measurements [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	$ 81	$ 81	$ 160	$ 160

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Property, Plant And Equipment (Tables)

6 Months Ended

Mar. 30, 2013

Property, Plant and Equipment, Net [Abstract]

Schedule Of Property, Plant And Equipment

Property, plant and equipment consisted of the following categories (in thousands):

	March 30, 2013		September 29, 2012
Land, buildings and improvements	$	186,761	$	170,557
Machinery and equipment	305,920		295,548
Computer hardware and software	89,764		85,433
Construction in progress	58,701		39,894
	641,146		591,432
Less: accumulated depreciation	346,008		326,241
	$	295,138	$	265,191

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Business Combination

6 Months Ended

Mar. 30, 2013

Business Combinations [Abstract]

Business Combination

BUSINESS COMBINATION

In January 2012, Plexus and Kontron AG (“Kontron”) entered into a strategic manufacturing arrangement, and completed the related asset purchase transaction described below. Under this arrangement, Kontron transitioned all manufacturing of its Kontron Design Manufacturing Services (M) Sdn. Bhd. subsidiary (“KDMS”) located in Penang, Malaysia to Plexus facilities in Penang. Plexus acquired the inventory and equipment of KDMS for an adjusted purchase price of $34.2 million, reflecting certain post-closing adjustments, which was paid with cash on-hand, and hired substantially all of KDMS's employees. No real estate was included in this transaction. This transaction has been accounted for as a business combination. The purchase price was allocated primarily to inventory and equipment. An identifiable intangible asset of $4.0 million related to a customer relationship was recorded within other non-current assets in the Company's accompanying Condensed Consolidated Balance Sheets as a result of the arrangement and is being amortized on a straight-line basis over a two year period. Under this arrangement, Kontron also committed to approximately $100 million of incremental revenue annually for two years. Assuming this transaction had been made at the beginning of fiscal 2012, the consolidated pro forma results would not be materially different from reported results.

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Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 30, 2013	Sep. 29, 2012
Current assets:
Cash and cash equivalents	$ 276,507	$ 297,619
Accounts receivable, net of allowances of $1,156 and $1,011, respectively	335,279	323,210
Inventories	484,327	457,691
Deferred income taxes	2,246	2,232
Prepaid expenses and other	22,199	15,785
Total current assets	1,120,558	1,096,537
Property, plant and equipment, net	295,138	265,191
Deferred income taxes	3,771	4,335
Other	41,609	42,136
Total assets	1,461,076	1,408,199
Current liabilities:
Current portion of long-term debt and capital lease obligations	2,893	10,211
Accounts payable	337,694	341,276
Customer deposits	96,778	36,384
Accrued liabilities:
Salaries and wages	34,646	45,450
Other	43,163	46,550
Total current liabilities	515,174	479,871
Long-term debt and capital lease obligations, net of current portion	258,789	260,211
Other liabilities	18,066	19,095
Total non-current liabilities	276,855	279,306
Commitments and contingencies (Note 13)
Shareholders' equity:
Preferred stock, $.01 par value, 5,000 shares authorized, none issued or outstanding	0	0
Common stock, $.01 par value, 200,000 shares authorized, 48,944 and 48,851 shares issued, respectively, and 34,313 and 35,097 shares outstanding, respectively	489	489
Additional paid-in capital	441,208	435,546
Common stock held in treasury, at cost, 14,631 and 13,754 shares, respectively	(421,651)	(400,110)
Retained earnings	631,504	596,913
Accumulated other comprehensive income	17,497	16,184
Total shareholders’ equity	669,047	649,022
Total liabilities and shareholders’ equity	$ 1,461,076	$ 1,408,199

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Litigation

6 Months Ended

Mar. 30, 2013

Litigation [Abstract]

Litigation [Text Block]

LITIGATION

The Company is party to certain other lawsuits in the ordinary course of business. Management does not believe that these proceedings, individually or in the aggregate, will have a material adverse effect on the Company’s consolidated financial position, results of operations or cash flows.

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Document And Entity Information	6 Months Ended
	Mar. 30, 2013	Apr. 29, 2013
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Entity Registrant Name	PLEXUS CORP
Entity Central Index Key	0000785786
Current Fiscal Year End Date	--09-28
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		34,102,634

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Contingencies

6 Months Ended

Mar. 30, 2013

Commitments and Contingencies Disclosure [Abstract]

Contingencies

CONTINGENCIES

As of March 30, 2013, the Company has approximately $6.4 million of outstanding accounts receivables and inventory related to a customer with poor financial health that has failed to make consistent payments. The Company has recorded $0.7 million, the estimated loss it believes is probable, in the allowance for doubtful accounts. The Company has commenced litigation to recover the outstanding accounts receivable balance and costs associated with inventory and open orders for materials required to manufacture the customer's product. The Company is currently working on a payment plan with the customer. Due to uncertainties in the litigation and negotiation processes and the financial health of the customer, however, it is at least reasonably possible that management's estimate of the outcome will change in the future; therefore, such additional loss cannot be estimated at this time.

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Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 30, 2013	Sep. 29, 2012
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 1,183	$ 1,011
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	48,944,000	48,851,000
Common stock, shares outstanding	34,313,000	35,097,000
Treasury stock, shares	14,631,000	13,754,000

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Earnings Per Share

6 Months Ended

Mar. 30, 2013

Earnings Per Share [Abstract]

Earnings Per Share

EARNINGS PER SHARE

The following is a reconciliation of the amounts utilized in the computation of basic and diluted earnings per share (in thousands, except per share amounts):

	Three Months Ended				Six Months Ended
	March 30, 2013		March 31, 2012		March 30, 2013		March 31, 2012
Basic and Diluted Earnings Per Share:
Net income	$	17,975	$	19,958	$	34,591	$	37,828
Basic weighted average common shares outstanding	34,286		34,874		34,253		34,737
Dilutive effect of share-based awards outstanding	408		784		420		694
Diluted weighted average shares outstanding	34,694		35,658		34,673		35,431
Earnings per share:
Basic	$	0.52	$	0.57	$	1.01	$	1.09
Diluted	$	0.52	$	0.56	$	1.00	$	1.07

For both the three and six months endedMarch 30, 2013, stock options and stock-settled stock appreciation rights ("SARS") for approximately 2.3 million shares were not included in the computation of diluted earnings per share because the options’ and stock-settled SARs’ exercise prices were greater than the average market price of the Company's common shares and, therefore, their effect would be anti-dilutive.

For the three and six months endedMarch 31, 2012, stock options and stock-settled stock appreciation rights for approximately 1.0 million and 1.2 million shares, respectively, were not included in the computation of diluted earnings per share because the options' and stock-settled SARs' exercise prices were greater than the average market price of the Company's common shares and, therefore, their effect would be anti-dilutive.

As a result of the Company's stock repurchase program, there were fewer shares outstanding for the three and six month periods ended March 30, 2013 as compared to the three and six month periods ended March 31, 2012. Refer to Note 14, "Shareholders' Equity" for further information on our stock repurchase program.

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Derivatives And Fair Value Measurements

6 Months Ended

Mar. 30, 2013

Derivatives And Fair Value Measurements [Abstract]

Derivatives And Fair Value Measurements

DERIVATIVES AND FAIR VALUE MEASUREMENTS

All derivatives are recognized in the accompanying Condensed Consolidated Balance Sheets at their estimated fair value. The Company currently has cash flow hedges related to variable rate debt and foreign currency obligations. The Company does not enter into derivatives for speculative purposes. Changes in the fair value of the derivatives that qualify as cash flow hedges are recorded in “Accumulated other comprehensive income” in the accompanying Condensed Consolidated Balance Sheets until earnings are affected by the variability of the cash flows.

The Company’s Malaysian operations have entered into forward exchange contracts on a rolling basis with a total notional value of $49.5 million as of March 30, 2013. These forward contracts fix the exchange rates on foreign currency cash used to pay a portion of local currency expenses. The total fair value of these forward contracts was a $0.4 millionasset as of March 30, 2013, and a $1.1 millionasset as of September 29, 2012.

The Company entered into three interest rate swap contracts related to the term loans under its Prior Credit Facility that had an initial total notional value of $150 million and matures on April 4, 2013. These interest rate swap contracts continued into the Credit Facility and pay the Company variable interest at the three month LIBOR rate, and the Company pays the counterparties a fixed interest rate. The fixed interest rates for each of these contracts are 4.415%, 4.490% and 4.435%, respectively. These interest rate swap contracts were originally entered into to convert $150 million of the variable rate term loan under the Prior Credit Facility into fixed rate debt. Based on the terms of the interest rate swap contracts and the underlying debt, these interest rate contracts were determined to be effective, and thus qualify as a cash flow hedge. As such, any changes in the fair value of these interest rate swaps are recorded in “Accumulated other comprehensive income” on the accompanying Condensed Consolidated Balance Sheets until earnings are affected by the variability of cash flows. The total fair value of these interest rate swap contracts was a $0.1 millionliability as of March 30, 2013and a $1.7 million liability as of September 29, 2012. As of March 30, 2013,the total remaining combined notional amount of the Company’s three interest rate swaps was $75.0 million.

The tables below present information regarding the fair values of derivative instruments (as defined in Note 1, "Basis of Presentation and Accounting Policies") and the effects of derivative instruments on the Company’s Condensed Consolidated Financial Statements:

Fair Values of Derivative Instruments
In thousands of dollars
	Asset Derivatives					Liability Derivatives
		March 30, 2013		September 29, 2012			March 30, 2013		September 29, 2012
Derivatives designated as hedging instruments	Balance Sheet Location	Fair Value		Fair Value		Balance Sheet Location	Fair Value		Fair Value
Interest rate swaps		$	—	$	—	Current liabilities – Other	$	62	$	1,715
Forward contracts	Prepaid expenses and other	$	358	$	1,095		$	—	$	—

The Effect of Derivative Instruments on the Condensed Statements of Comprehensive Income
for the Three Months Ended
In thousands of dollars
Derivatives in Cash Flow Hedging Relationships	Amount of Gain or (Loss) Recognized in Other Comprehensive Income (“OCI”) on Derivative (Effective Portion)						Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)						Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)
	March 30, 2013			March 31, 2012				March 30, 2013			March 31, 2012				March 30, 2013		March 31, 2012
Interest rate swaps	$	1,610		$	(189	)	Interest income (expense)	$	(62	)	$	(903	)	Other income (expense)	$	—	$	—
Forward contracts	$	(177	)	$	1,772		Selling and administrative expenses	$	179		$	63		Other income (expense)	$	—	$	—
Treasury Rate Locks	$	—		$	—		Interest income (expense)	$	81		$	81		Other income (expense)	$	—	$	—

The Effect of Derivative Instruments on the Condensed Statements of Comprehensive Income
for the Six Months Ended
In thousands of dollars
Derivatives in Cash Flow Hedging Relationships	Amount of Gain or (Loss) Recognized in Other Comprehensive Income  (“OCI”) on Derivative (Effective Portion)					Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)						Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	Amount of Gain or (Loss) Recognized in Income on  Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)
	March 30, 2013			March 31, 2012			March 30, 2013			March 31, 2012				March 30, 2013		March 31, 2012
Interest rate swaps	$	805		$	15	Interest income (expense)	$	(848	)	$	(1,818	)	Other income (expense)	$	—	$	—
Forward contracts	$	(98	)	$	2,392	Selling and administrative expenses	$	672		$	(304	)	Other income (expense)	$	—	$	—
Treasury Rate Locks	$	—		$	—	Interest income (expense)	$	160		$	160		Other income (expense)	$	—	$	—

During fiscal 2011, the Company entered into treasury rate lock hedge contracts to hedge the variability of the fixed interest rate on

its issuance of $175 million of fixed rate debt using a treasury lock transaction. During the third quarter of fiscal 2011, when the fixed interest rate for the debt issuance was determined, all three treasury rate lock contracts were settled and the Company received proceeds of $2.3 million, which is being amortized over the seven year term of the related debt.

The following table lists the fair values of assets/(liabilities) of the Company’s derivatives as of March 30, 2013, by input level as defined above (in thousands):

Derivatives	Level 1		Level 2			Level 3		Total
Interest rate swaps	$	—	$	(62	)	$	—	$	(62	)
Foreign currency forward contracts	$	—	$	358		$	—	$	358

The fair value of interest rate swaps and foreign currency forward contracts is determined using a market approach which includes obtaining directly or indirectly observable values from third parties active in the relevant markets. The primary input in the fair value of the interest rate swaps is the relevant LIBOR forward curve. Inputs in the fair value of the foreign currency forward contracts include prevailing forward and spot prices for currency and interest rate forward curves.

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Inventories (Tables)

6 Months Ended

Mar. 30, 2013

Inventory, Net [Abstract]

Schedule Of Inventories

The major classes of inventories, net of applicable lower of cost or market write-downs, were as follows (in thousands):

	March 30, 2013		September 29, 2012
Raw materials	$	351,988	$	337,657
Work-in-process	56,097		47,182
Finished goods	76,242		72,852
	$	484,327	$	457,691

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Shareholders' Equity

6 Months Ended

Mar. 30, 2013

Stockholders' Equity Note [Abstract]

Shareholders' Equity

SHAREHOLDERS’ EQUITY

On October 23, 2012, the Board of Directors approved a stock repurchase program under which the Company is authorized to repurchase up to $50 million of its common stock. During the three months endedMarch 30, 2013, the Company repurchased 0.6 million shares for approximately $15.5 million, at an average price of $25.17 per share. For the six months endedMarch 30, 2013, the Company repurchased 0.9 million shares for approximately $21.5 million, at an average price of $24.56 per share. These shares were recorded as treasury stock. As of March 30, 2013, the Company had a commitment of approximately $0.7 million related to the purchase of 30,243 shares, which were purchased before March 30, 2013, but settled after the end of the fiscal second quarter.

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Business Segments

6 Months Ended

Mar. 30, 2013

Segment Reporting [Abstract]

Business Segments

BUSINESS SEGMENTS

Reportable segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker, or group, in assessing performance and allocating resources.

The Company uses an internal management reporting system, which provides important financial data to evaluate performance and allocate the Company’s resources on a regional basis. Net sales for segments are attributed to the region in which the product is manufactured or service is performed. The services provided, manufacturing processes used, class of customers serviced and order fulfillment processes used are similar and generally interchangeable across the segments. A segment’s performance is evaluated based upon its operating income (loss). A segment’s operating income (loss) includes its net sales less cost of sales and selling and administrative expenses, but excludes corporate and other costs, interest expense, other income (loss), and income taxes. Corporate and other costs primarily represent corporate selling and administrative expenses, and restructuring and impairment costs, if any. These costs are not allocated to the segments, as management excludes such costs when assessing the performance of the segments. Inter-segment transactions are generally recorded at amounts that approximate arm’s length transactions. The accounting policies for the regions are the same as for the Company taken as a whole.

Information about the Company’s three reportable segments for the three and six months endedMarch 30, 2013 and March 31, 2012, respectively, follows (in thousands):

	Three Months Ended						Six Months Ended
	March 30, 2013			March 31, 2012			March 30, 2013			March 31, 2012
Net sales:
AMER	$	259,857		$	331,706		$	518,881		$	652,559
APAC	288,269			261,557			560,698			496,263
EMEA	34,942			27,809			63,112			47,271
Elimination of inter-segment sales	(25,244		)	(47,602		)	(54,335		)	(92,969		)
	$	557,824		$	573,470		$	1,088,356		$	1,103,124
Operating income (loss):
AMER	$	16,496		$	26,234		$	35,774		$	49,267
APAC	26,906			21,837			52,106			44,794
EMEA	835			290			613			(600		)
Corporate and other costs	(21,049		)	(22,593		)	(43,821		)	(43,931		)
	$	23,188		$	25,768		$	44,672		$	49,530
Other income (expense):
Interest expense	$	(3,640	)	$	(4,020	)	$	(7,360	)	$	(8,080	)
Interest income	383			415			780			898
Miscellaneous	—			228			(475		)	(317		)
Income before income taxes	$	19,931		$	22,391		$	37,617		$	42,031
	March 30, 2013			September 29, 2012
Total assets:
AMER	$	414,822		$	400,643
APAC	816,392			771,781
EMEA	112,832			88,420
Corporate	117,030			147,355
	$	1,461,076		$	1,408,199

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Stock-Based Compensation

6 Months Ended

Mar. 30, 2013

Share-based Compensation [Abstract]

Stock-Based Compensation

STOCK-BASED COMPENSATION

The Company recognized $3.1 million and $5.9 million of compensation expense associated with stock-based awards for the three and six months endedMarch 30, 2013, respectively, and $3.7 million and $6.4 million for the three and six months endedMarch 31, 2012, respectively.

The Company continues to use the Black-Scholes valuation model to determine the fair value of stock options and stock-settled SARs. The Company uses the fair value at the date of grant to value restricted stock units ("RSUs") and unrestricted stock awards. The Company recognizes stock-based compensation expense over the stock-based awards’ vesting period.

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Income Taxes

6 Months Ended

Mar. 30, 2013

Income Tax Expense (Benefit) [Abstract]

Income Taxes

INCOME TAXES

Income tax expense for the three and six months endedMarch 30, 2013 was $2.0 million and $3.0 million, respectively. The effective tax rates for the three and six months endedMarch 30, 2013 were 9.8 percent and 8.0 percent, respectively. The increase in the effective tax rate for the quarter, compared to current year-to-date, was the result of an assessment from the Internal Revenue Service ("IRS") resulting from an audit of fiscal 2008 through 2010. The decrease in the effective tax rate for the three and six months ended March 30, 2013, as compared to 10.9 percent and 10.0 percent, for the three and six months endedMarch 31, 2012, respectively, was primarily due to an increase in income in the APAC segment, which benefits from reduced taxes due to tax holidays. Also, as demonstrated in recent quarters, the tax rate can vary during the year based on the mix of forecasted earnings by tax jurisdiction.

As of March 30, 2013, there was no material change in the amount of unrecognized tax benefits recorded for uncertain tax positions as compared to fiscal 2012 year end. The Company recognizes accrued interest and penalties related to uncertain tax positions in income tax expense. The amount of interest and penalties recorded for both the three and six months endedMarch 30, 2013 and March 31, 2012 was not material.

It is reasonably possible that a number of uncertain tax positions may be settled within the next 12 months. The Company is currently under examination by taxing authorities in the U.S.; however, the Company is not currently undergoing any tax examinations in any of the foreign jurisdictions in which the Company has significant operations.

The Company maintains valuation allowances when it is more likely than not that all or a portion of a deferred tax asset will not be realized. During the three and six months endedMarch 30, 2013, the Company continued to record a full valuation allowance against its net deferred tax assets in the U.S., Germany and Romania and at a certain entity in the United Kingdom, as it is more likely than not that these assets will not be fully realized based primarily on historical performance. The Company will continue to provide a valuation allowance against its net deferred tax assets in each of the applicable jurisdictions going forward until the need for a valuation allowance is eliminated. The need for a valuation allowance will be eliminated when the Company determines it is more likely than not that the deferred tax assets will be realized.

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Guarantees

6 Months Ended

Mar. 30, 2013

Guarantees [Abstract]

Guarantees

GUARANTEES

The Company offers certain indemnifications under its customer manufacturing agreements. In the normal course of business, the Company may from time to time be obligated to indemnify its customers or its customers’ customers against damages or liabilities arising out of the Company’s negligence, misconduct, breach of contract, or infringement of third party intellectual property rights. Certain agreements have extended broader indemnification, and while most agreements have contractual limits, some do not. However, the Company generally does not provide for such indemnities and seeks indemnification from its customers for damages or liabilities arising out of the Company’s adherence to customers’ specifications or designs or use of materials furnished, or directed to be used, by its customers. The Company does not believe its obligations under such indemnities are material.

In the normal course of business, the Company also provides its customers a limited warranty covering workmanship, and in some cases materials, on products manufactured by the Company. Such warranty generally provides that products will be free from defects in the Company’s workmanship and meet mutually agreed-upon specifications for periods generally ranging from 12 months to 24 months. If a product fails to comply with the Company’s limited warranty, the Company’s obligation is generally limited to correcting, at its expense, any defect by repairing or replacing such defective product. The Company’s warranty generally excludes defects resulting from faulty customer-supplied components, design defects or damage caused by any party or cause other than the Company.

The Company provides for an estimate of costs that may be incurred under its limited warranty at the time product revenue is recognized and establishes additional reserves for specifically identified product issues. These costs primarily include labor and materials, as necessary, associated with repair or replacement and are included in the Company’s accompanying Condensed Consolidated Balance Sheets in other current accrued liabilities. The primary factors that affect the Company’s warranty liability include the value and the number of shipped units and historical and anticipated rates of warranty claims. As these factors are impacted by actual experience and future expectations, the Company assesses the adequacy of its recorded warranty liabilities and adjusts the amounts as necessary.

Below is a table summarizing the activity related to the Company’s limited warranty liability for fiscal 2012 and for the six months endedMarch 30, 2013 (in thousands):

Limited warranty liability, as of October 1, 2011	$	5,453
Accruals for warranties issued during the period	649
Settlements (in cash or in kind) during the period	(957		)
Limited warranty liability, as of September 29, 2012	5,145
Accruals for warranties issued during the period	199
Settlements (in cash or in kind) during the period	(137		)
Limited warranty liability, as of March 30, 2013	$	5,207

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Derivatives And Fair Value Measurements (Narrative) (Details) (USD $)	Mar. 30, 2013	Jan. 01, 2011 Y	Jun. 28, 2008	Apr. 08, 2011 Treasury Rate Lock Hedge Contracts [Member]	Mar. 30, 2013 Interest Rate Swaps [Member]	Sep. 29, 2012 Interest Rate Swaps [Member]	Jun. 28, 2008 Interest Rate Swaps [Member]	Jun. 28, 2008 First Interest Rate Swaps Contracts [Member] Rate	Jun. 28, 2008 Second Interest Rate Swaps Contracts [Member] Rate	Jun. 28, 2008 Third Interest Rate Swaps Contracts [Member] Rate	Mar. 30, 2013 Malaysian Operations [Member] Forward Contracts [Member]	Sep. 29, 2012 Malaysian Operations [Member] Forward Contracts [Member]	Mar. 30, 2013 Senior Notes [Member]	Sep. 29, 2012 Senior Notes [Member]
Derivatives And Fair Value Measurements [Line Items]
Senior Notes													$ 175,000,000	$ 175,000,000
Notional amount of forward exchange contracts											49,500,000
Foreign Currency Contract, Asset, Fair Value Disclosure											400,000	1,100,000
Proceeds from settlement of treasury rate lock contracts				2,300,000
Amortization period of treasury rate lock settlement, years		7
Fixed interest rate								4.415%	4.49%	4.435%
Notional amount of interest rate swap contracts							150,000,000
Conversion of variable rate term loan into fixed rate debt			150,000,000
Interest Rate Cash Flow Hedge Derivative at Fair Value, Net					(100,000)	(1,700,000)
Notional Amount of Interest Rate Cash Flow Hedge Derivatives	$ 75,000,000

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Basis Of Presentation And Accounting Policies (Policy)

6 Months Ended

Mar. 30, 2013

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis Of Presentation

Basis of Presentation

The accompanying condensed consolidated financial statements included herein have been prepared by Plexus Corp. and its subsidiaries (together “Plexus,” the “Company,” or “we”) without audit and pursuant to the rules and regulations of the United States (“U.S.”) Securities and Exchange Commission (“SEC”). In the opinion of the Company, the accompanying condensed consolidated financial statements reflect all adjustments, which include normal recurring adjustments necessary for the fair statement of the consolidated financial position of the Company as of March 30, 2013 and September 29, 2012, and the results of operations for the three and six months endedMarch 30, 2013 and March 31, 2012, and the cash flows for the same six month periods.

Certain information and footnote disclosures, normally included in financial statements prepared in accordance with generally accepted accounting principles, have been condensed or omitted pursuant to the SEC’s rules and regulations dealing with interim financial statements. However, the Company believes that the disclosures made in the condensed consolidated financial statements included herein are adequate to make the information presented not misleading. It is suggested that these condensed consolidated financial statements be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s 2012 Annual Report on Form 10-K.

The Company’s reportable segments consist of the “Americas” (“AMER”) segment, “Asia-Pacific” (“APAC”) segment and “Europe, Middle East, and Africa” (“EMEA”) segment. Refer to Note 10, "Business Segments," for further details on reportable segments.

Description Of Business [Policy Text Block]

Cash And Cash Equivalents

Cash and Cash Equivalents

Cash and cash equivalents include highly liquid investments with original maturities of three months or less at the time of purchase and are classified as Level 1 in the fair level hierarchy described below.

Fair Value Of Financial Instruments

Fair Value of Financial Instruments

The Company holds financial instruments consisting of cash and cash equivalents, accounts receivable, accounts payable, debt, derivatives, and capital lease obligations. The carrying values of cash and cash equivalents, accounts receivable, accounts payable, derivatives, and capital lease obligations as reported in the condensed consolidated financial statements approximate fair value. Accounts receivable were reflected at net realizable value based on anticipated losses due to potentially uncollectible balances. Anticipated losses were based on management’s analysis of historical losses and changes in customers’ credit status. The fair value of the Company’s long-term debt was $245.3 million and $256.8 million as of March 30, 2013 and September 29, 2012, respectively. The carrying value of the Company’s long-term debt was $250.0 million and $257.5 million for the periods ended March 30, 2013 and September 29, 2012, respectively. The Company uses quoted market prices when available or discounted cash flows to calculate the fair value of its debt. If measured at fair value in the financial statements, long-term debt (including the current portion) would be classified as Level 2 in the fair value hierarchy described below. Refer to Note 6, "Derivatives and Fair Value Measurements," for further details on derivatives.

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (or exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. The accounting guidance establishes a fair value hierarchy based on three levels of inputs that may be used to measure fair value. The input levels are:

Level 1: Quoted (observable) market prices in active markets for identical assets or liabilities.

Level 2: Inputs other than Level 1 that are observable, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the asset or liability.

Level 3: Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the asset or liability.

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Earnings Per Share (Tables)

6 Months Ended

Mar. 30, 2013

Earnings Per Share [Abstract]

Schedule Of Reconciliation Of Amounts Utilized In Computation Of Basic And Diluted Earnings Per Share

The following is a reconciliation of the amounts utilized in the computation of basic and diluted earnings per share (in thousands, except per share amounts):

	Three Months Ended				Six Months Ended
	March 30, 2013		March 31, 2012		March 30, 2013		March 31, 2012
Basic and Diluted Earnings Per Share:
Net income	$	17,975	$	19,958	$	34,591	$	37,828
Basic weighted average common shares outstanding	34,286		34,874		34,253		34,737
Dilutive effect of share-based awards outstanding	408		784		420		694
Diluted weighted average shares outstanding	34,694		35,658		34,673		35,431
Earnings per share:
Basic	$	0.52	$	0.57	$	1.01	$	1.09
Diluted	$	0.52	$	0.56	$	1.00	$	1.07

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Business Segments (Schedule Of Financial Information About Company's Reportable Segments) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Mar. 30, 2013	Mar. 31, 2012	Sep. 29, 2012
Segment Reporting Information [Line Items]
Net sales	$ 557,824	$ 573,470	$ 1,088,356	$ 1,103,124
Operating income (loss)	23,188	25,768	44,672	49,530
Interest expense	(3,640)	(4,020)	(7,360)	(8,080)
Interest income	383	415	780	898
Miscellaneous	0	228	(475)	(317)
Income before income taxes	19,931	22,391	37,617	42,031
Total assets	1,461,076		1,461,076		1,408,199
AMER [Member]
Segment Reporting Information [Line Items]
Net sales	259,857	331,706	518,881	652,559
Operating income (loss)	16,496	26,234	35,774	49,267
Total assets	414,822		414,822		400,643
APAC [Member]
Segment Reporting Information [Line Items]
Net sales	288,269	261,557	560,698	496,263
Operating income (loss)	26,906	21,837	52,106	44,794
Total assets	816,392		816,392		771,781
EMEA [Member]
Segment Reporting Information [Line Items]
Net sales	34,942	27,809	63,112	47,271
Operating income (loss)	835	290	613	(600)
Total assets	112,832		112,832		88,420
Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Net sales	(25,244)	(47,602)	(54,335)	(92,969)
Corporate [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	(21,049)	(22,593)	(43,821)	(43,931)
Total assets	$ 117,030		$ 117,030		$ 147,355

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Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Cash flows from operating activities
Net income	$ 34,591	$ 37,828
Adjustments to reconcile net income to cash flows from operating activities:
Depreciation	23,819	24,375
Amortization of intangibles	1,033	346
Gain on sale of property, plant and equipment	(180)	(114)
Deferred income taxes	184	1,598
Stock based compensation expense	5,896	6,384
Changes in operating assets and liabilities, excluding effects of acquisitions
Accounts receivable	(12,241)	(10,583)
Inventories	(27,192)	(10,046)
Prepaid expenses and other	(6,947)	(4,471)
Accounts payable	(4,470)	49,637
Customer deposits	60,555	2,953
Accrued liabilities and other	(12,121)	(15,951)
Cash flows provided by operating activities	62,927	81,956
Cash flows from investing activities
Payments for property, plant and equipment	(53,301)	(32,900)
Proceeds from sales of property, plant and equipment	203	502
Sale of long-term investments	0	2,000
Payments for business acquisition, net of cash acquired	0	(35,246)
Cash flows used in investing activities	(53,098)	(65,644)
Cash flows from financing activities
Payments on debt and capital lease obligations	(8,816)	(8,630)
Purchases of common stock	(21,541)	0
Proceeds from exercise of stock options	116	5,958
Adjustments Related to Tax Withholding for Share-based Compensation	(350)	(310)
Income tax benefit of stock option exercises	0	1,718
Cash flows used in financing activities	(30,591)	(1,264)
Effect of exchange rate changes on cash and cash equivalents	(350)	599
Net (decrease) increase in cash and cash equivalents	(21,112)	15,647
Cash and cash equivalents:
Beginning of period	297,619	242,107
End of period	$ 276,507	$ 257,754

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Debt

6 Months Ended

Mar. 30, 2013

Debt Instruments [Abstract]

Debt

DEBT

On May 15, 2012, the Company entered into a five-year, $250 million senior unsecured credit facility that terminates on May 15, 2017 (the “Credit Facility”). The Credit Facility includes a $160 million revolving credit facility and a $90 million term loan. The revolving credit facility may be increased by $100 million (the "increase option") to $260 million generally by mutual agreement of the Company, the lenders, the letter of credit issuers and the administrative agent named in the related credit agreement (the "Credit Agreement"), subject to certain customary conditions. The Credit Facility was used to refinance the Company's then-existing $100 million senior unsecured revolving credit facility (no amounts were outstanding at that time) and its $150 million senior unsecured term loan (balance of $90.0 million as of May 15, 2012), both of which were scheduled to mature on April 4, 2013 (the “Prior Credit Facility”), and for general corporate purposes. Quarterly principal repayments of the Credit Facility term loan of $3.75 million per quarter began on June 29, 2012 and ended on March 28, 2013. The final $75 million payment is due on May 15, 2017. As of March 30, 2013, the Company had term loan borrowings of $75 million outstanding and no revolving borrowings under the Credit Facility.

The financial covenants (as defined under the Credit Facility) require that the Company maintain, as of each fiscal quarter end, a maximum total leverage ratio and a minimum interest coverage ratio. As of March 30, 2013, the Company was in compliance with all covenants of the Credit Facility. Borrowings under the Credit Facility, at the Company's option, bear interest at a defined base rate or the LIBOR rate plus, in each case, an applicable margin based upon the Company's leverage ratio as defined in the Credit Agreement. Rates would increase upon negative changes in specified Company financial metrics and would decrease upon reduction in the current total leverage ratio to no less than LIBOR plus 1.00% or base rate plus 0%. As of March 30, 2013, the Company had a borrowing rate of LIBOR plus 1.13%. The Company is also required to pay an annual commitment fee on the unused revolver credit commitment based on the Company's leverage ratio; the fee was 0.2% as of March 30, 2013.

In the second quarter of fiscal 2012, the Company incurred approximately $0.9 million in new debt issuance costs in connection with the new Credit Facility, which are being amortized over the five-year term of the Credit Facility.

The Company also has outstanding 5.20% Senior Notes, due on June 15, 2018 (the “Notes”); $175 million principal of the Notes was outstanding as of both March 30, 2013 and September 29, 2012.

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Business Segments(Tables)

6 Months Ended

Mar. 30, 2013

Segment Reporting [Abstract]

Schedule Of Financial Information About Company's Reportable Segments

Information about the Company’s three reportable segments for the three and six months endedMarch 30, 2013 and March 31, 2012, respectively, follows (in thousands):

	Three Months Ended						Six Months Ended
	March 30, 2013			March 31, 2012			March 30, 2013			March 31, 2012
Net sales:
AMER	$	259,857		$	331,706		$	518,881		$	652,559
APAC	288,269			261,557			560,698			496,263
EMEA	34,942			27,809			63,112			47,271
Elimination of inter-segment sales	(25,244		)	(47,602		)	(54,335		)	(92,969		)
	$	557,824		$	573,470		$	1,088,356		$	1,103,124
Operating income (loss):
AMER	$	16,496		$	26,234		$	35,774		$	49,267
APAC	26,906			21,837			52,106			44,794
EMEA	835			290			613			(600		)
Corporate and other costs	(21,049		)	(22,593		)	(43,821		)	(43,931		)
	$	23,188		$	25,768		$	44,672		$	49,530
Other income (expense):
Interest expense	$	(3,640	)	$	(4,020	)	$	(7,360	)	$	(8,080	)
Interest income	383			415			780			898
Miscellaneous	—			228			(475		)	(317		)
Income before income taxes	$	19,931		$	22,391		$	37,617		$	42,031
	March 30, 2013			September 29, 2012
Total assets:
AMER	$	414,822		$	400,643
APAC	816,392			771,781
EMEA	112,832			88,420
Corporate	117,030			147,355
	$	1,461,076		$	1,408,199

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Earnings Per Share (Schedule Of Reconciliation Of Amounts Utilized In Computation Of Basic And Diluted Earnings Per Share) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Mar. 30, 2013	Mar. 31, 2012
Earnings Per Share [Line Items]
Net income	$ 17,975	$ 19,958	$ 34,591	$ 37,828
Basic weighted average common shares outstanding	34,286,000	34,874,000	34,253,000	34,737,000
Dilutive effect of share-based awards outstanding	408,000	784,000	420,000	694,000
Diluted weighted average shares outstanding	34,694,000	35,658,000	34,673,000	35,431,000
Earnings per share, Basic	$ 0.52	$ 0.57	$ 1.01	$ 1.09
Earnings per share, Diluted	$ 0.52	$ 0.56	$ 1.00	$ 1.07
Stock Options [Member]
Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted earnings per share	2,300,000	1,000,000	2,300,000	1,200,000

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New Accounting Pronouncements

6 Months Ended

Mar. 30, 2013

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

New Accounting Pronouncements

NEW ACCOUNTING PRONOUNCEMENTS

In February 2013, the Financial Accounting Standards Board (“FASB”) issued a standard that requires entities to present the changes in the components of accumulated other comprehensive income. Entities are required to present separately the amount of the change that is due to reclassifications, and the amount that is due to current period other comprehensive income. These changes may be shown before or net of tax, and displayed either on the face of the financial statements or in the footnotes. Public entities are required to comply with the standard for annual and interim periods starting with the first interim period in the fiscal period beginning after December 15, 2012. Early adoption is permitted. The Company adopted this guidance as of the second fiscal quarter of 2013 with no impact to the Company's consolidated financial position, results of operations or cash flows, as the guidance only related to the presentation of the Company's financial statement disclosures.

In January 2013, the FASB issued a clarification of its previous amendment to disclosures about offsetting assets and liabilities. The clarification stated which instruments and transactions are subject to the original amendment requiring an entity to disclose information about offsetting and related arrangements to enable users of its financial statements to understand the effects of those arrangements on its financial position. Public entities are required to apply the amendment for annual reporting periods beginning on or after January 1, 2013, and interim periods within those annual periods. An entity should provide the disclosures required by those amendments retrospectively for all comparative periods presented. This guidance will be effective for the Company's 2014 fiscal year and is not expected to have an impact on the Company's consolidated financial position, results of operations or cash flows, as the guidance only relates to the presentation of the Company's financial statement disclosures.

In June 2011, the FASB issued an amendment to comprehensive income guidance, which eliminates the option to present other comprehensive income and its components in the statement of shareholders’ equity. The Company can elect to report components of comprehensive income in either (1) a continuous statement of comprehensive income or (2) two separate but consecutive statements. This guidance is effective for financial statements issued for fiscal years, and interim periods within those years, beginning after December 15, 2011. The Company adopted this guidance as of the first fiscal quarter of 2013 with no impact to the Company's consolidated financial position, results of operations or cash flows, as the guidance only related to the presentation of the Company's financial statement disclosures.