-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 ClSCoII7/VOfqkI/X3z6NBNN8lVTh69hTNKv1GPZZjbV2WF3XuayKoOP0G08N4fy
 6QilxRKIQt/MfcehtK0hSQ==

<SEC-DOCUMENT>0001184848-03-000001.txt : 20030612
<SEC-HEADER>0001184848-03-000001.hdr.sgml : 20030612
<ACCEPTANCE-DATETIME>20030611193127
ACCESSION NUMBER:		0001184848-03-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030611
FILED AS OF DATE:		20030612

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MEJIA CARLOS JR
		CENTRAL INDEX KEY:			0001184848

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-25236
		FILM NUMBER:		03741304

	BUSINESS ADDRESS:	
		STREET 1:		1849 FORTUNE DRIVE
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95131
		BUSINESS PHONE:		4039440800

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MICREL INC
		CENTRAL INDEX KEY:			0000932111
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				942526744
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1849 FORTUNE DR
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95131
		BUSINESS PHONE:		4089440800

	MAIL ADDRESS:	
		STREET 1:		1849 FORTUNE DR
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95131
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0101</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-06-11</periodOfReport>
    <issuer>
        <issuerCik>0000932111</issuerCik>
        <issuerName>MICREL INC</issuerName>
        <issuerTradingSymbol>MCRL</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId>
            <rptOwnerCik>0001184848</rptOwnerCik>
            <rptOwnerName>MEJIA CARLOS JR</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>VP Human Resources</officerTitle></reportingOwnerRelationship></reportingOwner><derivativeSecurity><securityTitle><value>Incentive Stock Option Grant</value></securityTitle><conversionOrExercisePrice><value>14.7813</value></conversionOrExercisePrice><transactionDate><value>1999-06-07</value></transactionDate><deemedExecutionDate><value>1999-06-07</value></deemedExecutionDate><transactionCoding><transactionFormType>5</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>33820</value></transactionShares><transactionValue><value>14.7813</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2000-06-07</value><footnoteId id="F1"/></exerciseDate><expirationDate><value>2009-06-27</value></
expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>33820</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>33820</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeSecurity><derivativeSecurity><securityTitle><value>Non Qualified Stock Option Grant</value></securityTitle><conversionOrExercisePrice><value>14.7813</value></conversionOrExercisePrice><transactionDate><value>1999-06-07</value></transactionDate><deemedExecutionDate><value>1999-06-07</value></deemedExecutionDate><transactionCoding><transactionFormType>5</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionSha
res><value>106180</value></transactionShares><transactionValue><value>14.7813</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2000-06-07</value><footnoteId id="F2"/></exerciseDate><expirationDate><value>2009-06-07</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>106180</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>106180</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeSecurity><derivativeSecurity><securityTitle><value>Non Qualfied Stock Option Grant</value></securityTitle><conversionOrExercisePrice><value>10.50</value></conversionOrExercisePrice
><transactionDate><value>2003-05-27</value></transactionDate><deemedExecutionDate><value>2003-06-10</value></deemedExecutionDate><transactionCoding><transactionFormType>5</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>266</value></transactionShares><transactionValue><value>10.50</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2004-05-27</value></exerciseDate><expirationDate><value>2013-05-27</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>266</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>266</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value
></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeSecurity><derivativeSecurity><securityTitle><value>Incentive Stock Option Grant</value></securityTitle><conversionOrExercisePrice><value>10.50</value></conversionOrExercisePrice><transactionDate><value>2003-05-27</value></transactionDate><deemedExecutionDate><value>2003-06-10</value></deemedExecutionDate><transactionCoding><transactionFormType>5</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>1071</value></transactionShares><transactionValue><value>10.50</value></transactionValue><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2004-05-27</value><footnoteId id="F3"/></exerciseDate><expirationDate><value>2013-05-27</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value
></underlyingSecurityTitle><underlyingSecurityShares><value>1071</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>1071</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeSecurity><footnotes><footnote id="F1">Currently 22,056 shares are vested &amp;amp; exercisable.  The remaining unvested shares of 6,764 vest on 6/7/04. </footnote><footnote id="F2">Currently 72,944 shares are vested &amp;amp; exercisable.  The remaining 21,236 shares vest on 6/7/04.</footnote><footnote id="F3">Shares vest 1 on 5/27/04; 267 shares on 5/27/05; 268 on 5/27/06; 267 on 5/27/07 and 268 on 5/27/08.</footnote></footnotes><ownerSignature><signatureName>A.E. Belanger on behalf of Carlos Mejia. Jr.</signatureName><signatureDate>2003-06-11</signatureDate></ownerSignature></ownershipDo
cument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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