<SEC-DOCUMENT>0000889331-19-000007-index.html : 20190130
<SEC-HEADER>0000889331-19-000007.hdr.sgml : 20190130
<ACCEPTANCE-DATETIME>20190130065019
ACCESSION NUMBER:		0000889331-19-000007
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		4
CONFORMED PERIOD OF REPORT:	20190130
ITEM INFORMATION:		Results of Operations and Financial Condition
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20190130
DATE AS OF CHANGE:		20190130

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LITTELFUSE INC /DE
		CENTRAL INDEX KEY:			0000889331
		STANDARD INDUSTRIAL CLASSIFICATION:	SWITCHGEAR & SWITCHBOARD APPARATUS [3613]
		IRS NUMBER:				363795742
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1228

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-20388
		FILM NUMBER:		19550346

	BUSINESS ADDRESS:	
		STREET 1:		8755 WEST HIGGINS ROAD
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60631
		BUSINESS PHONE:		773-628-1000

	MAIL ADDRESS:	
		STREET 1:		8755 WEST HIGGINS ROAD
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60631
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>q420188-k.htm
<DESCRIPTION>8-K
<TEXT>
Document 1 - file: q420188-k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>q42018ex991.htm
<DESCRIPTION>EXHIBIT 99.1
<TEXT>
Document 2 - file: q42018ex991.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>lfuselogo1.jpg
<TEXT>
Document 3 - file: lfuselogo1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>lfuslogo2.jpg
<TEXT>
Document 4 - file: lfuslogo2.jpg

</DOCUMENT>
</SEC-DOCUMENT>