<SEC-DOCUMENT>0001437749-18-004812-index.html : 20180316
<SEC-HEADER>0001437749-18-004812.hdr.sgml : 20180316
<ACCEPTANCE-DATETIME>20180316080316
ACCESSION NUMBER:		0001437749-18-004812
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		4
FILED AS OF DATE:		20180316
DATE AS OF CHANGE:		20180316
EFFECTIVENESS DATE:		20180316

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:			1231

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-20388
		FILM NUMBER:		18694234

	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>DEFA14A
<SEQUENCE>1
<FILENAME>lfus20180313_defa14a.htm
<DESCRIPTION>FORM DEFA14A
<TEXT>
Document 1 - file: lfus20180313_defa14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>lfus20180313_defa14aimg003.gif
<TEXT>
Document 2 - file: lfus20180313_defa14aimg003.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>lfus20180313_defa14aimg002.gif
<TEXT>
Document 3 - file: lfus20180313_defa14aimg002.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>lfus20180313_defa14aimg001.gif
<TEXT>
Document 4 - file: lfus20180313_defa14aimg001.gif

</DOCUMENT>
</SEC-DOCUMENT>