<SEC-DOCUMENT>0001104659-18-002948-index.html : 20180119
<SEC-HEADER>0001104659-18-002948.hdr.sgml : 20180119
<ACCEPTANCE-DATETIME>20180119061032
ACCESSION NUMBER:		0001104659-18-002948
CONFORMED SUBMISSION TYPE:	POS AM
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20180119
DATE AS OF CHANGE:		20180119

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:		POS AM
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-221147
		FILM NUMBER:		18535416

	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>POS AM
<SEQUENCE>1
<FILENAME>a18-3448_2posam.htm
<DESCRIPTION>POS AM
<TEXT>
Document 1 - file: a18-3448_2posam.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>a18-3448_2ex5d1.htm
<DESCRIPTION>EX-5.1
<TEXT>
Document 2 - file: a18-3448_2ex5d1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.2
<SEQUENCE>3
<FILENAME>a18-3448_2ex23d2.htm
<DESCRIPTION>EX-23.2
<TEXT>
Document 3 - file: a18-3448_2ex23d2.htm

</DOCUMENT>
</SEC-DOCUMENT>