<SEC-DOCUMENT>0001047469-17-007641-index.html : 20171213
<SEC-HEADER>0001047469-17-007641.hdr.sgml : 20171213
<ACCEPTANCE-DATETIME>20171213082922
ACCESSION NUMBER:		0001047469-17-007641
CONFORMED SUBMISSION TYPE:	424B3
PUBLIC DOCUMENT COUNT:		5
FILED AS OF DATE:		20171213
DATE AS OF CHANGE:		20171213

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:		424B3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-221147
		FILM NUMBER:		171253044

	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>424B3
<SEQUENCE>1
<FILENAME>a2234056z424b3.htm
<DESCRIPTION>424B3
<TEXT>
Document 1 - file: a2234056z424b3.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g730173.jpg
<DESCRIPTION>G730173.JPG
<TEXT>
Document 2 - file: g730173.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g565682.jpg
<DESCRIPTION>G565682.JPG
<TEXT>
Document 3 - file: g565682.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g130841.jpg
<DESCRIPTION>G130841.JPG
<TEXT>
Document 4 - file: g130841.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g545152.jpg
<DESCRIPTION>G545152.JPG
<TEXT>
Document 5 - file: g545152.jpg

</DOCUMENT>
</SEC-DOCUMENT>