<SEC-DOCUMENT>0001047469-17-006577-index.html : 20171026
<SEC-HEADER>0001047469-17-006577.hdr.sgml : 20171026
<ACCEPTANCE-DATETIME>20171026165607
ACCESSION NUMBER:		0001047469-17-006577
CONFORMED SUBMISSION TYPE:	S-4
PUBLIC DOCUMENT COUNT:		6
FILED AS OF DATE:		20171026
DATE AS OF CHANGE:		20171026

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:		S-4
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-221147
		FILM NUMBER:		171156882

	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>S-4
<SEQUENCE>1
<FILENAME>a2233127zs-4.htm
<DESCRIPTION>S-4
<TEXT>
Document 1 - file: a2233127zs-4.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.2
<SEQUENCE>2
<FILENAME>a2233127zex-23_2.htm
<DESCRIPTION>EX-23.2
<TEXT>
Document 2 - file: a2233127zex-23_2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.3
<SEQUENCE>3
<FILENAME>a2233127zex-23_3.htm
<DESCRIPTION>EX-23.3
<TEXT>
Document 3 - file: a2233127zex-23_3.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.3
<SEQUENCE>4
<FILENAME>a2233127zex-99_3.htm
<DESCRIPTION>EX-99.3
<TEXT>
Document 4 - file: a2233127zex-99_3.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g730173.jpg
<DESCRIPTION>G730173.JPG
<TEXT>
Document 5 - file: g730173.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g545152.jpg
<DESCRIPTION>G545152.JPG
<TEXT>
Document 6 - file: g545152.jpg

</DOCUMENT>
</SEC-DOCUMENT>