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Proc-Type: 2001,MIC-CLEAR
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<SEC-DOCUMENT>0001209191-10-010882.txt : 20100219
<SEC-HEADER>0001209191-10-010882.hdr.sgml : 20100219
<ACCEPTANCE-DATETIME>20100219170545
ACCESSION NUMBER:		0001209191-10-010882
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100218
FILED AS OF DATE:		20100219
DATE AS OF CHANGE:		20100219

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HEINZMANN DAVID W
		CENTRAL INDEX KEY:			0001279765

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-20388
		FILM NUMBER:		10620216

ISSUER:		

	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

	BUSINESS ADDRESS:	
		STREET 1:		800 E NORTHWEST HWY
		CITY:			DES PLAINES
		STATE:			IL
		ZIP:			60016
		BUSINESS PHONE:		7088241188

	MAIL ADDRESS:	
		STREET 1:		800 E. NORTHWEST HWY
		CITY:			DES PLAINES
		STATE:			IL
		ZIP:			60016
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>c96678_4x0.xml
<DESCRIPTION>MAIN DOCUMENT DESCRIPTION
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                <transactionFormType>4</transactionFormType>
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    <ownerSignature>
        <signatureName>David W. Heinzmann</signatureName>
        <signatureDate>2010-02-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----