Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
HEINZMANN DAVID W
   2. Issuer Name and Ticker or Trading Symbol
LITTELFUSE INC /DE [LFUS] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
V.P. and G.M. Automotive Div.
(Last)
(First)
(Middle)
800 EAST NORTHWEST HIGHWAY		 3. Date of Earliest Transaction (Month/Day/Year)
03/15/2006
(Street)

DES PLAINES, IL 60016		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 03/15/2006   A   1,500 (1) A $ 0 2,875 D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (Right to Buy) $ 12.375             11/18/1994 11/18/2008 Common Stock 800   800 D  
Stock Option (Right to Buy) $ 11.625             07/21/1995 07/21/2009 Common Stock 1,800   1,800 D  
Stock Option (Right to Buy) $ 16.125             07/21/1996 07/21/2010 Common Stock 2,000   2,000 D  
Stock Option (Right to Buy) $ 17.812             07/17/1997 07/17/2011 Common Stock 2,000   2,000 D  
Stock Option (Right to Buy) $ 28.875             07/25/1998 07/25/2012 Common Stock 2,500   2,500 D  
Stock Option (Right to Buy) $ 23.25             07/31/1999 07/31/2013 Common Stock 2,500   2,500 D  
Stock Option (Right to Buy) $ 19.75             07/30/2000 07/30/2014 Common Stock 2,500   2,500 D  
Stock Option (Right to Buy) $ 34.62             07/28/2001 07/28/2015 Common Stock 2,500   2,500 D  
Stock Option (Right to Buy) $ 27.5             07/27/2002 07/27/2016 Common Stock 3,000   3,000 D  
Stock Option (Right to Buy) $ 20.34             07/26/2003 07/26/2012 Common Stock 4,000   4,000 D  
Stock Option (Right to Buy) $ 20.24             05/02/2004 05/02/2013 Common Stock 15,000   15,000 D  
Stock Option (Right to Buy) $ 38.11             04/30/2005 05/30/2014 Common Stock 15,000   15,000 D  
Stock Option (Right to Buy) $ 27.21             05/06/2006 05/06/2015 Common Stock 15,000   15,000 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
HEINZMANN DAVID W
800 EAST NORTHWEST HIGHWAY
DES PLAINES, IL 60016		       V.P. and G.M. Automotive Div.  

Signatures

 David W. Heinzmann   03/15/2006
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Represents restricted stock issued with the following vesting dates; 500 shares on January 2, 2007, 500 shares on Janury 2, 2008, and 500 shares on January 2, 2009.

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