Littelfuse (LFUS) 10-Q 2007 Q3 Quarterly report

EXHIBIT 32.1

Littelfuse, Inc.

Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002,
18 U.S.C. Section 1350

     Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of Section 1350, Chapter 63 of title 18, United States Code), each of the undersigned officers of Littelfuse, Inc. (“the Company”) does hereby certify that to his knowledge:

     The Quarterly Report on Form 10-Q for the period ended September 29, 2007 of the Company fully complies with the requirements of section 13 (a) or 15 (d) of the Securities Exchange Act of 1934, and the information contained in the Form 10-K fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ GORDON HUNTER   Chairman, President and
Chief Executive Officer /s/ PHILIP G. FRANKLIN   Vice President, Operations Support and
Chief Financial Officer