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 Annual Report on Form 10-K for the period ended December 31, 2005 of
the Company (the "Form 10-K") 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                         /s/ PHILIP FRANKLIN
- ------------------------------            --------------------------------------
Chairman, President and                   Vice President, Operations Support and
Chief Executive Officer                   Chief Financial Officer