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:

The Annual Report of Form 10-K for the year ended January 3, 2004 of the Company
fully complies, in all material respects, with the requirements of section 13
(a) or 15 (d) of the Securities Exchange Act of 1934, and information contained
in the Form 10-K fairly presents, in all material respects, the financial
condition and results of operations of the Company.

/s/ Howard B. Witt                     /s/ Philip Franklin
- --------------------------------       -----------------------------------
Chairman, President and                 Vice President, Operations Support and
Chief Executive Officer                 Chief Financial Officer