Exhibit 23.1 Consent of Independent Auditors

We consent to the  incorporation  by reference in this Annual Report (Form 10-K)
of Littelfuse,  Inc. of our report dated February 11, 2000, included in the 1999
Annual Report to Stockholders of Littelfuse, Inc.

Our audits also included the financial  statement  schedule of Littelfuse,  Inc.
listed in Item 14(a).  This  schedule  is the  responsibility  of the  Company's
management.  Our responsibility is to express an opinion based on our audits. In
our opinion,  with respect to which the date is February 11, 2000, the financial
statement  schedule  referred to above, when considered in relation to the basic
financial statements taken as a whole,  presents fairly in all material respects
the information set forth therein.

We also consent to the incorporation by reference in the Registration Statements
(No. 33-55942,  33-64442,  33-95020, 333-03260 and 333-64285) on Form S-8 of our
report  dated  February 11, 2000,  with  respect to the  consolidated  financial
statements  incorporated  herein by  reference,  and our report  included in the
preceding paragraph with respect to the financial statement schedule included in
this Annual Report (Form 10-K) of Littelfuse, Inc.




                                                            Ernst & Young LLP
Chicago, Illinois
March 20, 2000