EXHIBIT 23.1 CONSENT CONSENT OF INDEPENDENT AUDITORS We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (No. 33-55942, 33-64442, 33-95020, 333-03260 and 333-64285) of Littelfuse, Inc. of our report dated April, 18, 2005, relating to the financial statements of HEINRICH INDUSTRIE AG which appears in this Current Report on Form 8-K/A of Littelfuse, Inc. dated April 22, 2005. PwC Westdeutschland AG Wirtschaftsprufungsgesellschaft Essen, April 22, 2005 /s/ Schwarzhof /s/ Poeppelmeyer - ------------------------------- ----------------------- (Schwarzhof) (Poeppelmeyer) Wirtschaftspruefer Wirtschaftspruefer [German Public Auditor] [German Public Auditor]