EXHIBIT 31.1



                        FORM OF SECTION 302 CERTIFICATION


I, Howard B. Witt, certify that:

         1.       I have reviewed this quarterly report on Form 10-Q of
                  Littelfuse, Inc.;

         2.       Based on my knowledge, this quarterly report does not contain
                  any untrue statement of a material fact or omit to state a
                  material fact necessary to make the statements made, in light
                  of the circumstances under which such statements were made,
                  not misleading with respect to the period covered by this
                  quarterly report;

         3.       Based on my knowledge, the financial statements, and other
                  financial information included in this quarterly report,
                  fairly present in all material respects the financial
                  condition, results of operations and cash flows of the
                  registrant as of, and for, the periods presented in this
                  quarterly report;

         4.       The registrant's other certifying officer and I are
                  responsible for establishing and maintaining disclosure
                  controls and procedures (as defined in Exchange Act Rules
                  13a-14 and 15d-14) for the registrant and have:

                  a)  Designed such disclosure controls and procedures to ensure
                      that material information relating to the registrant,
                      including its consolidated subsidiaries, is made known to
                      us by others within those entities, particularly during
                      the period in which this quarterly report is being
                      prepared;

                  b)  Evaluated the effectiveness of the registrant's disclosure
                      controls and procedures as of a date within 90 days prior
                      to the filing date of the quarterly report (the
                      "Evaluation Date"); and

                  c)  Presented in this quarterly report our conclusions about
                      the effectiveness of the disclosure controls and
                      procedures based on our evaluation as of the Evaluation
                      Date;

         5.       The registrant's other certifying officer and I have
                  disclosed, based on our most recent evaluation, to the
                  registrant's auditors and the audit committee of the
                  registrant's board of directors (or persons performing the
                  equivalent functions):

                  a)  All significant deficiencies in the design or operation of
                      internal controls which could adversely affect the
                      registrant's ability to record, process, summarize and
                      report financial data and have identified for the
                      registrant's auditors any material weaknesses in internal
                      controls; and

                  b)  Any fraud, whether or not material, that involves
                      management or other employees who have a significant role
                      in the registrant's internal controls; and

         6.       The registrant's other certifying officer and I have indicated
                  in this quarterly report whether there were significant
                  changes in internal controls or in other factors that could
                  significantly affect internal controls subsequent to the date
                  of our most recent evaluation, including any corrective
                  actions with regard to significant deficiencies and material
                  weaknesses.


     Dated:  August 12, 2003



                                                       /s/ Howard B. Witt
                                                       -------------------------
                                                       Howard B. Witt
                                                       Chairman, President & CEO