EXHIBIT 32.1

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the quarterly report of Bel Fuse Inc (the "Company") on Form
10-Q for the quarter ended March 31, 2004 filed with the Securities and Exchange
Commission (the "Report"), I, Daniel Bernstein, President and Chief Executive
Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) of the
Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material
respects, the consolidated financial condition of the Company as of the dates
presented and consolidated result of operations of the Company for the periods
presented.

Dated: May 7, 2004

                                        By: /s/ Daniel Bernstein
                                            ---------------------------
                                            Daniel Bernstein, President
                                            and Chief Executive Officer