Exhibit 31.1

                                 CERTIFICATIONS

I, Patrizio Vinciarelli, certify that:

         1.    I have reviewed this quarterly report on Form 10-Q of Vicor
               Corporation;

         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 officers and I are responsible
               for establishing and maintaining disclosure controls and
               procedures (as defined in Exchange Act Rules 13a-15(e) and
               15d-15(e)) for the registrant and we have:

               a) Designed such disclosure controls and procedures, or caused
                  such disclosure controls and procedures to be designed under
                  our supervision, 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 and presented in this report our
                  conclusions about the effectiveness of the disclosure controls
                  and procedures, as of the end of the period covered by this
                  report based on such evaluation; and

               c) Disclosed in this report any change in the registrant's
                  internal control over financial reporting that occurred during
                  the registrant's most recent fiscal quarter that has
                  materially affected, or is reasonably likely to materially
                  affect, the registrant's internal control over financial
                  reporting; and

         5.    The registrant's other certifying officer(s) and I have
               disclosed, based on our most recent evaluation of internal
               control over financial reporting, 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 and material weaknesses in the
                  design or operation of internal control over financial
                  reporting which are reasonably likely to adversely affect the
                  registrant's ability to record, process, summarize and report
                  financial information; and

               b) Any fraud, whether or not material, that involves management
                  or other employees who have a significant role in the
                  registrant's internal control over financial reporting.

Dated:   November 5, 2003                              /s/ Patrizio Vinciarelli
                                                       -------------------------
                                                       Patrizio Vinciarelli
                                                       Chief Executive Officer