<ARTICLE> 5 <CIK> 0000751978 <NAME> VICOR CORPORATION <MULTIPLIER> 1,000 <CURRENCY> U.S. DOLLARS <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-START> JAN-01-1998 <PERIOD-END> SEP-30-1998 <EXCHANGE-RATE> 1.0 <CASH> 63,241 <SECURITIES> 0 <RECEIVABLES> 28,012 <ALLOWANCES> 0 <INVENTORY> 29,468 <CURRENT-ASSETS> 124,962 <PP&E> 164,142 <DEPRECIATION> 57,259 <TOTAL-ASSETS> 248,482 <CURRENT-LIABILITIES> 33,946 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 463 <OTHER-SE> 206,888 <TOTAL-LIABILITY-AND-EQUITY> 248,482 <SALES> 124,228 <TOTAL-REVENUES> 124,228 <CGS> 67,408 <TOTAL-COSTS> 67,408 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 19,067 <INCOME-TAX> 6,455 <INCOME-CONTINUING> 12,612 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 12,612 <EPS-PRIMARY> .30 <EPS-DILUTED> .29