<ARTICLE> 5 <CIK> 0000751978 <NAME> VICOR CORPORATION <MULTIPLIER> 1,000 <CURRENCY> U.S. DOLLARS <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-START> JAN-01-1999 <PERIOD-END> JUN-30-1999 <EXCHANGE-RATE> 1.0 <CASH> 48,993 <SECURITIES> 0 <RECEIVABLES> 30,572 <ALLOWANCES> 0 <INVENTORY> 28,284 <CURRENT-ASSETS> 112,748 <PP&E> 175,297 <DEPRECIATION> 65,761 <TOTAL-ASSETS> 241,132 <CURRENT-LIABILITIES> 25,915 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 464 <OTHER-SE> 211,550 <TOTAL-LIABILITY-AND-EQUITY> 241,132 <SALES> 86,772 <TOTAL-REVENUES> 86,772 <CGS> 49,283 <TOTAL-COSTS> 49,283 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 11,520 <INCOME-TAX> 3,687 <INCOME-CONTINUING> 7,833 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 7,833 <EPS-BASIC> .19 <EPS-DILUTED> .19