<ARTICLE> 5 <CIK> 0000751978 <NAME> VICOR CORPORATION <MULTIPLIER> 1,000 <CURRENCY> U.S. DOLLARS <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-START> JAN-01-1998 <PERIOD-END> JUN-30-1998 <EXCHANGE-RATE> 1 <CASH> 70,916 <SECURITIES> 0 <RECEIVABLES> 29,390 <ALLOWANCES> 0 <INVENTORY> 29,664 <CURRENT-ASSETS> 133,848 <PP&E> 137,040 <DEPRECIATION> 54,297 <TOTAL-ASSETS> 231,482 <CURRENT-LIABILITIES> 23,079 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 462 <OTHER-SE> 206,089 <TOTAL-LIABILITY-AND-EQUITY> 231,482 <SALES> 84,910 <TOTAL-REVENUES> 84,910 <CGS> 45,323 <TOTAL-COSTS> 45,323 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 14,722 <INCOME-TAX> 5,152 <INCOME-CONTINUING> 9,570 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 9,570 <EPS-PRIMARY> .22 <EPS-DILUTED> .22