STF21N65M5 STF21N65M5 21N65M5 STF21N65M5 MOS(场效应管) STF21N65M5 TK17A65D STF21N65M5(045Y) STF21N65M5-VB STF21N90K5 STF21N90K5 21N90K5 STF21N90K5 MOS(场效应管) STF21N90K5/SADA