STD3N80K5 STD3N80K5-VB STD3N95K5AG STD3NA50 STD3NA50 MOS(场效应管) STD3NA50-1 STD3NA50T4 STD3NA50T4 FQD3N64C STD3NA50T4FQD3N64C STD3NA50T4-VB