4a sil bridge rectifiers trusemi gbu4m sil bridge rectifier 1000v repetitive peak reverse voltage 4a average forward current 150a peak forward surge current 1v forward voltage 5ua reverse leakage current single phases gbu case 55 to 150c glass passivated junction housed in a plastic package polarity symbols marked on body gbu series trusemi gbu4m bridge rectifier 4a 1000v