0.25 Watt SIP4 & DIP8 Single Output 0.25瓦特学校改善工程 SCR / Diode Discs up to 800V phase control thyristors 0.25瓦特学校改善工程 Power Semiconductors , High Power Semiconductors (eupec) , SCR / Diode Discs , SCR Diode Discs up to 4500V phase control thyristors SCR Diode Discs up to 1400V Fast thyristors 0.25 Watt SIP4 & DIP8 Single Output