Continue to operate your scr 25TTS12PBF thyristor manufactured from Vishay by applying a forward-biased voltage. This device has a surge current rating of 350 A. Its repetitive peak forward blocking voltage is 1200 V, while its repetitive peak reverse voltage is 1200 V. This SCR thyristor has a minimum operating temperature of -40 °C and a maximum of 125 °C.