The 1000PB180 from RIR Power Electronics is a Silicon Controlled Rectifier with Breakover Voltage 1800 V, Breakover Current 17800 A, Gate Trigger Voltage 1.8 to 3.0 V, Gate Trigger Current 100 to 200 mA, Temperature Operating Range -40 to 125 Degree C. Tags: Disc. More details for 1000PB180 can be seen below.