The STYN1830 from Sirectifier Electronics is a Silicon Controlled Rectifier with Breakover Voltage 1800 V, Breakover Current 140 to 180 A, Gate Trigger Voltage 1.5 to 2.5 V, Gate Trigger Current 25 to 50 mA, Temperature Operating Range -40 to 125 Degree C. Tags: Through Hole. More details for STYN1830 can be seen below.