The STYN1865 from Sirectifier Electronics is a Silicon Controlled Rectifier with Breakover Voltage 1800 V, Breakover Current 460 to 560 A, Gate Trigger Voltage 1.5 to 1.6 V, Gate Trigger Current 100 to 200 mA, Temperature Operating Range -40 to 125 Degree C. Tags: Through Hole. More details for STYN1865 can be seen below.