The STYN208S from Sirectifier Electronics is a Silicon Controlled Rectifier with Breakover Voltage 200 V, Breakover Current 95 to 100 A, Gate Trigger Voltage 1.3 V, Gate Trigger Current 2 to 15 mA, Temperature Operating Range -40 to 125 Degree C. Tags: Through Hole. More details for STYN208S can be seen below.