The STYN210S from Sirectifier Electronics is a Silicon Controlled Rectifier with Breakover Voltage 200 V, Breakover Current 100 to 105 A, Gate Trigger Voltage 1.5 V, Gate Trigger Current 15 mA, Temperature Operating Range -40 to 125 Degree C. Tags: Through Hole. More details for STYN210S can be seen below.