The HBT169M from Kexin is a Silicon Controlled Rectifier with Breakover Voltage 400 V, Breakover Current 8 to 9 A, Gate Trigger Voltage 0.2 to 0.8 V, Gate Trigger Current 50 to 200 uA, Temperature Operating Range -40 to 125 Degree C. Tags: Surface Mount. More details for HBT169M can be seen below.