The TM8050H-8W from STMicroelectronics is a Silicon Controlled Rectifier with Breakover Voltage 800 V, Breakover Current 670 A, Gate Trigger Voltage 1.5 V, Gate Trigger Current 0.05 A, Temperature Operating Range -40 to 150 Degree C. Tags: Through Hole. More details for TM8050H-8W can be seen below.