The MCR100-8 from Slkor Micro Semiconductor is a Silicon Controlled Rectifier with Breakover Voltage 800 V, Breakover Current 11 A, Gate Trigger Voltage 0.8 V, Gate Trigger Current 200 µA, Temperature Operating Range -40 to 125 Degree C. Tags: Through Hole. More details for MCR100-8 can be seen below.