The MCR100-5HR from Digitron Semiconductors is a Silicon Controlled Rectifier with Breakover Voltage 300 V, Breakover Current 10 A, Gate Trigger Voltage 0.62 to 1.2 V, Gate Trigger Current 40 to 200 µA, Temperature Operating Range -40 to 110 Degree C. Tags: Through Hole. More details for MCR100-5HR can be seen below.