The MCR225-5HR from Digitron Semiconductors is a Silicon Controlled Rectifier with Breakover Voltage 300 V, Breakover Current 300 A, Gate Trigger Voltage 1.0 to 1.5 V, Gate Trigger Current 25 to 75 mA, Temperature Operating Range -40 to 125 Degree C. Tags: Through Hole. More details for MCR225-5HR can be seen below.