The MDC160-36io3 from Littelfuse is a Silicon Controlled Rectifier with Breakover Voltage 3600 V, Breakover Current 170 A, Gate Trigger Voltage 1.2 V, Gate Trigger Current 543 A, Temperature Operating Range -40 to 125 Degree C. Tags: Surface Mount. More details for MDC160-36io3 can be seen below.