The MDC500-36io7 from Littelfuse is a Silicon Controlled Rectifier with Breakover Voltage 3600 V, Breakover Current 500 A, Gate Trigger Voltage 1.079 V, Gate Trigger Current 1181 A, Temperature Operating Range -40 to 125 Degree C. Tags: Surface Mount. More details for MDC500-36io7 can be seen below.