The T1451N52TOH from Infineon Technologies is a Silicon Controlled Rectifier with Breakover Voltage 5200 V, Breakover Current 43000 A, Gate Trigger Voltage 2.5 V, Gate Trigger Current 1660 A, Temperature Operating Range -40 to 125 Degree C. Tags: Chassis Mount. More details for T1451N52TOH can be seen below.