The T1851N70TOH from Infineon Technologies is a Silicon Controlled Rectifier with Breakover Voltage 7000 V, Breakover Current 48000 A, Gate Trigger Voltage 2.5 V, Gate Trigger Current 1830 A, Temperature Operating Range -40 to 125 Degree C. Tags: Chassis Mount. More details for T1851N70TOH can be seen below.