The SKT 340/18E from Semikron Danfoss is a Silicon Controlled Rectifier with Breakover Voltage 1800 V, Breakover Current 5200 to 5700 A, Gate Trigger Voltage 2 V, Gate Trigger Current 150 mA, Temperature Operating Range -40 to 125 Degree C. Tags: Disc. More details for SKT 340/18E can be seen below.