CRYDOM B53TP50CH10 Solid State Relay, 90 to 140VAC. More details: Solid State Relay, Max. Output w/Heat Sink 50A, Input Voltage 90 to 140VAC, Voltage Output 48 to 530VAC, Turns On At Random Cross, 3 Phase, Switch Type SCR, Mounting Surface, Finger Safe Yes, Case Color Gray, Standards UL, CE, Includes Thermal Pad