Schneider Electric 50 A SPNO Solid State Relay, Zero Voltage, Panel Mount SCR, 660 V ac Maximum Load. Minimum Load Current: 0.15 A. Minimum Load Voltage: 48 V ac. Minimum Control Voltage: 4 V dc. Maximum Control Voltage: 32 V dc. Terminal Type: Screw. Maximum Turn On Time: 0.5 cycles. Dimensions: 44.45 x 45.33 x 58.89mm. Depth: 45.33mm. Control Voltage Range: 4 → 32 V dc. MPN: SSP1A450BDS