Siemens 50 A SPNO Solid State Relay, Zero Crossing, Chassis Mount Thyristor, 230 V Maximum Load. Minimum Load Current: 0.5 A. Minimum Load Voltage: 24 V. Minimum Control Voltage: 15 V dc. Maximum Control Voltage: 24 V dc. Terminal Type: Screw. Maximum Turn On Time: 1 (+1/2 cycle) ms. Dimensions: 45 x 48 x 57.6mm. CAD Drawing: 3D CAD Model. Length: 45mm. MPN: 3RF2050-1AA02