Image is Representational - See Manufacturer Specs | Solid State Relay - 3 Switched Channels - 4-32 VDC Control Voltage Range - 25 A Maximum Load Current - 48-530 VAC Operating Voltage Range - Zero Voltage Turn-On - Panel Mount. The D53TP25D is solid state relay with SCR output for heavy industrial loads. Dimensions of this relay are: 4.09 (103.8mm) x 2.89 (73.4mm) x 1.18 (30.0mm).