Image is Representational - See Manufacturer Specs | Solid State Relay w/Heat Sink - 90-140 VAC Control - 45 A Max Load - 48-530 VAC Operating - Zero Voltage - LED Input Status Indicator - DIN Rail Mounting. The CMRA4845 is solid state relay with SCR output for heavy industrial loads. Dimensions of this relay with heat sink are: 3.0 (76.2mm) x 1.75 (44.5mm) x 4.3 (109.2mm).