Industrial RC840T-240 Solid State Relay

RC840T-240 is an electromechanical heating relay with a built-in 24 V transformer that powers a low-voltage thermostat while switching 208–240 VAC heating loads. It provides a 22 A resistive load rating at 208/240 VAC (roughly 4.6–5.3 kW depending on line voltage) and includes a built-in transformer to power thermostats from 24 VAC, supporting 24 VAC signals up to 40 mA or 24 VDC up to 35 mA. The compact enclosure measures about 68 mm high by 85 mm wide by 36 mm deep and is designed for 60 Hz systems; it is UL/cULus listed for residential/commercial heating use. It is commonly used to control baseboard heaters and other electric heating loads with a low-voltage thermostat, and supports 2- or 3-wire thermostat configurations.