White-Rodgers 24A05A-1 Electric Heat Relay

As a seasoned technician, you know that reliability in electric heating control hinges on the quality of your switching components. The White-Rodgers 24A05A-1 is a Level-Temp Silent Operator engineered specifically for the seamless low voltage control of electric heat. This SPST normally open relay uses a thermally actuated bimetal design rather than a traditional magnetic contactor, providing whisper-quiet operation in noise-sensitive residential and commercial environments like bedrooms or offices. Operating at 120 VAC with a built-in 45-second delay, it effectively manages line voltage loads such as baseboard heaters and ceiling cable heaters without the aggressive "click" of standard relays.

The 24A05A-1 electric heat relay is built for durability in the field, featuring a non-critical mounting angle and universal break-off tabs for flexible junction box installation. With a resistive rating of 25A (3000W at 120V) and a motor rating of 16A full load, this unit delivers the heavy-duty performance required by modern electric baseboard heaters. The integrated transformer simplifies your 2-wire thermostat wiring, making it a staple for contractors maintaining older or high-efficiency electric thermal systems.

• Silent Operation: The Level-Temp bimetal mechanism eliminates mechanical noise, perfect for quiet zones.
• Broad Compatibility: Ideal for controlling electric heating systems including baseboard, radiant cable, and infrared heaters.
• Simplified Installation: 18-inch leads and conduit hub mounting facilitate fast retrofits in small enclosures.
• Reliable Thermal Delay: The 45-second delay prevents rapid cycling and reduces stress on the electrical service.
• Proven Industrial Build: Rated for ambient temperatures from -20°F to 140°F, ensuring performance in unconditioned spaces.

Can I use this relay for 240V heaters?
No, the 24A05A-1 is specifically rated for 120 VAC input. For 240V applications, you must use the 24A01G-3 or equivalent high-voltage model.

Why is there a delay after the thermostat calls for heat?
This is a thermally actuated relay. The low voltage circuit powers a small internal heater that expands a bimetal strip to close the contacts. Technical specs indicate an average 45-second delay for activation and cooling.

Is the mounting orientation critical?
One of the primary advantages of this White-Rodgers relay is its non-critical mounting angle, allowing for horizontal, vertical, or angled placement inside the wiring compartment.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.