Lennox 45H70 Relay

The Lennox 45H70 is a high-performance 3PDT fan control relay designed for precise switching in demanding HVACR applications. Operating on a 24V coil, this three-pole, double-throw component is engineered to manage fans, blowers, and motor circuits in both residential and commercial equipment. It is functionally identical to and replaces the Lennox 45H7001, ensuring a direct-drop replacement for field service. Rated for 10A at 120/240VAC and 5A at 28VDC, this relay provides the robust contact ratings required for Lennox HVAC systems, roof top units (RTUs), and blower delay relay sequences. Its compact design facilitates efficient mounting in control panels where space is limited. Contractors often utilize this 24 volt HVAC relay to restore proper fan timing and multi-point circuit isolation, maintaining system integrity across schools, hospitals, and industrial facilities. This OEM Lennox part helps ensure that electrical contact operation aligns with original manufacturer specifications for safety and performance.

• Direct Replacement: Fully compatible with legacy 45H7001 part numbers for seamless HVAC part installation.
• Versatile Configuration: Features 3PDT (Three Pole, Double Throw) contacts for controlling multiple circuits simultaneously.
• Industrial Grade: Built to withstand high-temperature environments typical of fan control relay applications.
• Broad Compatibility: Fits various Lennox equipment models including CHA16 and GCS16 series units.
• Reliable Switching: 24VAC coil provides consistent actuation for high-cycle motor and blower operations.

Is the 45H70 compatible with 45H7001?
Yes, the 45H70 is the direct OEM replacement for the 45H7001. All electrical specifications and mounting dimensions are identical.

What is the primary application for a 3PDT relay?
In HVACR systems, a 3PDT relay like the 45H70 is typically used for fan control and timing delays, allowing a single 24V signal to switch three separate circuits.

Can this relay be used for DC applications?
While primarily used in 24VAC control circuits, the contact side is rated for 5A at 28VDC, making it suitable for specific DC load-switching requirements.

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.