Carrier HN51KC024 Contactor

The Carrier HN51KC024 is a heavy-duty, single-pole definite purpose contactor designed specifically for HVAC compressor and condenser fan motor switching. Engineered for reliability in residential and light commercial units, this electrical relay features a 24V control coil and a 30 Amp inductive load rating (40 Amp resistive), ensuring it can handle the high-current demands of 1.5 to 5-ton air conditioning and heat pump systems. As a genuine OEM replacement contactor, the HN51KC024 offers a direct fit for older models, effectively reducing downtime by eliminating the need for wiring modifications or bracket adjustments. Its durable construction includes encapsulated coils and silver cadmium oxide contacts to resist pitting and welding under heavy arcing conditions. Technicians rely on this 1 pole 24V contactor to restore consistent power cycling between the thermostat and the outdoor unit, maintaining high system efficiency and preventing premature motor failure caused by sticking or burnt contacts.

Key Benefits:

• Universal Compatibility: Seamlessly replaces multiple part numbers including P282-0311, 3100-15Q228, and HN51CC024 across Carrier, Bryant, and Payne equipment.
• Enhanced Durability: Features an encapsulated coil design that protects against dust, moisture, and environmental debris commonly found in outdoor condensing units.
• High Current Capacity: Rated for 30 FLA (Full Load Amps) and 150 LRA (Locked Rotor Amps) at 240V, providing robust performance for high-tonnage compressors.
• Simplified Installation: Standard mounting bracket and 1/4-inch quick-connect terminals allow for rapid field replacement by service contractors.

Common Questions:

What is the difference between a 1-pole and 2-pole contactor?
A 1-pole contactor like the Carrier HN51KC024 breaks only one side of the power line, whereas a 2-pole contactor breaks both. Single-pole versions are often used in residential units to allow for a constant "trickle" of power to keep the compressor crankcase warm.

Can I use a 40 Amp contactor to replace this 30 Amp model?
Yes, you can typically upgrade to a higher amperage rating (e.g., a 40 Amp P282-1322) as long as the coil voltage remains 24VAC, but you should never downgrade below the original manufacturer's amperage specification.

How do I know if my HN51KC024 contactor is failing?
Common symptoms include a humming or buzzing sound from the control box, visible soot or "pitting" on the silver contacts, or a compressor that won't kick on despite the thermostat calling for cooling.

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.

HN51KC024 is the cross for HN51DB024