OEM Carrier Single-Pole Contactor 1-Pole 24V 30A for Model PH12NA04800GAGAA (HN51KC024)

This is the genuine OEM Carrier contactor (part# HN51KC024), the factory-specified high-voltage relay for the Carrier PH12NA04800GAGAA packaged heat pump unit. The contactor acts as the primary electrical switch in the outdoor unit's control circuit — when the thermostat sends a 24V signal, the contactor coil energizes, closes the high-voltage contacts, and delivers power to the compressor and/or condenser fan motor. When the contactor fails, common symptoms include the system not turning on at all, the compressor humming but not starting, contacts welding shut causing the unit to run continuously, or visible pitting and burning on the contact surfaces.

• Specs: 1-Pole configuration | 24 VAC coil voltage | 30A Full Load Amps (FLA) | 150A Locked Rotor Amps (LRA) | 50/60 Hz | OEM Part# HN51KC024
• OEM vs Generic: This genuine Carrier Factory Authorized Part is built to exact factory specifications for the PH12NA04800GAGAA, ensuring proper coil pull-in voltage, contact gap, and amp rating. Generic contactors may use undersized contacts or off-spec coil resistance, leading to premature failure or nuisance tripping.
• Install Difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Always photograph existing wiring before removing any terminals. Verify 24V coil pull-in after installation with a thermostat call.
• Warranty & Shipping: Backed by a 1-year OEM factory warranty. In-stock orders ship same business day from our warehouse.

Compatibility: Confirmed fit for Carrier model PH12NA04800GAGAA packaged heat pump. Also widely used across Carrier, Bryant, and Payne residential and light-commercial AC and heat pump systems rated up to 5 tons (60,000 BTU) that specify HN51KC024 in the official parts list. Always verify your unit's parts list or data plate before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy.