OEM Carrier Single-Pole Contactor 1-Pole 30A 24V Coil for Model PH4GNAB30000AA (HN51KC024)

This is the factory OEM replacement contactor for the Carrier PH4GNAB30000AA packaged heat pump unit. The contactor is a high-voltage relay that opens and closes to send power to the compressor and condenser fan motor every time the thermostat calls for cooling or heating. When the contactor fails — whether from worn contacts, a burned coil, or pitted contact surfaces — the system will either fail to turn on entirely, or run continuously without shutting off. Replacing a failed contactor with this exact OEM part restores factory-matched switching performance and protects the compressor from irregular voltage events.

• Specs: 1-Pole configuration | 24 VAC coil voltage | 30A full load amps (FLA) | 150A locked rotor amps (LRA) | 50/60 Hz | Factory part number HN51KC024
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part engineered to meet exact Carrier Corporation specifications for the PH4GNAB30000AA. Generic contactors may use lighter-gauge contacts that pit faster under high-cycle residential loads, reducing service life and risking compressor damage.
• Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before disconnecting. Verify 24V coil pull-in after installation with thermostat call.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Confirmed fit for Carrier model PH4GNAB30000AA. Also used across Carrier, Bryant, and Payne residential and light-commercial AC and heat pump platforms that specify part number HN51KC024. Always verify the part number against your unit's wiring diagram or parts list before ordering. Have a fitment question? Our team verifies compatibility before you buy — reach out before placing your order.