OEM Carrier Single-Pole Contactor 30A 24V Coil — HN51KC024 for Model PH16NA04800GBBAA

This is the factory OEM replacement contactor for the Carrier PH16NA04800GBBAA heat pump condenser. The contactor acts as the high-voltage relay in your system's control circuit: when the thermostat calls for cooling or heating, the 24V control board energizes the contactor coil, which closes the main power contacts and delivers line voltage to the compressor and condenser fan motor. A failed contactor is one of the most common reasons an outdoor unit will not start — symptoms include the unit humming but not turning on, contacts visibly pitted or welded shut, chattering noises from the control panel, or the system running continuously and unable to shut off.

• Specs: 1-Pole | 30A Full Load Amps (FLA) | 150A Locked Rotor Amps (LRA) | 24 VAC coil voltage | 50/60 Hz | OEM Part# HN51KC024
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part, manufactured to exact OEM contact gap, coil pull-in voltage, and arc-suppression specifications. Generic aftermarket contactors vary widely in contact material quality and coil tolerance, which can lead to premature welding under high-load start cycles.
• Install difficulty: 2/5 — Shut off the disconnect and verify zero voltage with a multimeter before touching any terminals. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring before disconnecting. Note low-voltage (24V coil) terminal orientation — it may differ from your original unit's layout.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Direct OEM fit for Carrier model PH16NA04800GBBAA. Also cross-references to Bryant, Payne, and Day & Night units specifying HN51KC024. Verify your unit's data plate and wiring diagram before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — contact us today and get your system back online fast.