OEM Carrier Single-Pole Contactor 24V 30 Amp (HN51KC024) for Model PH12NA04200GAGAA

This OEM single-pole contactor is the factory-specified replacement part for the Carrier PH12NA04200GAGAA heat pump / air conditioning system. The contactor acts as the primary high-voltage relay in the outdoor unit — when the thermostat sends a 24V signal, the contactor energizes its coil and closes the power circuit to the compressor and/or condenser fan motor. A failed contactor is one of the most common causes of an outdoor unit that simply won't turn on, hums but doesn't start, or trips the breaker repeatedly. Pitted, burned, or welded contacts are telltale signs it's time for a replacement.

• Specs: 1-Pole (single-pole) | 24 VAC coil voltage | 30 Amp FLA (Full Load Amps) | 150 Amp LRA (Locked Rotor Amps) | 50/60 Hz | OEM Part # HN51KC024
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part, engineered to exact specifications for the PH12NA04200GAGAA. Generic contactors often use lower-grade contact materials that pit faster under load, leading to premature failure and potential compressor damage.
• Install Difficulty: 2/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring before disconnecting. Verify contactor pull-in with a 24V thermostat call after installation.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Directly fits Carrier model PH12NA04200GAGAA. This part is also used across a broad range of Carrier, Bryant, and Payne residential and light-commercial units rated up to 5 tons (60,000 BTU). Always verify the part number on your unit's wiring diagram or parts list before ordering. Need help confirming fitment? Our HVAC parts team is ready to assist before you buy.