OEM Carrier Single-Pole Contactor 1-Pole 30A 24V Coil for Model PH12NA036000ACAA (HN51KC024)

This is the genuine OEM factory-replacement contactor for the Carrier PH12NA036000ACAA heat pump condensing unit. The contactor is the high-voltage relay that receives a 24V signal from your thermostat and closes the circuit to energize the compressor and condenser fan motor. When it fails, common symptoms include the outdoor unit refusing to start, a loud buzzing or chattering noise from the control compartment, welded or pitted contacts that keep the unit running non-stop, or a visibly burned/melted contact assembly. This is one of the most frequently replaced parts in any HVAC system and should be inspected at every maintenance visit.

• Specs: 1-Pole (single-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 Factory Authorized OEM contactor built to exact Carrier specifications for voltage tolerance, contact material, and coil pull-in reliability. Generic aftermarket contactors may carry looser tolerances and thinner contact silver, leading to premature pitting and compressor stress.
• Install difficulty: 2/5 — Always disconnect and lock out power at the disconnect box before opening the control panel. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring before disconnecting. The coil leads (low-voltage) and line/load terminals (high-voltage) must be reconnected exactly as shown on the unit wiring diagram.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PH12NA036000ACAA. Also cross-references to Carrier part numbers HN51CC024, P282-0311, and P282-1304. Verify your unit's data plate and parts list before ordering. Our team is available to confirm fitment prior to purchase — just reach out before you order and we'll make sure it's right.