OEM Carrier Single-Pole Contactor 1-Pole 30A 24V for Model PH15NB01800GBAAA (HN51KC024)

This is the factory-authorized OEM replacement contactor for the Carrier PH15NB01800GBAAA heat pump system. The contactor is the high-voltage switching relay that energizes your compressor and condenser fan motor every time the thermostat calls for cooling or heating. When the 24V control circuit closes, the contactor pulls in and delivers line voltage to the load. When it fails — due to pitted or welded contacts, a burned coil, or excessive chattering — your system will either refuse to start, run continuously without shutting off, or hum without pulling the compressor online.

• Specs: 1-Pole configuration | 24 VAC coil voltage | 30A Full Load Amps (FLA) | 150A Locked Rotor Amps (LRA) | 50/60 Hz | Factory OEM part number HN51KC024
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part, engineered to exact specifications for the PH15NB01800GBAAA. Generic aftermarket contactors often use thinner contact materials that arc and pit faster, reducing service life and risking compressor damage from voltage drop at the contacts.
• Install difficulty: 2/5 — Shut off all power at the disconnect and breaker panel before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Always photograph existing wiring before disconnecting terminals. 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: Confirmed for Carrier model PH15NB01800GBAAA. Also used across a wide range of Carrier, Bryant, Payne, and related ICP-family units that specify part number HN51KC024. Always verify the part number against your unit's wiring diagram or data plate before ordering. Our parts specialists are available to confirm fitment — reach out before you order if you have any questions.