OEM Carrier Single-Pole Contactor 30 Amp 24V Coil for Model PH4ANG048000BAAA — Part# HN51KC024

This is the factory-authorized OEM replacement contactor for the Carrier PH4ANG048000BAAA heat pump/condenser unit. The contactor is the high-voltage relay that receives a low-voltage (24V) signal from the thermostat and closes the circuit to energize the compressor and/or condenser fan motor. When the contactor fails — due to worn contacts, pitting, coil burnout, or welded contacts — the system will either fail to start entirely, run continuously without shutting off, or trip the breaker. A failed contactor is one of the most common causes of a no-cooling call in the field.

• Specs: 1-Pole configuration | 24 VAC coil voltage | 30A Full Load Amps (FLA) | 150A Locked Rotor Amps (LRA) | 50/60 Hz | OEM Part# HN51KC024
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part, manufactured to exact OEM tolerances. Generic contactors frequently use undersized contact material that pits and welds faster under load, shortening equipment life and risking compressor damage.
• Install difficulty: 2/5 — Always disconnect and lock out power at both the outdoor disconnect and the breaker panel before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring before removing the old unit. Verify 24V coil pull-in with a thermostat call after installation.
• Warranty: 1-year OEM factory warranty. Orders ship same business day from our warehouse.

Compatibility: Factory-specified contactor for Carrier model PH4ANG048000BAAA (4-ton packaged heat pump). Verify your unit's wiring diagram and parts list confirm part number HN51KC024 before ordering. Not sure? Our HVAC parts specialists verify fitment at no charge — reach out before you buy.