OEM Carrier Single-Pole Contactor 30 Amp 24V Coil for Model PY4GNAA30040AA

This is the genuine OEM factory-specified contactor for the Carrier PY4GNAA30040AA packaged unit. The contactor is the high-voltage relay that connects line-voltage power to the compressor and condenser fan motor every time your thermostat calls for cooling. When the 24V control circuit energizes the coil, the contacts close and your system runs. When it fails — through pitted contacts, a burned coil, or welded tips — your AC may refuse to start, run continuously and fail to shut off, audibly chatter or hum, or short-cycle within seconds of starting. Replacing a failed contactor with the correct OEM part restores factory-matched reliability and protects your compressor from voltage irregularities caused by worn contact surfaces.

• Specs: 1-Pole (single-pole) | 30A FLA (Full Load Amps) | 150A LRA (Locked Rotor Amps) | 24 VAC coil voltage | 50/60 Hz | OEM Part# HN51KC024
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part engineered to exact unit specifications. Generic contactors may differ in contact gap, coil impedance, and terminal layout — increasing risk of arcing, premature failure, and compressor damage over time.
• Install difficulty: 2/5 — Always disconnect and lock out power at the disconnect box before opening the control compartment. Photograph all wiring before removal. Transfer line, load, and 24V coil leads one at a time. Verify contactor pull-in with a 24V call from the thermostat after installation. Tools needed: flat-head screwdriver, needle-nose pliers, multimeter.
• Warranty: 1-year OEM factory warranty. In stock — ships same business day from our warehouse.

Compatibility: Engineered for the Carrier PY4GNAA30040AA packaged unit and other Carrier, Bryant, and Payne models specifying OEM part number HN51KC024. Always cross-reference your unit's wiring diagram and data plate before ordering. Have a fitment question? Our HVAC parts specialists verify compatibility before you buy — contact us today.