OEM Carrier 1-Pole Contactor 30 Amp 24V — HN51KC024 for Model PH12NA03000GAGAA

This is the genuine OEM Carrier contactor (part number HN51KC024), factory-specified for the Carrier PH12NA03000GAGAA packaged unit. The contactor is the high-voltage switching relay that energizes your compressor and fan motor every time the thermostat sends a 24V call for cooling. When the contactor fails — due to pitted or welded contacts, a burned coil, or worn contact springs — the system will either refuse to start entirely, run continuously without shutting off, or produce a loud humming from the control compartment with no compressor engagement.

• Specs: 1-Pole configuration | 24 VAC coil voltage | 30 Amp FLA (Full Load Amps) | 150 Amp LRA (Locked Rotor Amps) | 50/60 Hz | Factory part number HN51KC024
• OEM vs Generic: Genuine Carrier OEM contactors are manufactured to exact factory contact gap, spring tension, and coil resistance tolerances. Generic units may carry ±15% coil pull-in variance, causing nuisance lockouts or premature contact pitting under high-cycle loads.
• Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before opening the control compartment. Photograph all wiring before removing any terminals. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, voltage meter. Verify 24V pull-in after installation with a thermostat call.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Directly fits Carrier model PH12NA03000GAGAA. Also cross-references to P282-0311 and replaces HN51CC024, P282-1304, P282-1305, 301362-101, and 301323-101. Always verify your unit's data plate and wiring diagram before ordering. Our fitment team is available to confirm compatibility before you buy.