OEM Carrier Single-Pole Contactor 30 Amp 24V Coil — HN51KC024 for Model PH3ZNB036000AB

This is the genuine OEM factory-authorized replacement contactor for the Carrier PH3ZNB036000AB heat pump / split-system unit. The contactor is the high-voltage relay responsible for energizing the compressor and condenser fan motor every time the thermostat calls for cooling or heating. When the 24V control circuit closes the coil, the contactor pulls in and connects line voltage to the load. A failed contactor is one of the most common reasons an outdoor unit will not start — symptoms include the unit humming with no compressor operation, the system not responding to a thermostat call, or contacts that are visibly pitted, burned, or welded shut.

• Specs: 1-Pole configuration | 30A Full Load Amps (FLA) | 150A Locked Rotor Amps (LRA) | 24 VAC coil voltage | 50/60 Hz | OEM Part # HN51KC024
• OEM vs Generic: Factory Authorized Parts are engineered to meet exact Carrier Corporation specifications for optimum system performance and proven reliability. Generic contactors may use lower-grade contact alloys, increasing the risk of premature pitting and welding 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 disconnecting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Follow the unit wiring diagram for line, load, and 24V coil connections; verify contactor pull-in with a 24V thermostat call after installation.
• Warranty & Shipping: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Fits Carrier model PH3ZNB036000AB. Also widely used across Carrier, Bryant, Payne, and other ICP family residential and light-commercial air conditioning and heat pump units up to 5 tons (60,000 BTU). Always verify the part number against your unit's data plate and parts list before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — contact us today and get your system back online fast.