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This OEM contactor is the factory-specified high-voltage relay replacement for the Carrier C50A503562 commercial packaged unit. The contactor acts as the primary switching device that connects line-voltage power to the compressor and condenser fan motor whenever the thermostat calls for cooling. When the contactor fails — through worn contact points, a burned coil, or a stuck plunger — the system will either refuse to start entirely, fail to shut off, or run erratically. Replaces OEM part numbers HN53CB115, HN53CD115, and HN53HF122.
Compatibility: Engineered for the Carrier C50A503562 commercial packaged rooftop unit. Cross-references OEM part numbers HN53CB115, HN53CD115, and HN53HF122 — all three part numbers are superseded by this single current-production replacement. Verify your unit's data plate coil voltage and pole configuration before ordering. Our fitment team is available to confirm compatibility before you purchase — no guesswork required.