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This OEM replacement contactor is the factory-specified part for the Carrier C50A302761 packaged unit. The contactor is a high-voltage relay that receives a 24V signal from your thermostat and closes the circuit to send line voltage to the compressor and condenser fan motor. When a contactor fails — due to pitted contacts, a burned coil, or a stuck/welded armature — your system will either refuse to start entirely, run continuously without shutting off, or trip the breaker repeatedly. OEM part numbers HN53CB115 and HN53CD115 are both factory-authorized replacements for this application.
Compatibility: Designed specifically for the Carrier C50A302761 commercial packaged unit. Cross-references OEM part numbers HN53CB115 and HN53CD115. Always verify pole count, coil voltage, and amp rating on your existing contactor's label before ordering to confirm fitment. Our parts specialists are available to verify compatibility before you buy — no guesswork required.