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This is the factory-specified OEM replacement contactor for the Carrier C50A502061 packaged unit. The contactor is a high-voltage relay controlled by a low-voltage (24V) signal from the thermostat or control board. When the thermostat calls for cooling, the 24V coil energizes and the contactor closes, sending line voltage to the compressor and condenser fan motor. A failed contactor is one of the most common reasons an air conditioning system won't turn on — symptoms include a clicking or buzzing sound with no compressor startup, burnt or pitted contact points, or a system that runs continuously without shutting off.
Compatibility: Designed for the Carrier C50A502061 commercial packaged unit. Cross-references OEM part numbers HN53CB115 and HN53CD115. Confirm coil voltage and pole configuration on your existing contactor's label before ordering. Our fitment team is available to verify compatibility prior to purchase — same-day shipping available on in-stock units.