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Bard part number 8615-030 is an OEM 20 amp, 3 pole circuit breaker rated for 480V, used in Bard wall mount HVAC electrical compartments to provide overcurrent protection and help prevent wiring and component damage during faults or overload conditions. When a breaker is weak, nuisance tripping or failure to reset can interrupt cooling or heating calls, so replacing it with the correct Bard-specified breaker helps maintain proper protection and reliable unit operation. Verify the amperage, pole count, and voltage match your unit data and compare the part number in your Bard parts list to ensure correct fit before ordering.