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Bard part number 8615-044BX is an OEM 45 amp, 3 pole circuit breaker used in Bard wall mounted HVAC equipment to help protect the unit wiring and major components by opening the circuit during an overload or short. This is the correct style for applications that require a three pole breaker, so matching the amperage rating and pole count to your unit data label and wiring diagram is critical for a safe, reliable repair. If you are replacing a tripped or damaged breaker, verify the underlying cause such as a compressor issue, shorted wiring, or contactor failure before returning the system to service, and confirm compatibility by cross-referencing your Bard model and serial number in the parts list or service manual.
Bard uses suffixes like "BX" to manage parts internally. These do not change the physical form or function of the part.
A part number ending in "BX" simply means it is packaged in a box for shipping, rather than for internal assembly use.
Example: 8406-142BX is physically identical to 8406-142.