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Bard part number 8615-045 is an OEM 50 amp, 3 pole circuit breaker used in the unit electrical/control section on select Bard wall mounted package air conditioners to provide primary overcurrent protection for three phase power circuits. Replacing a weak, tripping, or damaged breaker with the correct Bard-spec component helps protect wiring and critical loads from overloads and faults while maintaining proper system safety and uptime. Always confirm amperage, pole count, and unit model/serial compatibility in your Bard parts manual or wiring diagram before ordering, and follow proper lockout/tagout procedures during installation.