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The FA22045AB Square D 2-Pole 45A 240V AB PH I Line circuit breaker is designed for reliable performance in residential and commercial applications. Featuring a compact design, this breaker ensures optimal protection for your electrical systems. Its durable construction allows for easy installation and long-lasting functionality, making it an essential component for safe operations.
No — the FA frame and QO frame are not interchangeable. The FA22045AB is a molded-case, commercial-grade breaker designed for FA-frame compatible panelboards and switchboards, while QO breakers are a plug-in residential series with a different bus and clip design. Always verify the frame series accepted by your panel before ordering.
The 'AB' suffix on Square D FA-frame breakers designates the breaker's handle and accessory configuration — in this case indicating an 'AB Phase I Line' arrangement. This affects how the breaker mounts and aligns within the panelboard bus, so it's important to match the suffix exactly when sourcing a replacement to ensure proper fit and operation.
Square D FA-frame breakers in certain configurations may be discontinued or hard to source through standard distribution channels. Northern Breaker Group specializes in obsolete and hard-to-find breakers — we maintain extensive inventory and supplier networks across Canada. Contact our Calgary, Edmonton, or Vancouver counters for availability and to request a quote.
