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The BJA34090 Square D 3P 90A circuit breaker is designed for reliable performance in commercial and industrial applications. Rated for 480/277V, this 65KA I-Line breaker provides robust overload and short-circuit protection. Ideal for managing electrical distribution, it ensures safety and efficiency for your systems. Perfect for demanding environments.
No — I-Line and QO are completely different mounting systems and are not interchangeable. I-Line breakers like the BJA34090 use a knife-blade plug-in connection designed for Square D I-Line panelboards and switchboards (commercial/industrial). QO breakers use a different plug-on clip and fit QO residential/light-commercial loadcentres. Always verify your panel's bus style before ordering.
Square D BJA-frame I-Line breakers may be difficult to find through standard distribution channels depending on vintage. Northern Breaker Group specialises in obsolete and hard-to-find breakers — we maintain stock of legacy Square D I-Line equipment and can source the BJA34090 new, surplus, or reconditioned. Contact our Calgary, Edmonton, or Vancouver counter for availability.
The BJA34090 is a 90A, 3-pole molded-case breaker suitable for use as a feeder or branch circuit breaker within an I-Line panelboard or switchboard. Whether it can serve as a main breaker depends on the specific panel design, AIC ratings of the assembly, and applicable CEC requirements. We recommend confirming the intended application with your engineer or inspector — our team is happy to help with application questions.
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