BJA34045 SQUARE D 3P 45A 480/277V 65KA I LINE

The BJA34045 uses Square D's I-Line plug-in mounting system, which means it installs into Square D I-Line panelboards and switchboards designed for commercial and industrial use. It is not compatible with Square D QO or Homeline residential loadcentres. If you're unsure whether your board accepts I-Line breakers, contact our team with the panel model and we'll confirm.

The BJA frame I-Line series can be difficult to source through standard channels, particularly for older installations. Northern Breaker Group specializes in obsolete and hard-to-find breakers, so we can often locate the BJA34045 when other suppliers cannot. Reach out for a quote and availability check — we serve customers across Calgary, Edmonton, and Vancouver.

No — you must replace a breaker with the exact same amperage rating unless your system has been re-evaluated by a licensed electrician. The BJA34045 is rated specifically for 45A, and swapping in a different amperage without engineering review can void equipment listings and violate the Canadian Electrical Code (CEC). Always confirm the replacement matches the original breaker's amp rating, voltage, and interrupting rating.