BDA34050 SQUARE D 3P 50A 480Y/277V 18KA I LINE

I-Line breakers like the BDA34050 use Square D's proprietary plug-in bus system, where the breaker clips directly onto the I-Line bus bars without separate hardware. This is different from bolt-on breakers, which are mechanically fastened to the bus. The BDA34050 will only fit Square D panelboards and switchboards specifically designed for I-Line plug-in devices. If you're unsure whether your panel is I-Line compatible, share your panelboard model with us and we'll confirm before you order.

Yes — the BDA34050 is rated for 480Y/277V, 3-phase, 3-pole systems, making it well suited for commercial and industrial branch circuit or feeder protection. Its 18kA interrupting capacity covers a wide range of industrial applications. Always verify that your system's available fault current does not exceed 18kA at the point of installation; if higher interrupting capacity is required, we can help source an appropriate alternative.

Absolutely. Sourcing obsolete and hard-to-find Square D breakers like the BDA frame series is a core specialty of Northern Breaker Group. We maintain extensive inventory across our Calgary, Edmonton, and Vancouver locations and have established supplier networks for legacy commercial and industrial breakers. Contact us for a quote and we'll advise on availability or a verified equivalent if needed.