- Monday - Friday 07:00 AM - 04:30 PM
The BDA34045 SQUARE D 3P 45A 480Y/277V 18KA I-Line Circuit Breaker is designed for reliable protection in commercial and industrial applications. With a three-pole configuration and a 45-amp rating, it effectively manages high voltages up to 480Y/277V while offering an 18kA interrupting capacity for optimal safety and performance.
No, they are not interchangeable. The BDA frame is an I-Line plug-in breaker engineered for commercial/industrial Square D I-Line panelboards and switchboards. QO and Homeline (HOM) breakers use entirely different mounting systems designed for residential loadcentres. Using the wrong breaker in a panel it wasn't designed for is unsafe and not code-compliant.
Square D has transitioned many BDA-frame breakers to newer product lines over the years, making certain configurations harder to source through standard channels. Northern Breaker Group specialises in obsolete and hard-to-find breakers — contact us for current stock and lead-time information.
The BDA34045 is rated for 480Y/277V at 18kA. While a breaker rated for a higher voltage can often be applied on a lower-voltage system, you must verify that the interrupting capacity (18kA) meets or exceeds the available fault current at the point of installation on your specific 208V system, and confirm with your authority having jurisdiction (AHJ). Contact our team and we can help clarify the application requirements.
