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The BQ3B040 Siemens 3P40A 240V Bolt-On Breaker is designed for superior circuit protection. With a 10kA short-circuit rating, this reliable breaker ensures safety and efficiency in your electrical installations. Ideal for residential or commercial use, it features a compact design for easy integration into your current panel. Trust Siemens for quality performance.
No. The BQ (bolt-on) series physically attaches to the bus bar with screws, while QP breakers clip in. These mounting styles are not interchangeable. The BQ3B040 must be installed in a panelboard specifically designed for bolt-on breakers. If you're unsure which type your panel accepts, share your panel model with us and we'll confirm the correct breaker.
Northern Breaker Group specialises in both current-production and hard-to-find or obsolete breakers. We maintain Canadian counter stock in Calgary, Edmonton, and Vancouver. Contact us for a quote and real-time availability — we'll let you know lead times if the item needs to be sourced.
The BQ3B040 is rated at 240V, which is consistent with single-phase, 3-wire (120/240V) residential and light commercial panels — not a 3-phase (208Y/120V or 600V) system. If your application requires a true 3-phase breaker, a different series and voltage rating would be needed. Contact our team and we'll help identify the right breaker for your system.
