BQ3B050H – SIEMENS 3P50A 240V BOLT ON 22kA BREAKER
The BQ3B050H is a Siemens 3-Pole, 50 Amp, 240V Bolt-On Circuit Breaker designed for maximum durability and performance. With a breaking capacity of 22kA, this reliable breaker ensures safety in your electrical systems. Ideal for both residential and commercial applications, it provides robust protection against overload and short circuits.
The 'B' in BQ3B050H denotes a bolt-on terminal connection, meaning the breaker physically bolts to the bus bar rather than clipping in like a plug-in (QP-series) breaker. Bolt-on breakers provide a more secure mechanical connection and are typically required in commercial panelboards or higher-vibration environments. They are not interchangeable with plug-in loadcentres, so confirm your panel type before ordering.
No — the BQ3B050H is rated for single-phase, 3-wire (240V) systems only, not for 3-phase (208Y/120V or 480V) distribution. Its 3-pole configuration makes it ideal for protecting 240V 3-wire loads such as large motors, sub-panels, or HVAC equipment on a single-phase service. For 3-phase applications, a different breaker rated for that voltage configuration would be required.
Availability can vary as Siemens periodically updates its BQ series lineup. Northern Breaker Group specialises in hard-to-find and obsolete breakers, so even if the BQ3B050H is no longer in current production, we can often source new-old-stock or factory-reconditioned units. Contact our Calgary, Edmonton, or Vancouver counter or request a quote online and our team will advise on availability and lead time.
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