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The BQ3B040H SIEMENS 3P 40A 240V Bolt On Circuit Breaker is designed for reliable performance in demanding electrical systems. With a trip capacity of 22kA, it offers superior protection against overloads and short circuits. Ideal for both residential and commercial applications, this breaker ensures safety and peace of mind.
The BQ series uses a bolt-on mounting style, where the breaker is physically bolted to the bus bar — common in commercial panelboards requiring a more secure, vibration-resistant connection. The QP series is a plug-in style used in residential Siemens/ITE loadcentres. The two series are not interchangeable, so it's important to confirm your panel accepts bolt-on breakers before ordering the BQ3B040H.
Availability of specific Siemens BQ-series breakers can vary. Northern Breaker Group specializes in hard-to-find and obsolete breakers across Canada, and we maintain access to new, reconditioned, and surplus stock. Contact our Calgary, Edmonton, or Vancouver locations or request a quote online and we'll advise on current availability.
The BQ3B040H is a 40A, 3-pole branch circuit breaker. While BQ-series bolt-on breakers can serve in various positions within a panelboard, suitability as a main disconnect depends entirely on the panelboard's design and labelling. Always verify with the panel manufacturer's documentation or consult a licensed electrician to confirm the correct application.
