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The QOU240 Square D 2P 40A 120/240V Bolt-On / DIN Rail Breaker is a reliable and efficient circuit protection solution. Designed for durability, this two-pole breaker fits easily onto DIN rails for seamless installation. Ideal for residential and commercial applications, it ensures optimal performance while safeguarding your electrical systems.
The QOU series uses a bolt-on / DIN rail mounting style, whereas the standard QO series uses a plug-on connection. While both share the same 120/240V platform and are Square D products, they are not directly interchangeable. The QOU240 must be installed in a panel or enclosure specifically designed to accept bolt-on or DIN rail breakers. If you're unsure which type your panel requires, send us your panel model and we'll help confirm the correct breaker.
Yes. The QOU240 is a 2-pole breaker rated at 40A and 120/240V, making it well suited for double-pole 240V branch circuits — common applications include electric dryers, water heaters, EV chargers, and HVAC equipment. Its 10kA interrupting rating meets typical residential and light commercial fault-current levels in Canada.
Yes — Northern Breaker Group specialises in sourcing obsolete and hard-to-find breakers across Canada, with counter locations in Calgary, Edmonton, and Vancouver. Whether you need the QOU240 for a current installation or as a replacement in an ageing panel, contact us for a quote and we'll confirm availability and lead time.
