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The QOB220GFI Square D 2P20A 120/240V Bolt-In Breaker is a reliable GFCI circuit breaker designed for maximum safety. It features a 5mA trip current for sensitive applications, making it ideal for wet areas like hot tubs. Ensure protection against ground faults while easily fitting into your electrical panel.
The key difference is the mounting style. The QOB220GFI uses a bolt-on connection to secure it firmly to the bus bar, making it suited for commercial panelboards where vibration resistance or code requirements call for bolt-on breakers. The QO220GFI is a plug-on version intended for residential QO loadcentres. The two are not interchangeable, so it's important to confirm which bus style your panel requires.
The 5mA ground-fault trip level is the Class A GFCI sensitivity mandated by the Canadian Electrical Code (CEC) and the NEC for personnel protection. It is specifically required for wet or damp locations such as hot tubs, spas, bathrooms, kitchens, garages, and outdoor circuits. The 5mA threshold detects leakage currents too small to trip a standard breaker but large enough to be lethal, providing a critical additional layer of protection.
Availability of specific GFCI breaker models can change over time as manufacturers update their product lines. Northern Breaker Group specializes in hard-to-find and obsolete breakers and maintains access to both new-old-stock and reconditioned inventory across Canada (Calgary, Edmonton, and Vancouver). Contact us with your required quantity and we'll confirm current stock or source it for you.
