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The QOB3100VH from Square D is a robust 3-pole, 100 Amp circuit breaker designed for 240V systems. With a high interrupting capacity of 22kA, it ensures reliable protection against overloads and short circuits. This bolt-on breaker is ideal for various applications, delivering safety and performance for your electrical needs.
The key difference is the mounting style. The QOB3100VH is a bolt-on breaker, meaning it fastens directly to the bus bar with screws for a more secure connection — typically used in commercial panelboards or QO loadcentres designed for bolt-on devices. The standard QO3100 uses a plug-on connection and is not interchangeable with bolt-on panels. Always verify your panel accepts bolt-on devices before ordering.
Yes. Square D QOB-series breakers are CSA-certified and are commonly used in Canadian commercial and residential electrical installations. The 22kA interrupting capacity meets the short-circuit requirements for most Canadian service entrance and distribution applications, but you should always verify the available fault current at your panel with a qualified electrician to ensure compliance with the Canadian Electrical Code (CEC).
The QOB series has seen limited availability through standard supply channels, making it a hard-to-find item in some markets. Northern Breaker Group specializes in obsolete and hard-to-find breakers, including legacy Square D QO bolt-on devices. Contact us with your panel model and we can source the right replacement or a compatible alternative for your application.
