QOB2125VH – SQUARE D 2P125A 120/240V BOLT ON 22kA BREAKER

The key difference is the mounting style. The QOB2125VH is a bolt-on breaker, meaning it fastens directly to the bus bar with a bolt for a more secure connection — typically required in commercial or industrial QO panelboards. The standard QO2125 uses a plug-on connection and is designed for residential QO loadcentres. They are not interchangeable, so it's important to match the breaker style to your panel's bus design.

The 22kA interrupting capacity (IC) means the QOB2125VH can safely clear a fault current of up to 22,000 amperes without damage to the breaker or panel. For most residential and light commercial service entrances in Canada, this rating is adequate. However, for installations closer to the utility transformer or in high-fault environments, your electrician or engineer should verify the available fault current at the panel to ensure compliance with the Canadian Electrical Code (CEC).

Availability of specific QOB variants can vary, and some configurations become difficult to source through standard distribution channels. Northern Breaker Group specializes in obsolete and hard-to-find breakers across Canada, with counter locations in Calgary, Edmonton, and Vancouver. Contact us for a quote and we'll let you know current stock or sourcing options for the QOB2125VH.