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The QOB330VH is a high-performance Square D 3-pole circuit breaker rated for 30 amps at 240 volts. Designed for bolt-on installation, this breaker offers a robust interrupting capacity of 22kA, ensuring reliable protection for your electrical systems. Perfect for commercial and residential applications, it guarantees safety and durability.
The QOB series uses a bolt-on mounting style, where the breaker is physically bolted to the panel bus, while the standard QO series uses a plug-on (clip-in) design. The QOB330VH cannot be used as a drop-in replacement in a plug-on QO loadcentre — your panel must be specifically designed to accept bolt-on breakers. If you're unsure which type your panel uses, contact us with your panel model and we'll help you identify the correct breaker.
The 'VH' suffix on the QOB330VH designates an enhanced interrupting rating — specifically the 22 kA short-circuit interrupting capacity at 240 V. This higher interrupting rating makes it suitable for installations where available fault current exceeds the standard QOB rating, such as commercial service entrances or panels fed by larger transformers. Always verify that the breaker's interrupting rating meets or exceeds the available fault current at your panel.
Availability of specific Square D QOB variants can vary, and some configurations become difficult to source through standard distribution channels. Northern Breaker Group specializes in exactly this — stocking and sourcing obsolete, discontinued, and hard-to-find breakers across Canada, with counter locations in Calgary, Edmonton, and Vancouver. Contact us for a quote and we'll confirm current availability for the QOB330VH.
