QOB240VH – SQUARE D 2P40A 120/240V BOLT ON 22kA BREAKER
The QOB240VH by Square D is a high-performance 2-pole circuit breaker rated at 40A, designed for 120/240V applications. With a robust interrupting capacity of 22kA, this bolt-on breaker offers reliable protection for your electrical systems. Ideal for residential or commercial use, it combines safety and efficiency in one compact unit.
The key difference is the mounting style. The QOB240VH is a bolt-on breaker, meaning it fastens mechanically to the bus bar with a screw, while the QO240 uses Square D's plug-on design. They are not interchangeable — always verify your panelboard accepts bolt-on (QOB) breakers before ordering.
The 'VH' suffix designates a higher interrupting rating. The QOB240VH is rated at 22kA AIC (Ampere Interrupting Capacity), compared to the standard 10kA rating on base QOB models. This makes it suitable for installations where the available fault current exceeds 10kA — common in commercial settings or locations close to utility transformers.
Availability can vary, and some QOB-series variants 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 work to get you the QOB240VH as quickly as possible.
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