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The QOB345 Square D 3P45A 240V Bolt-On Breaker is designed for durability and reliable performance in your electrical system. This 45 Amp, three-phase breaker provides optimal overload protection and seamless integration into your setup. Ideal for industrial and commercial applications, it ensures safety and efficiency in your operations. Compact and easy to install.
No. The QOB345 is a bolt-on breaker, meaning it bolts mechanically to the bus bar, while the QO345 is a plug-on type. These two mounting styles are not interchangeable — always verify which bus type your panelboard requires before ordering.
Yes. The QOB345 is rated 3-pole, 240V, 45A with a 10kA interrupting capacity, making it appropriate for three-phase branch circuit protection in commercial and light industrial Square D QO bolt-on panelboards. For higher fault-current environments, confirm the available fault current at your panel does not exceed 10kA.
Absolutely. Sourcing obsolete and hard-to-find breakers like the QOB345 is our specialty. We maintain extensive inventory across our Calgary, Edmonton, and Vancouver locations and can source through our supplier network. Contact us for a quote and availability update.
