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The SQDQOB3501021 is a reliable Square D 3-Pole 50 Amp 250V Circuit Breaker equipped with a shunt trip. Ideal for protecting your electrical systems, it ensures optimal performance and safety. Perfect for various applications, this breaker offers durability and peace of mind, making it a must-have for your electrical setup.
The shunt trip accessory allows the breaker to be remotely tripped via an external low-voltage signal — commonly wired to fire alarm systems, emergency stop controls, or building automation systems. When the signal is received, the shunt trip coil actuates and opens the breaker instantly, disconnecting the load.
This is a bolt-on (QOB-frame) breaker, meaning it physically bolts to the bus bar rather than plugging in. It is not interchangeable with Square D's standard plug-in QO breakers. You must confirm your panelboard is designed to accept QOB bolt-on breakers before ordering — our team can help verify compatibility if you provide your panel model.
Availability can vary for breakers with factory-installed accessories like shunt trips, as they are often built to order. Northern Breaker Group specializes in hard-to-find and obsolete Square D breakers across our Calgary, Edmonton, and Vancouver locations. Contact us for a quote and current stock or lead-time information.
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