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The SQDQOB370S is a reliable Square D 3-Phase, 70A circuit breaker rated for 250V. Featuring a built-in shunt trip mechanism, this breaker offers enhanced safety and control, allowing for remote tripping in emergency situations. Ideal for industrial applications, it ensures maximum performance and protection for your electrical systems.
The shunt trip is a built-in coil mechanism that allows the breaker to be tripped remotely via an electrical signal — for example, from a fire alarm system, emergency stop button, or building automation system. When the control voltage is applied to the shunt trip terminals, the breaker immediately opens, cutting power to the circuit. Make sure your control circuit voltage matches the shunt trip coil rating specified on the breaker label before installation.
Yes — the QOB370S is physically compatible with the same bolt-on positions as a standard QOB370, so it can be used as a direct replacement. However, since it includes a shunt trip coil, you'll need to either connect the shunt trip wiring or leave it unused (it will still function as a standard breaker). Always verify your panel's bolt-on breaker spacing and bus compatibility before swapping.
Absolutely — Northern Breaker Group specializes in sourcing obsolete and hard-to-find Square D breakers across Canada. The QOB370S with shunt trip is a less common configuration that may not be readily available through standard channels. Contact us through our website or visit one of our Calgary, Edmonton, or Vancouver counters for a quote and availability check.
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