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The Square D QO140 Miniature Circuit Breaker, MPN QO140, offers essential overcurrent protection for electrical systems. This one-pole breaker is rated for forty amps at 120/240 volts, designed specifically for plug-in mounting. The QO140 circuit breaker features a trip-free toggle mechanism allowing easy operation with positive handle indication. Its VisiTrip functionality provides a clear visual alert when the breaker has tripped, facilitating quick response times in fault conditions.
The QO series circuit breaker is UL Listed and CSA Certified, ensuring compliance with safety standards.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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