SQUARE D QOU250 Miniature Circuit Breaker 50A 2 Pole 120/240V AC

QOU250 50 A two-pole breaker

The SQUARE D QOU250 is a miniature moulded-case circuit breaker rated at 50 amperes and two poles for 120/240 V AC systems. It provides overcurrent protection and manual switching in residential and commercial panels. UL and CSA verification confirms compliance with published datasheet specifications. The QO series design allows versatile mounting options with a range of compatible accessories.

Panel integration and space saved

The breaker fits standard QO load-centres and occupies two pole positions, freeing adjacent slots for additional circuits. It protects both AC and DC branch circuits without requiring separate devices. Internal magnetic trip elements open the circuit automatically under fault conditions. Accessory compatibility simplifies future upgrades or auxiliary contact additions.

Sustained-load behaviour

Under continuous operation the thermal-magnetic mechanism maintains calibration at the 50 A rating without nuisance tripping. Magnetic strips respond instantly to short-circuit currents while the thermal element handles prolonged overloads. UL and CSA testing validates performance across the full temperature range. The breaker resets manually after a trip, restoring protection without component replacement.