Schneider Electric QOU3401042 Circuit Breaker

Schneider Electric's Square D QOU3401042 miniature circuit breaker is a 3-pole, 40 A protection device for 240 V three-phase circuits. Built on the QOU frame, it features a thermal-magnetic trip with shunt-trip capability for remote disconnection, enabling safe interlock with control circuits in protected equipment. With a 10 kA interrupt rating (10 kA @ 120 VAC / 240 VAC listed), it provides fast fault clearing for typical commercial and light-industrial distribution. The unit uses line and load lug terminations, supporting straightforward wiring in panels that accommodate QOU-series breakers. Rated for 240 V operation, it protects conductors and equipment such as motors, fans, and pumps from overloads and short circuits while maintaining a compact form factor in distributed enclosures. The QOU3401042 is part of Square D by Schneider Electric's lineage of miniature circuit breakers, delivering reliable protection and predictable trip characteristics in a three-pole configuration for multi-phase circuits.