Schneider Electric QOU340 Molded Case Circuit Breaker

Schneider Electric's Square D QOU340 is a three-pole, 40 A unit-mount miniature molded-case circuit breaker rated for 240 V AC, designed to protect distribution circuits with a 10 kA interrupt rating. The thermal-magnetic design provides overload and short-circuit protection, and the device is UL 489 listed as part of the QOU family for use in residential and commercial panelboards and distribution panels requiring unit-mount MCCB protection. The QOU340 is specifically configured for 240 V operation and is part of Schneider Electric's Square D line, delivering reliable protection in standard electrical installations.