Shop Now Square D QOU3401021 – 40A 3 Pole Miniature Circuit Breaker

Designed for advanced control, the QOU340-1021 is a 3-pole, 40A miniature circuit breaker. It is engineered for OEM panels requiring remote shutdown capabilities. This model features a factory-installed 120V AC shunt trip accessory. The unit mount design easily integrates into DIN rail systems and includes box lugs for 14-2 AWG wiring. Providing 10 kAIC at 240VAC, it delivers dependable thermal-magnetic protection. The unit is HACR rated and includes a Visi-Trip visual indicator.