Square D QOB390 – 90A 3 Pole Miniature Circuit Breaker Premium

Part of the QO family, this 90A miniature circuit breaker provides thermal-magnetic overcurrent protection for commercial and industrial applications. It is rated for 10kAIC at 240VAC. The three-pole unit mounts into Square D NQ and NQOD panelboards using a secure bolt-on connection. It accepts 4 AWG to 2/0 AWG aluminum or copper wiring via standard box lugs. A built-in Visi-Trip indicator provides immediate visual confirmation of a tripped circuit. The breaker is also HACR rated.