Trusted Brand Square D QOB145 – 45A 1 Pole Miniature Circuit Breaker

Part of the renowned QO family, the Square D QOB145 is a 45A, 1-pole miniature circuit breaker. It delivers reliable overcurrent and short-circuit protection for commercial and industrial electrical systems. Designed for a secure fit, this breaker bolts into Square D NQ and NQOD panelboards. The bolt-on mounting style guarantees a tight connection that resists loosening over time in high-vibration environments.