Square D QO380 Circuit Breaker

The Square D QO380 is an 80-amp, three-pole plug-in miniature circuit breaker designed for 240-volt circuits, offering a 10 kA interrupting rating to rapidly clear faults in three‑phase systems. As part of the Square D QO family, this molded‑case, plug‑in device mounts in compatible QO panels to provide branch‑circuit protection for each phase. Its 3P configuration ensures simultaneous disconnection of all conductors, reducing the risk of arc and equipment damage on 240 VAC three‑phase feeders. The QO380 is rated specifically for 240 VAC operation, making it suitable for commercial or light industrial distributions that require reliable 80‑amp protection across three inputs. With its plug‑on mounting style and standard QO form factor, it integrates with Square D enclosures and works with other QO accessories designed for coordinated protection and feeder protection schemes. Interruption up to 10,000 amps at 240 volts helps safeguard downstream equipment and wiring, contributing to safer electrical installations and easier maintenance in busy panel setups.