Schneider Electric's Square D QOB3801021 is a 3‑pole molded‑case circuit breaker rated 80 A at 120/240 V AC with a 10 kA interrupting rating. It is designed for bolt‑on mounting in QO‑family panels and features an AC shunt configuration for remote tripping. This 80 A device protects three‑phase circuits in commercial and light‑industrial panelboards, providing overcurrent protection for distribution circuits.
