Schneider Electric's Square D QO370 is a 70-amp, three‑pole molded‑case circuit breaker for plug‑in installation in QO‑series panels. Rated for 120/240 V AC, it provides a 10 kA interrupt rating, giving fast, reliable protection against overcurrent on three‑phase circuits. The QO370 is designed for standard three‑phase loads up to 70 A and uses the QO plug‑in mounting footprint, making it suitable for protecting feeders and branch circuits in residential and commercial panels while maintaining compatibility with existing QO equipment.
