Square D Q0330 Circuit Breaker

Square D QO330 circuit breaker is a 3‑pole, 30‑amp protective device from the QO series designed for 240 V AC applications. It delivers a 10 kA interrupt rating at 240 V and uses a thermal‑magnetic trip to provide reliable overload and short‑circuit protection for three‑phase circuits. Designed for plug‑in installation in Square D QO load centers, this unit is intended to safeguard three‑phase equipment in commercial or light‑industrial panels, such as motors, pumps, and compressors, within 240 V systems. The QO330 is a compact, robust breaker, typically weighing about 0.75 lb, and is compatible with standard QO‑series panel configurations to ensure coordinated protection across the distribution lineup.