Schneider Electric QOB330 Three-Phase Circuit Breaker

Schneider Electric's Square D QOB330 is a three-pole molded-case circuit breaker rated 30 A at 120/240 V AC, designed for bolt-on installation in QOB-frame panels and panelboards used in commercial and light-industrial electrical distributions. It provides thermal-magnetic protection for 3-phase circuits with a listed interrupt rating of 10 kA at 240 V, meeting UL 489 and CSA requirements, and its bolt-on mounting supports secure, dependable integration into compatible Square D enclosures. The unit accepts conductors from 14 to 10 AWG (copper or aluminum) and uses standard QOB terminals for straightforward terminations, making it suitable for feeders to motors, compressors, pumps, and other three-phase loads in panelboards and load centers. As part of Square D's legacy QOB family from Schneider Electric, the QOB330 provides reliable, code-compliant protection for three-phase circuits, with a compact footprint and compatibility with a range of 3P, 30A protection needs in commercial installations.