Square D QOB335 N Three-Phase Circuit Breaker

Square D QOB335N is a three-pole, 35-amp, 120/240 V AC bolt-on molded-case circuit breaker in the QOB family, offering 10 kA (RMS) interrupting capacity at 240 V. It accepts 14-8 AWG conductors and employs a thermal-magnetic trip mechanism to protect three-phase circuits from overcurrent, short circuits, and overloads. The bolt-on mounting is intended for QOB-series enclosures, providing a sturdy, field-replaceable protection device in commercial and light-industrial electrical distributions. Typical applications include safeguarding three-phase motors, pumps, compressors, conveyors, and similar equipment on branch circuits up to 35 A, as well as general distribution wiring where a 35 A protection level is required. This specific size and configuration—35 A, 3-pole, 120/240 V AC, 10 kA interrupting capacity—enables engineers to match protection to circuit load while preserving panel space and ensuring compatibility with existing Square D QOB components.