Schneider Electric Square D QOB120 Circuit Breaker

QOB120 is a bolt-on miniature circuit breaker from Schneider Electric’s Square D QO family, designed for 1-pole, 20-amp circuits. It is a 120/240 VAC device with a 10 kA interrupt rating, providing reliable overcurrent protection for a single-phase branch circuit installed in compatible Square D panels or enclosures. This unit is thermal-magnetic, offering both overload protection and short-circuit interruption, and it uses bolt-on mounting for secure panel installation. It’s a straightforward choice for protecting standard lighting, receptacle, or small-appliance feeder circuits where a dedicated 20 A, 1P breaker is required. The QOB120 is built for dependable disconnection in residential or light commercial electrical distribution, pairing simple operation with code-compliant circuit protection in bolt-on configurations.