Schneider Electric Square D QOB220 Circuit Breaker

Schneider Electric's Square D QOB220 is a bolt-on, two-pole miniature circuit breaker rated at 20 A for 120/240 V circuits. This QOB-series device provides overload and short-circuit protection with a 10 kA interrupting capacity, designed to fit bolt-on mounting in compatible Square D panels. The two-pole design interrupts both conductors in a 240 V feed, safeguarding downstream outlets, lighting, and appliances by opening the circuit on overcurrent conditions. Its compact form factor and bolt-on mounting create a secure, vibration-resistant installation in enclosures that accept QOB breakers, ensuring reliable protection within a QOB-compatible Square D panel. As part of Schneider Electric's Square D lineup, the QOB220 adheres to the same safety and performance standards that govern 120/240 V branch-circuit protection, and is a common replacement or spare for existing bolt-on installations that require a 20 A, 2-pole device.