Schneider Electric's Square D QOB340 is a 40-amp, 3-pole bolt-on miniature circuit breaker for 120/240 V systems, rated at 10 kA interrupting capacity. It is part of the QOB bolt-on family and uses a fixed thermal-magnetic trip mechanism to protect branches from overload and faults; installation is bolt-on to compatible enclosures. This 3P breaker provides three-phase protection for residential, commercial, and light industrial panels that run on 120/240 VAC. The QOB340 is a 40 A, 3P, 10 kAIC device in the Square D QOB/QO lineup, referenced by model number QOB340.
