Square D QOB115K Bolt-On 1-Pole Circuit Breaker

Square D QOB115K Bolt-On 1-Pole Circuit Breaker delivers focused overcurrent protection for 15-amp, 120/240-volt circuits in bolt-on panel installations. This QOB-series breaker is a 1-pole (1P) device rated 15 A with a 10 kA interrupting rating at 120/240 VAC, and it uses a bolt-on mounting scheme designed for use in compatible Square D panels. The “K” designation marks its key-operated mechanism, providing an integrated lock option to prevent unauthorized operation. As part of the Square D QO family, QOB bolt-on breakers pair with QO load centers, NQ and NQOD panelboards, OEM mounting bases, and Speed-D switchboard distribution panels, offering reliable protection for lighting and general branch circuits in residential and light commercial settings.