The Square D QOB315 is a 15-amp, three-pole bolt-on miniature circuit breaker designed for 3‑phase circuits in 240 VAC systems. Part of the QO/QOB bolt-on family, it provides thermal-magnetic overcurrent protection with an interrupting capacity of 10 kA at 240 VAC and mounts on compatible Square D panels via bolt-on terminals. Ideal for protecting 3‑phase motors, compressors, and other equipment in commercial or light industrial distributions, this breaker fits panels that accept QOB bolt-on devices and is identified by its QOB315 designation for easy specification in electrical drawings.
