The Square D™ QOB340 is a QO™ bolt-on miniature circuit breaker rated at 40A, 3-pole, for 120/240 VAC systems. Provides 10 kA interrupting capacity with common/thermal magnetic trip. Bolt-on mount design for secure installation in NQOB and NQ panelboards or interiors. Compatible with 3-phase power distribution systems. HACR rated. UL Listed and CSA certified. Suitable for commercial and industrial 3-phase branch circuit protection applications such as motors and 3-phase HVAC equipment in panelboard configurations.
