Best Choice Square D QOB3901021 – 90A 3 Pole Miniature Circuit Breaker

Built for commercial distribution, the Square D QOB3901021 delivers reliable overcurrent protection with remote tripping capabilities. This 3-pole, 90A miniature circuit breaker features a thermal-magnetic trip mechanism and a 10kAIC rating at 240V. Designed for secure installation, it bolts into Square D NQ and NQOD panelboards. The 1021 suffix indicates a factory-installed 120/240VAC shunt trip, allowing the breaker to be opened remotely. It also includes a Visi-Trip indicator.