Premium Square D Q13100-1021 – 100A 3 Pole Molded Case Circuit Breaker

Built for commercial power distribution, this 100-amp molded case breaker incorporates a 120/240V shunt trip for remote actuation. The three-pole design delivers reliable 10kAIC defense while utilizing the Visi-Trip flag for status checks. It mounts securely into aging Square D NQO and Q1 series panelboards. When transitioning to modern hardware, the QO31001021 acts as the designated factory cross-reference. Lug terminals accept 6 to 1/0 AWG wiring for flexible installation.