Limited Offer Square D A1B3100 – 100A 3 Pole Molded Case Circuit Breaker

Built for commercial and industrial applications, the Square D A1B3100 is a 3-pole, 100A molded case circuit breaker. It delivers reliable thermal-magnetic protection for older electrical distribution systems. This bolt-on unit is specifically designed to install into legacy Square D NA1B panelboards. While the original A1B series is discontinued, it can be replaced by the modern QOB3100 when used with the appropriate retrofit kit.