Square D A1B230 – 30A 2 Pole Molded Case Circuit Breaker Must Have

Part of the legacy A1B series, this 30A, 2-pole molded case circuit breaker delivers reliable thermal-magnetic protection for commercial environments. It is designed to handle 240VAC loads with a 10kAIC interrupting rating. This bolt-on unit installs into discontinued Square D NA1B panelboards. For modern upgrades, it can be replaced by a standard QOB230 breaker when paired with a retrofit kit. The breaker features fixed long-time and instantaneous trip functions, plus a Visi-Trip indicator.