Square D A1B250 Bolt-On Two-Pole Circuit Breaker

Square D A1B250 is a bolt-on, two-pole molded-case circuit breaker from the A1B family, rated for 50 A at 240 V, single-phase service, and designed for use in panelboards that accept A1B bolt-on breakers. It provides thermal-magnetic overcurrent protection with a 10 kA short-circuit current rating at 240 V, and uses molded-case construction suitable for durability in commercial and light-industrial electrical distributions. The bolt-on mounting supports secure installation in compatible Square D panels, and the A1B250 designation identifies its 50 A amperage, 240 V voltage rating, and bolt-on format. When replacing or upgrading, verify that the target panel is compatible with A1B bolt-on breakers to ensure proper fit and electrical clearance.