Challenger NSB A2030 is a 30-ampere, two-pole miniature circuit breaker (MCB) designed for 120/240V AC circuits in residential and light commercial panels. This plug-in Type A MCB fits a 1-inch-wide slot in Challenger and Thomas & Betts load centers and delivers up to 10 kA of short-circuit interruption at 240V. With its two-pole construction, it simultaneously disconnects both hot conductors on a 240V circuit, providing reliable branch-circuit protection for lighting, outlets, and small-appliance circuits. The A2030 designation denotes a standard Challenger replacement (2P, 30A, 120/240V, 10kA, plug-in) used in compatible Challenger Type A panels.
