Challenger A120LN-U-20A-120V-1 Circuit Breaker

Challenger A120LN-U-20A-120V-1 is a Type-A miniature circuit breaker that provides 20-amp, 120-volt protection for a single branch circuit in Challenger and Thomas & Betts load centers. This 1-pole device, about 0.5 inches wide, is designed for plug-in installation in compatible Challenger panels and delivers a 10 kA interrupting capacity at 120 V AC, ensuring reliable disconnection during overcurrent events. As part of the A120 family, it offers a compact form factor suitable for protecting 120 V circuits such as lighting and receptacles, with standard thermal-magnetic trip to interrupt overloads. The unit’s compatibility depends on the panel’s designation for Type-A Challenger breakers, so verify that your specific Challenger panel accepts Type-A units before installation. The model is commonly referenced in catalog listings for Challenger’s A120 series as a 20 A, 120 V, 1-pole option and is used to replace older Challenger installations in panels that list Type-A breakers.