Industrial A120L Single Pole 120V 20A Circuit Breaker

Challenger A120L is a 1-pole, 20 A, 120 V molded-case circuit breaker designed for plug-in installation in Challenger load centers. It belongs to Challenger's APA-Series Type A family and carries a 10,000 AIC interrupt rating at 120 V, making it suitable for standard residential and light commercial protection where fault currents can be high. Built as a plug-in unit, it features a left-side hook (left clip) configuration for secure seating in compatible panels, and uses a thermal-magnetic trip mechanism to provide both long-time and instantaneous trip responses. The A120L is widely listed as a Challenger replacement option and is sold as a 1P, 20A, 120V unit, with left-clip/left-hook mounting. Typical applications include protecting branch circuits in commercial or industrial panels, feeders to lighting and receptacle circuits, and other 120 V circuits requiring overload protection. Replacement parts from Connecticut Electric and Bay Power confirm the model's ongoing availability as A120L, 1-pole, 20 A, 120 V.