The GE THQL1120AF2 Combination Circuit Breaker is a plug-in, 1-pole, 20 A arc fault circuit breaker with a maximum amperage of 20 A. It operates on a combination method and is designed for single-phase current type AC at 120V. This black-colored main breaker from GE is ideal for electrical protection in industrial and commercial settings, with a total of 11-20 circuits. The model THQL1120AF2 offers reliable and efficient circuit breakage functionality without the need for a box.