The ABB THHQL22100 is part of the Q line series of circuit breakers, known for their compact design and reliable performance in residential and commercial settings. These breakers are just one inch wide per pole, making them a sleek choice when space is tight. The QL versions, like this one, are plug-in types that easily connect to load centers and lighting panels. Featuring Quick-make/Quick-break mechanisms, common trip bars, and clear trip indicators, they’re built to keep your system safe and running smoothly. Available in configurations ranging from one to three poles, you can also find options with auxiliary contacts and shunt trips, perfect for more specialized setups such as HID lighting. Distributed by BSP Automation, this model is a solid pick for those looking for dependable circuit protection that’s easy to install and maintain. In the industry, folks often refer to these as the “workhorse” breakers due to their versatility and ruggedness.