The ABB catalog number THHQB22040 refers to a compact, bolt-on circuit breaker from the Q line series, designed to fit snugly within bus connections of load centers and lighting panels. Known for their reliable thermal-magnetic protection, these breakers are just about an inch wide per pole, making them space-savvy for both residential and commercial setups. What makes these circuit breakers stand out is their Quick-make/Quick-break mechanism and common trip bars, which help provide clear trip indication for enhanced safety and ease of maintenance. Available in single, double, or triple pole versions, they can also be equipped with auxiliary contacts or shunt trip accessories, and are suitable for HID applications too. If you’re on the lookout for quality breakers that get the job done without fuss, ABB’s Q line, as distributed by BSP Automation, is definitely the way to go.