The ABB XT1SQ3100AFF000XXX is a robust and reliable circuit breaker designed for optimal performance in electrical systems. This model, part of the XT1S series, features a 125 amp frame with a thermal magnetic fixed (TMF) trip unit, adjustable from 100 to 1000 amps, providing precise protection for your electrical circuits. The 3-pole configuration ensures comprehensive coverage, while the UL/CSA certification guarantees compliance with industry standards for safety and quality. Additionally, the XT1 UL 3-pole laser-etched label indicates a 100% Iu rated capacity, ensuring maximum efficiency and reliability in demanding environments. Ideal for both commercial and industrial applications, this circuit breaker is engineered to deliver superior performance and peace of mind.