ABB XT4HU3040GFF000XXX Molded Case Circuit Breaker

ABB Tmax XT4HU3040GFF000XXX is a 3-pole molded-case circuit breaker rated for 40 A, designed for reliable overcurrent protection in low-voltage distribution systems. As part of ABB’s Tmax XT4 family, it protects three-phase feeders, panelboards, and downstream equipment from overloads and short circuits in commercial and light industrial installations. The device uses a thermal-magnetic trip mechanism to sense both long-duration overloads and sharp fault currents, providing automatic interruption to safeguard conductors and motors, with fast response to short circuits. The XT4 platform is known for robust enclosure construction and compatibility with standard low-voltage panels and switchgear, enabling straightforward integration into existing protection schemes with other Tmax XT components. The exact part number XT4HU3040GFF000XXX identifies a 40 A, 3-pole unit within ABB’s XT4 line, suitable for protecting distribution circuits where reliable, coordinated protection is required in demanding environments such as manufacturing floors, warehouses, or data center auxiliary systems.