ABB XT4NU3250EFF000XXX Molded Case Circuit Breaker

ABB Tmax XT4NU3250EFF000XXX is a 250 A frame, three-pole molded-case circuit breaker (MCCB) in the XT4N family, engineered for low-voltage protection with an electronic LSI trip unit (EKI). Configured for up to 480 V AC service and designed to interrupt faults rapidly, it provides protection for feeders and motor circuits in industrial and large commercial power distribution systems. The model's short-circuit rating is 25 kA at 480 V, enabling reliable fault interruption while maintaining coordination with other protective devices in the distribution network. As part of ABB's Tmax XT line, this MCCB combines robust mechanical design with electronic protection to support coordination, testing, and compatibility with ABB accessories in panel boards and switchgear. The XT4NU3250EFF000XXX designation identifies a 3P XT4N configuration with an electronic trip unit, reflecting ABB's focus on modular, scalable protection solutions for demanding environments such as data centers, manufacturing facilities, and process plants. Typical installations include switchboards, distribution panels, and protection for feeders and motor circuits in warehouses, manufacturing floors, and data centers.