ABB XT1NU3050AFF000XXX Industrial Low Voltage Circuit Breaker

ABB XT1NU3050AFF000XXX is a 50 A, three-pole molded case circuit breaker from the Tmax XT family, designed for low-voltage protection in industrial and commercial power systems. This XT1N frame device (125 A class) uses a thermal-magnetic trip unit with selectable curves (N, S, or H) for short-circuit protection, corresponding to 18 kA, 22 kA, or 25 kA interrupting capacities at 600Y/347V. Rated for 50/60 Hz operation, it is intended for distribution panels and motor feeders in 600 V class installations. The part number XT1NU3050AFF000XXX identifies the 50 A, 3-pole option within the XT1N frame, and ABB’s product selector lists the N/S/H variants and their interrupting ratings. The breaker features front line/load side connection and double insulation, and occupies a compact footprint of about 5.12 in high, 3 in wide, and 2.75 in deep. It operates in ambient temperatures from -13 to 158 °F (-25 to 70 °C) and is UL/CSA listed for use in appropriate electrical assemblies. This model is part of ABB’s Tmax XT line, commonly used in low-voltage distribution, motor control, and feeder protection in industrial and commercial installations.