The ABB XT4NU3150FFJ000XXX is a 3-pole molded case circuit breaker from the XT4N 250 series, fitted with an EKIP LSI electronic trip unit and rated at 150 A. The 'F F' designation indicates fixed thermal and fixed magnetic settings, and the unit carries UL/CSA approvals for North American panel installations.
The 150 A continuous rating sets the maximum uninterrupted load this breaker can carry without tripping. The EKIP LSI trip unit provides adjustable protection curves.
Panel Integration & Compliance
The 3-pole form factor fits a 72 mm wide cutout (three module spaces). UL/CSA listing means it passes North American panel inspections without additional agency paperwork — nameplate matches the PO for traceability.