The ABB XT4NU3200AFJ000XXX is a molded case circuit breaker from the XT4N series, carrying a 250 A frame with a TMF 200-2000 A thermal-magnetic fixed trip unit. It's a 3-pole, fixed-front, fixed-connection configuration, UL/CSA listed — meaning it's built for North American panel builds where UL 489 compliance is the baseline.
What the Ratings Mean
The 250 A frame and TMF 200-2000 A trip unit cover a wide adjustable range — the TMF (thermal-magnetic fixed) trip provides inverse-time overload protection plus instantaneous magnetic short-circuit protection. The 3-pole configuration handles three-phase loads up to 480Y/277 V or 600 V delta, typical for feeder circuits in industrial switchboards or motor control centers. UL/CSA listing means it's accepted for service entrance equipment in North American installations.