90 A thermal-magnetic trip on the XT1N frame
The ABB XT1NU3090AAA000XXX is a 3-pole molded case circuit breaker from the Tmax XT1N family, rated 90 A continuous at 600 VAC. The thermal-magnetic fixed trip protects against overload and short-circuit conditions without needing interchangeable trip units — set at the factory, no field adjustment. Frame size XT1N accepts up to 125 A maximum, so this 90 A unit leaves headroom for coordination studies if the load grows within the same frame.
Fixed front flat terminals — panel integration
Termination is fixed front flat terminals, which means the breaker arrives with its line and load connections integrated into the housing — no separate lug kit to order. This simplifies panel layout for the wireman: the breaker mounts directly onto the DIN rail or panel-mount adapter, and the flat terminal face accepts standard ring or fork terminals. The 3-pole fixed configuration keeps the phase sequence locked; no pole rearrangement possible in the field.