The ABB XT1HU3125ADD000XXX is a 3-pole molded case circuit breaker from the XT1H series, fitted with a TMF 125-1250 thermal-magnetic trip unit rated at 125 A. The description confirms UL and CSA certification, making it suitable for North American panel builds where a listed MCCB is required for branch circuit protection.
The TMF 125-1250 trip unit provides an adjustable thermal (overload) range from 125 A to 1250 A — the fixed rating at 125 A is the minimum setting. The magnetic (short-circuit) pickup follows the TMF curve, coordinated for motor-start inrush and feeder protection. The 3-pole, fixed-front (F F) configuration means the breaker ships with fixed terminals and no rotary handle, standard for panel-mount distribution.
Integration Context
Mounts in a standard ABB XT1H molded case switchboard or panelboard — the frame size accepts bus-bar plug-in or cable connection. UL/CSA listing covers the breaker as a stand-alone branch circuit protective device; no additional fusing required upstream within its interrupting rating.