It is a standard panel-mount device for distribution and motor branch protection in industrial switchboards.
The 250 A frame and TMA trip unit (thermal-magnetic, adjustable) cover motor and feeder circuits where a fixed thermal curve won't do. The XT4H platform is common in ABB's low-voltage distribution — if you already have XT4 busbars or plug-in bases in the panel, this breaker drops in without adapter kits.