What this MCCB does on the line
It carries a TM240 thermal-magnetic trip unit — fixed thermal, magnetic adjustable — sized for feeder or large motor branch protection where you need the interrupting capacity to handle a stiff source. That kind of SCCR headroom means it can sit right behind a transformer or on a high-fault bus without cascading upstream. The interrupting curve drops predictably as voltage climbs: 36 kA at 440 V, 17 kA at 690 V. If you're on a 480 V system (common in North American industrial) the 440 V figure is the closest published — 36 kA is still a serious number for a 250 A frame. The insulation rating is 800 V Ui, so it's comfortable on 600 V class gear.
Thermal derating — the real-world current
Above that it derates: 243.3 A at 55 °C, 236.5 A at 60 °C, 229 A at 65 °C, and 223 A at 70 °C. That's a design margin to watch when sizing the feeder.
The can measures 105 mm wide, 158 mm tall, 70 mm deep.