Interrupting capacity runs from 187 kA at 240 V down to 5.1 kA at 690 V, so it handles high-fault service-entrance or distribution panels where the available fault current is substantial.
Thermal derating and panel space
At 40 °C the breaker holds the full 250 A; at 70 °C it derates to 213 A. That matters if you're packing this into a warm enclosure or next to other high-current devices. The 140 mm width, 181 mm height, and 86 mm depth mean it fits standard MCCB mounting footprints — check your backpanel layout against those numbers before you drill.