Its breaking capacity is 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 4.5 kA at 690 V — per the datasheet, these are the maximum fault currents the breaker can safely interrupt at each voltage level, which is the figure that governs whether it coordinates with downstream devices in a selective scheme.
The continuous current rating holds at 250 A from 40 °C up to 50 °C ambient, then derates linearly to 213 A at 70 °C — within tolerance for most enclosed switchboards, but worth checking against the actual ambient inside the enclosure if it runs near the upper end of the range. Physical dimensions are 86 mm depth, 140 mm width, and 181 mm height, which matches the standard SENTRON 3VA2 frame footprint for 250 A class breakers.