Above that, the thermal curve steps down: 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, 223 A at 70 °C. At higher voltages the capacity drops: 121 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, 17 kA at 690 V. Power loss at rated load is 59.5 W — account for that heat in the enclosure thermal calculation, especially in a multi-breaker lineup.
Footprint is 140 mm wide, 158 mm high, 70 mm deep — a standard SENTRON 3VA frame size for 250 A. The 4-pole configuration (three phases plus neutral) is typical for a 3-phase + N distribution board.