It carries a maximum interrupting capacity of 330 kA at 240 V, dropping to 242 kA at 415 V and 440 V, 187 kA at 500 V, and 7.5 kA at 690 V — so at typical 400 V-class industrial feeds it handles fault currents up to 242 kA without upstream coordination issues.
The 400 A rating holds flat from 40 °C through 50 °C, then derates to 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C. In a sealed enclosure or high-ambient machine cabinet, that means you lose 60 A by the time the internal air hits 70 °C — plan the load accordingly or add ventilation. Dimensions are 248 mm high × 138 mm wide × 110 mm deep, which fits the standard SENTRON 3VA mounting footprint; the panel cutout and bus-bar spacing match the existing 3VA line.