The interrupting rating drops to 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V, so verify your system voltage against the curve before specifying. This MCCB includes a communication function for remote monitoring and trip-event logging. The auxiliary switch design is listed as 2 auxiliary switches HQ.
The 400 A rating holds up to 50 °C ambient; above that, derate linearly to 375 A at 55 °C, 350 A at 60 °C, 325 A at 65 °C, and 300 A at 70 °C. Max power loss is 96 W at full load, which adds to the enclosure's thermal budget.