The interrupting capacity is 76 kA at 240 V AC, 53 kA at 415 V AC, 32 kA at 440 V AC, and 12 kA at 500 V AC — so at 415 V it handles a 53 kA fault without upstream cascading, which is the number most panel builders check first for industrial distribution.
Thermal derating — what the current curve actually means
At 55 °C it derates to 39 A, at 65 °C to 38 A, and at 70 °C to 37 A. That's a 7.5 % reduction, enough to matter on a fully loaded circuit.
Front IP40 protection is standard for indoor panel mounting.