Above that temperature, it derates: still 125 A at 50 °C, then 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, and 114 A at 70 °C. If your panel runs hot, the actual ampacity is lower than the nameplate; plan the load accordingly. At 240 V it handles 76 kA; at 415 V, 53 kA; at 440 V, 32 kA; at 500 V, 12 kA. The 415 V figure (53 kA) is the one most relevant for 400 V industrial distribution in Europe and Asia. The overcurrent release is a TM220 thermal-magnetic type, so it provides both thermal (overload) and magnetic (short-circuit) protection in one unit.
Maximum power loss is 23 W, so plan for that heat dissipation inside the enclosure; if you pack multiple breakers side by side, the internal temperature rise may push you into the derated current column above 55 °C. If you need remote tripping or ground-fault sensing, you'd step up to a 3VA-series or add external accessories. The trip indicator is not present, so visual trip status is read from the handle position only.