Breaking capacity runs from 440 kA at 240 V down to 52.5 kA at 690 V (–), which covers most industrial service-entrance and sub-distribution applications; the 330 kA at 415 V is the figure most panel builders will reference for European 400 V networks. Insulation voltage rated at 800 V gives headroom for 690 V systems without derating the dielectric. Power loss is a low 0.5 W, negligible in a dense panel. Operating temperature spans -25 °C to 70 °C, with storage from -40 °C to 80 °C; the 70 °C operating ceiling matches the derating curve for the 25 A rating held flat across the full ambient range (–).
For a panel OEM wireman: the 25 A rating at 40 °C means no derating in a 40 °C ambient; if your enclosure internal temp hits 70 °C, the same 25 A holds — the breaker is thermally stable across the full range.