Its interrupting capacity hits 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 690 V — the 415 V figure is the one that typically governs for European 400 VAC distribution, giving solid headroom for high-fault panels without cascading upstream breakers.
The breaker holds its full 80 A from 40 °C up to 50 °C, then begins a gentle derating curve: 76.8 A at 55 °C, 75.2 A at 60 °C, 73.6 A at 65 °C, and 72 A at 70 °C. In a sealed panel with poor airflow, that 70 °C ambient limit means you lose 10 % of the nominal capacity — plan your thermal budget if the breaker sits near transformers or drives.
Physical dimensions and panel fit
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or mounting-plate layouts without surprises.