It carries an 80 A rated current at 40 °C ambient and interrupts fault currents up to 75.6 kA at 415 V AC — the figure that governs selectivity in a 400 V industrial distribution board. Three poles, rated insulation voltage 800 V, and a breaking capacity that holds 121 kA at 240 V and 52.5 kA at 440 V.
Rated current holds at 80 A from 40 °C up to 50 °C, then derates to 78 A at 55 °C and 74 A at 70 °C. In a warm panel — say, 55 °C internal ambient — the breaker still carries 78 A continuous without nuisance tripping. Maximum power loss is 21.7 W, which feeds into the enclosure thermal budget.
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — a standard 3-pole MCCB footprint that fits most DIN-rail or screw-mounted panel layouts.