Its interrupting capacity at 240 V reaches 220 kA, at 415 V 154 kA, and at 440 V 121 kA — numbers that put it squarely in the high-fault-current range for a 3VA frame. The overcurrent release is fixed TM240, so the thermal pickup and magnetic trip are factory-set; there is no interchangeable trip unit. Deployment context: this MCCB lives in a panel — typically a main or feeder breaker in a distribution board, switchgear lineup, or industrial control cabinet.
At 55 °C the breaker carries 76.8 A, at 60 °C 75.2 A, at 65 °C 73.6 A, and at 70 °C 72 A. For a panel that runs hot (say 55 °C inside the enclosure), the usable current is 76.8 A, not the nameplate 80 A. That is the number to use in your load calculation.
Interrupting capacity — selectivity and SCCR headroom
At 415 V it drops to 154 kA, at 440 V to 121 kA, and at 690 V to 17 kA. For a 480 V / 277 V distribution system, the relevant figure is the 440 V rating (121 kA) — that is the SCCR the breaker contributes to the panel assembly.
The 76.2 mm width is a 3-pole frame — it occupies three 25.4 mm (1-inch) module positions on a DIN rail or panel-mount footprint. The depth of 70 mm is the body only; add clearance for the handle throw and cable bending radius behind the panel.