It's rated 80 A continuous current and carries a TM210 thermal-magnetic release, so it handles both overload and short-circuit protection in one device.
Breaking capacity — the real story
This breaker's interrupting rating changes with system voltage, and that's the number that decides whether it holds or explodes on a fault. At 240 V it's rated 187 kA — plenty for most industrial service entrances. At 415 V it's 121 kA. The takeaway: for a 480 V or 400 V distribution board, you've got 75.6 kA or 121 kA of SCCR headroom respectively. That's enough for high-fault panels without cascading upstream breakers.
Temperature derating — don't ignore it
At 55 °C it's 78 A, at 60 °C it's 77 A, at 65 °C it's 75 A, and at 70 °C it's 74 A. That's a gentle slope — about 1 A per 5 °C above 50 °C.
Power loss is 19.2 W maximum, so plan your heat dissipation accordingly if you're stacking several in a sealed box.