What this MCCB is and where it fits
The Siemens 3VA1180-5ED36-0AA0 is a SENTRON molded case circuit breaker (MCCB) built for line protection — your main feeder or large branch in a distribution panel. 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. Three poles, no undervoltage release, no ground-fault monitoring: this is a straight-up thermal-magnetic breaker for standard AC distribution.
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. At 440 V it drops to 75.6 kA. At 500 V and 690 V it's 17 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
The 80 A rating holds from 40 °C all the way to 50 °C. 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. If your panel runs hot (say 60 °C inside), you still get 77 A continuous. The operating temperature range is -25 °C to 70 °C, so it's fine in unheated enclosures as long as you respect the derating curve.
Physical fit and panel integration
The breaker measures 70 mm deep, 76.2 mm wide, and 130 mm tall. That's a standard 3-pole MCCB footprint — it'll drop into a SENTRON panel or any DIN-rail-compatible enclosure with the right mounting base. Power loss is 19.2 W maximum, so plan your heat dissipation accordingly if you're stacking several in a sealed box.