What this 80 A MCCB does on the line
The Siemens SENTRON 3VA1180-3ED12-0AA0 is a 1-pole molded case circuit breaker rated for 80 A continuous current at 40 °C, with a TM210 thermal-magnetic overcurrent release tuned for line protection — meaning it handles feeder and distribution duty, not motor-starting profiles. Its interrupting capacity hits 52.5 kA at 240 V AC and 7.5 kA at 415 V AC, so it can clear high-fault scenarios on the secondary side of a distribution transformer or in a panel fed by a stiff utility service. The 25.4 mm width per pole keeps the panel footprint tight; at 70 mm deep it fits standard distribution board gutters without crowding the wiring trough.
At 55 °C it steps down to 78 A, then 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C. The maximum power loss is 6.4 W, which keeps self-heating low enough that adjacent devices aren't cooked.