The Siemens 3VM1180-3EE36-0AA2 is a 3-pole IEC molded case circuit breaker from the 3VM1 series, built on a 160 A frame. It's rated for a breaking capacity of 25 kA at 415 V (class N), which means it can safely interrupt a fault current up to that level without welding its contacts or letting an arc flash through the enclosure — a key spec for coordinating downstream protection in a distribution panel.
Protection settings and what they mean on the line
This breaker ships with a TM220 thermal-magnetic trip unit. The continuous current rating (In) is 80 A, with an adjustable overload protection band (Ir) from 56 A to 80 A — so you dial it in for the actual load, not just the frame size. The magnetic short-circuit pickup (Ii) is fixed at 10 times In, or 800 A. That's a standard motor-starting curve: it'll hold through an inrush without nuisance tripping, but clears fast on a bolted fault.