Siemens 3VM1 IEC frame 160 circuit breaker, 3-pole, breaking capacity class N, Icu=25kA @ 415V, line protection TM220, ATFM, In=80A, overload protection Ir=56A...80A, short-circuit protection Ii=10 x In, terminal connection.
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.
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The Icu (ultimate breaking capacity) is 25 kA at 415 V, class N. That's the maximum fault current it can safely interrupt at that voltage level.
Overload protection (Ir) is adjustable from 56 A to 80 A. Short-circuit protection (Ii) is fixed at 10 times In, or 800 A for the 80 A rating.
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