The Siemens 3VA1112-5EE32-0AA0-ZD00 is a 3-pole IEC frame 160 circuit breaker rated 125 A continuous, with a breaking capacity of 55 kA at 415 V (class M). That Icu means it can safely interrupt a fault current up to 55 kA without welding its contacts or cascading damage upstream — sized for high-fault industrial distribution panels where the available short-circuit current is substantial.
Overload and short-circuit settings
The TM220 thermal-magnetic trip unit gives an overload protection range (Ir) adjustable from 88 A to 125 A, and a fixed short-circuit pickup (Ii) at 10 x In — 1250 A. That 10x multiplier is typical for line protection of cables and busbars, not motor starting; if you need a lower magnetic pickup for motor loads, this isn't the trip curve you want.