The Siemens 3VA1150-4EE32-0AA0-ZD00 is a 3-pole IEC frame 160 circuit breaker from the 3VA1 series, rated at 50 A with a breaking capacity class S — Icu of 36 kA at 415 V. That 36 kA interrupting rating at 415 V means it can safely clear a fault up to that level without upstream devices needing to coordinate, which simplifies panel design in industrial distribution boards where high fault currents are expected.
Overload and short-circuit protection settings
The TM220 thermal-magnetic trip unit gives adjustable overload protection (Ir) from 35 A to 50 A, and fixed short-circuit protection (Ii) at 10 x In — so 500 A magnetic pickup. That 10x multiplier is typical for motor branch circuits; it rides through inrush without nuisance tripping on a 50 A motor load.