The Siemens 3VA1116-4GE42-0AA0-ZD00 is a 4-pole IEC molded case circuit breaker in the 3VA1 frame, sized for 160 A continuous current with a 36 kA interrupting capacity at 415 V (breaking capacity class S). The TM220 thermal-magnetic trip unit gives you adjustable overload protection from 112 A to 160 A and a fixed short-circuit pickup of 10 x In — meaning the magnetic trip fires at 1600 A. The 100% N-conductor protection means the neutral pole is fully rated, not derated, which matters for four-wire systems where the neutral carries phase imbalance or harmonics.
The 160 A frame and 160 A continuous rating mean the breaker is fully rated (no derating needed at 40 °C ambient, typical for a 3VA1). The TM220 trip curve is a standard thermal-magnetic characteristic; the adjustable Ir band (112–160 A) lets you fine-tune overload protection to the downstream cable or load without swapping the trip unit.