The Siemens 3VA1116-5EE42-0AA0-ZD00 is a 4-pole IEC frame 160 circuit breaker rated for line protection, carrying a 160 A continuous current rating (In) and a 55 kA ultimate breaking capacity (Icu) at 415 V AC — class M breaking capacity. The TM220 thermal-magnetic trip unit gives adjustable overload protection (Ir) from 112 A to 160 A, matching the conductor or load ampacity, and a fixed short-circuit pickup (Ii) at 10× In, so it clears bolted faults fast while riding through motor inrush.
The 4-pole footprint occupies four module widths on the rail; the nut keeper kit (included per the order-code suffix) is a detail for the DC Power OEM variant destined for China — it holds the terminal nuts captive during assembly, saving a hand on the line.