What it is and what it does
The Siemens 3VA1116-5GF42-0AA0-ZD00 is a 4-pole IEC frame 160 molded-case circuit breaker with breaking capacity class M — rated Icu=55kA at 415V. It carries a TM240 thermal-magnetic trip unit, fixed at In=160A, with overload protection adjustable from 112A to 160A and short-circuit pickup Ii=5...10 x In. The N conductor is protected at 100%, and the unit includes a nut keeper kit; it is configured as a DC Power OEM variant for integration into equipment built in China.
What the ratings mean for fit
The 55kA Icu at 415V means the breaker can safely interrupt fault currents up to that level without upstream cascading — critical for high-fault-capacity industrial panels. The adjustable Ir (112-160A) lets you dial in the exact motor or feeder load, and the 5-10x In short-circuit pickup range covers typical motor inrush without nuisance tripping. The 4-pole construction and 100% N protection suit it for 3-phase + neutral systems where the neutral must be switched and protected equally.