The Siemens 3VA1116-3GD42-0AA0-ZD00 is a 4-pole IEC frame 160 circuit breaker built for line protection in industrial panels. It's rated for a breaking capacity of 25 kA at 415 V (class N), with a fixed 160 A thermal-magnetic overload (TM210) and fixed short-circuit pickup at 10 x In. The neutral conductor is fully protected at 100% of phase rating, and it ships with a nut keeper kit — a detail that saves time on the gland plate when you're wiring up a DC Power OEM cabinet in China.
What the ratings mean for fit
The 25 kA Icu at 415 V tells you this breaker can safely interrupt a fault up to that level without welding its contacts or blowing apart — critical for SCCR compliance on the line side of a drive or distribution panel. The fixed Ir=160 A means no adjustment dial; you size the breaker to the load, not the other way around. Fixed Ii=10 x In (1600 A magnetic trip) suits motor or transformer inrush without nuisance tripping, but won't coordinate with a feeder breaker that has a lower instantaneous threshold — check your selectivity study.