The Siemens 3VA1110-3EF42-0AA0-ZD00 is a 4-pole IEC frame 160 circuit breaker from the 3VA1 line, rated 100A with a breaking capacity of 25kA at 415V (class N). Overload protection is adjustable from 70A to 100A via the TM240 thermal-magnetic trip unit, and short-circuit protection is set at 5 to 10 times In. The N conductor is unprotected, and the unit includes a nut keeper kit — this variant is configured for DC Power OEM in China.
What the ratings mean for your panel
The 25kA Icu at 415V puts this in breaking capacity class N — it's sized for standard industrial distribution where fault currents stay under that threshold. The 100A frame with adjustable Ir (70–100A) lets you dial in the exact load without swapping trip units. Ii at 5–10x In gives a magnetic trip window that handles motor inrush without nuisance tripping on a pump or compressor start. The 4-pole configuration with an unprotected neutral means this is for a 3-phase + N system where the neutral doesn't need its own overcurrent protection — common in IEC panel designs.
Panel integration notes
Mounts on standard DIN rail in a panel enclosure. The 4-pole width occupies four modular spaces — account for that in your fill factor and gland plate layout. The nut keeper kit is a small detail that saves time during panel assembly: it holds the busbar connection nuts in place so you don't need a second hand when torquing down.