The Siemens 3VA1216-4EF32-0AA0-ZD00 is a 3-pole IEC frame 250 circuit breaker in the 3VA1 series, rated for line protection with a TM240 thermal-magnetic trip unit.
The overload protection is adjustable via the ATAM module from Ir=112 A up to 160 A, letting you fine-tune the trip point to match the actual load current rather than swapping breakers. Short-circuit protection is fixed at Ii=5 to 10 times In, so the magnetic trip fires between 800 A and 1600 A — fast enough to clear a bolted fault before the let-through energy damages the bus bars. This breaker is built on the 3VA1 IEC frame 250 platform, which shares the same mounting footprint and accessory ecosystem as the rest of the 3VA family. That means the rotary handle, shunt trip, auxiliary contacts, and busbar connectors from the standard 3VA line fit here — no custom adapters needed for the panel integration.
The nut keeper kit (the ZD00 suffix) is a factory-fit option for the DC Power OEM variant; if your application does not need that hardware, the base order code without ZD00 may be a simpler alternative.