The Siemens 3VA1196-4GD42-0AA0-ZD00 is a 4-pole IEC frame 160 circuit breaker with a 16 A thermal-magnetic trip unit (TM210). The fixed Ir=16 A overload and Ii=20 x In short-circuit setting (320 A magnetic pickup) are set at the factory, so there's no field-adjustment dial; you order the exact rating your BOM calls for.
The nut keeper kit and DC Power OEM designation in the description indicate this variant was built for a specific OEM build; verify the accessory kit matches your panel hardware before committing the order.
For selectivity studies, pair it with upstream breakers rated at least one class higher (e.g., class L or H) so the downstream device clears first. The 100% N conductor protection means the neutral pole is rated for full phase current, not a reduced cross-section — important on 4-wire systems with harmonic loads. Mounts in a standard Siemens 3VA1 panelboard or individual enclosure. The nut keeper kit is a captive-hardware detail that saves time on the gland plate — no loose washers to drop inside the panel. The DC Power OEM suffix suggests this unit was originally kitted for a DC-side application in China; confirm the DC voltage rating if reusing outside that scope.