The Siemens 3VA1196-6ED32-0AA0-ZD00 is a 3-pole IEC frame 160 molded case circuit breaker with a 70 kA breaking capacity at 415 V (class H). That Ii = 320 A instantaneous trip — means it clears hard faults fast, no intentional delay, which is what you want for feeder protection where selectivity with downstream breakers isn't the priority.
This breaker lands in a panel on the 3VA1 frame's DIN-rail adapter or screw-mount baseplate — standard Siemens 3VA mounting pattern, so retrofit into an existing 3VA lineup is a direct swap. The nut keeper kit (ZD00 suffix) is a DC Power OEM variant destined for China; that kit secures the line/load terminals for high-vibration environments like inverter cabinets or EV charging skids. If you're not building for that OEM spec, the standard 3VA1196 without the ZD00 suffix is the off-the-shelf alternative.