The Siemens 3VA1196-3EE32-0AA0-ZD00 is a 3VA1 IEC frame 160 molded case circuit breaker (MCCB) with a 3-pole configuration, rated at 16 A continuous current. Overload protection is handled by a TM220 thermal-magnetic trip unit with an adjustable Ir range of 11 A to 16 A, so you set the continuous current limit to match the load cable or equipment. Short-circuit protection is fixed at Ii = 20 x In (320 A magnetic pickup), which clears bolted faults fast but rides through motor inrush. The nut keeper kit in the description flags this as a variant built for a DC Power OEM in China — the hardware prevents loosening under vibration in that specific assembly.
The nut keeper kit is already fitted, so no additional lock-washer or thread-locker is needed on the load-side terminals — one less step for the panel builder. Keep the 25 kA SCCR in mind when sizing the upstream feeder breaker or fuse; coordination curves for the TM220 trip are in the Siemens selectivity manual.