The Siemens 3VA1120-4EE42-0AA0-ZD00 is a 4-pole IEC frame 160 circuit breaker from the 3VA1 series, rated In=20A with a TM220 thermal-magnetic trip unit.
The overload protection Ir is adjustable from 14 A to 20 A, and the short-circuit protection Ii is fixed at 16 x In (320 A).
This variant is designated for DC Power OEM in China, meaning the packaging and any accompanying documentation are tailored for that market. The breaker itself is a standard 3VA1 IEC device, so its electrical ratings and footprint are identical to the global version.