The Siemens 3VA1120-5EF42-0AA0-ZD00 is a 4-pole circuit breaker from the 3VA1 IEC frame 160 series, rated for line protection with a TM240 thermal-magnetic trip unit.
Short-circuit protection is set at Ii=8 to 16 x In, so the magnetic trip responds between 160 A and 320 A depending on the dial setting.
Deployment context
The nut keeper kit included in the suffix (ZD00) is a DC Power OEM variant, so this breaker ships with hardware for DC-side mounting in OEM equipment built in China. That's a detail to note if you're replacing a standard 3VA1: the ZD00 suffix changes the accessory kit, not the electrical ratings.