The Siemens 3VA1463-4EE42-0AA0-ZD00 is a 4-pole IEC frame 630 circuit breaker from the 3VA1 series, rated for line protection with a TM220 thermal-magnetic trip unit. The overload protection is adjustable Ir=440A...630A, and short-circuit protection is fixed at Ii=8 x In, so for a 630A rating the magnetic pickup is at 5040A.
The nut keeper kit included with this variant is specific to DC Power OEM builds in China — a detail that matters if you're sourcing for a standard panel build versus a captive OEM line. Mounts in a standard Siemens 3VA1 drawout cradle or fixed-mounted base; panel integration follows the usual 3VA1 cutout and busbar pattern.