What the ratings mean for your BOM
The 3VA1463-5EE32-0AA0-ZD00 is a Siemens 3VA1 IEC frame 630 molded-case circuit breaker, 3-pole, rated Icu=55kA at 415 VAC — that's the maximum short-circuit current it can safely interrupt under fault conditions, giving you selectivity headroom for a main or feeder breaker in a 400 V distribution panel. The TM220 thermal-magnetic trip unit gives adjustable overload protection from Ir=440 A to 630 A, and a fixed short-circuit pickup Ii=8 x In (5040 A at the 630 A tap). That 8x multiplier is typical for motor-circuit coordination; it rides through starting inrush without nuisance tripping. Built for a Chinese OEM DC-power application; the keeper prevents hardware loosening under vibration.
Where it fits in the panel
The 3VA1 frame mounts on a DIN rail or can be screw-fixed to a backplate. At 630 A, plan for cable or busbar entry sized to the lug range — the frame accepts conductors up to 300 MCM / 150 mm² typically. The nut keeper kit adds a retention plate under the terminal screws, so factor that into the torque sequence.