This Siemens 3VA1163-3ED32-0AA0-ZD00 is a 3-pole molded case circuit breaker from the 3VA1 series, built on an IEC frame 160. It's rated at 63 A continuous current with a breaking capacity of 25 kA at 415 V (class N), so it handles fault currents up to that level without blowing apart — that's the number that decides if it clears a short in your panel or cooks the bus. The thermal-magnetic trip unit is fixed: Ir = 63 A overload protection, and short-circuit pickup Ii is set at 10 x In (630 A). That means it's a line-protection breaker — not adjustable, not for motor-starting duty where you need a higher magnetic pickup to avoid nuisance trips on inrush. It's sized for a feeder or a large branch circuit where the load is predictable.
The description also notes a nut keeper kit for DC Power OEM in China — a mounting accessory for DC-side applications.