What this 3VA1 breaker carries
The Siemens 3VA1163-6EE32-0AA0-ZD00 is a 3-pole IEC frame 160 circuit breaker in breaking capacity class H, rated to interrupt 70 kA at 415 V. That 70 kA SCCR means it can clear a fault up to that level without upstream devices needing to coordinate — a real advantage when you're retrofitting into an existing panel where the available fault current is high and you don't want to swap the main breaker. Overload protection uses a TM220 thermal-magnetic trip unit, adjustable from 44 A to 63 A via the Ir dial. Short-circuit pickup is fixed at 10 x In (630 A magnetic). For a 63 A feeder feeding a motor control center or a distribution sub-panel, that's a standard coordination curve — the magnetic floor keeps nuisance trips off during inrush while still clearing a bolted fault fast. The suffix ZD00 indicates this variant includes a nut keeper kit and is configured for a DC Power OEM in China. That's a factory-customized order code — the base electrical ratings (frame, poles, breaking capacity, trip) are standard 3VA1, but the accessory kit and OEM designation mean you're buying the exact BOM-listed variant, not a parametric substitute.
What the ratings mean for panel fit
The 3VA1 frame mounts on a DIN rail or can be screw-fixed to a backplate. At 3-pole with a 63 A TM220 trip, it occupies the same panel footprint as any 3VA1 frame breaker — so if you're replacing a failed unit or adding a feeder, the busbar and lug kit spacing is standard for the series. The 70 kA breaking capacity at 415 V is class H — the highest standard interrupting rating in the 3VA1 frame. That gives you headroom for high-fault installations (close to a transformer secondary or a large generator bus) without needing a current-limiting upstream breaker. For a 63 A feeder, that's overkill in most distribution panels, but it's the right call when the available fault current at the panel is unknown or variable.