The Siemens 3VA1163-3EF32-0AA0-ZD00 is a 3-pole IEC frame 160 circuit breaker rated 63 A, with a breaking capacity class N of Icu=25 kA at 415 V. It uses a TM240 thermal-magnetic trip unit — the TM240 designation means the thermal element is sized for a 63 A continuous current, with overload protection adjustable from Ir=44 A to 63 A. Short-circuit magnetic pickup is fixed at Ii=5 to 10 times In, so the instantaneous trip point sits between 315 A and 630 A. This variant includes a nut keeper kit and is specified for DC Power OEM applications in China.
What the ratings mean for fit
The 25 kA Icu at 415 V tells you this breaker safely interrupts fault currents up to that level without welding contacts or rupturing the arc chamber — critical for panel coordination studies. The adjustable overload Ir=44…63 A lets you dial in the exact motor FLA or feeder load without swapping the trip unit. The Ii=5…10 x In magnetic range means nuisance tripping on moderate inrush (like a transformer or capacitor bank) is less likely than a fixed-high setting breaker.
Deployment context
Mounts on a DIN rail in a standard 3-pole width — fits a 160 A frame footprint, so panel fill factor and gland plate planning should account for the larger frame size versus a 63 A breaker in a 125 A frame. The nut keeper kit is for DC Power OEM builds where vibration or transport can loosen terminal connections.