The Siemens 3VA2163-5KP32-0KH0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current across the full ambient temperature range from 40 °C to 70 °C — no derating needed up to that ceiling. Its 187 kA interrupting capacity at 240 V gives you serious fault-current headroom for line-side protection in a distribution panel or motor control center. The 86 mm depth and 105 mm width fit standard MCCB mounting footprints, so it drops into existing SENTRON or third-party panel layouts without re-drilling the backplate.
Breaking capacity and selectivity
This breaker delivers 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. That 121 kA at 415 V is well above typical utility fault levels in most industrial installations, so you can coordinate downstream breakers without worrying about the main tripping first on a high-impedance fault. The 3-pole line-protection design means it's set up for feeder or main breaker duty, not motor protection — pair it with a separate overload relay if you're feeding a motor starter.
Auxiliary and communication features
Factory-fitted with 2 auxiliary switches plus a trip alarm switch (HQ), and a shunt trip (STL) for remote or emergency-off tripping. The communication function lets this breaker talk to a higher-level control system — useful for energy monitoring or remote reset in a conveyor line where you want to know which zone tripped without walking the panel. No undervoltage release or ground-fault monitoring on this variant, so if you need those, look at the 3VA2 options with the UVR or GFM suffix.