The Siemens SENTRON 3VA2163-5KP32-0AD0 is a 3-pole molded case circuit breaker rated for 63 A continuous current, built around the ETU850 electronic trip unit. That trip unit gives you adjustable overload and short-circuit protection curves, plus a communication function for remote monitoring or integration into a higher-level control system — useful when you need to track breaker status without a panel walk.
Breaking capacity and derating
Breaking capacity hits 187 kA at 240 V, drops to 121 kA at 415 V and 440 V, then 79 kA at 500 V, and 4.25 kA at 690 V. That 187 kA figure at 240 V tells you this breaker handles high-fault utility feeds or transformer secondaries without cascading upstream — it's a line-side main, not a downstream feeder. The 4.25 kA at 690 V still covers most motor branch circuits at that voltage.
Thermal derating and panel fit
Rated 63 A from 40 °C through 50 °C ambient; above that it derates linearly to 53.55 A at 70 °C. If your panel runs hot — say 55 °C inside the enclosure — you're looking at 60.6 A continuous, so size your load accordingly. The 86 mm depth and 105 mm width fit a standard SENTRON 3VA mounting footprint; the 181 mm height clears most distribution panelboards. IP40 on the front means it's protected against solid objects over 1 mm, but not against water ingress — keep it inside a dry enclosure.