What this MCCB carries and where it fits
The Siemens 3VA2163-5MN32-0DL0 is a SENTRON 3-pole molded case circuit breaker (MCCB) designed specifically for motor protection. It holds its full 63 A rating from 40 °C all the way up to 70 °C ambient — no derating headache in a warm panel enclosure. The interrupting capacity hits 187 kA at 240 V, 121 kA at 415 V and 440 V, and still clears 75.6 kA at 500 V, so it handles high-fault industrial feeds without cascading upstream. This MCCB includes undervoltage release and a full auxiliary switch complement: two auxiliary switches plus one trip alarm switch and one electrical alarm switch. Phase failure detection is built in, and the trip indicator gives a clear visual on the front. It's a motor protection design, not a plain distribution breaker — the trip curve and accessories are matched to motor starting profiles.
Panel fit and environment
The 3VA2163-5MN32-0DL0 measures 105 mm wide, 181 mm tall, and 86 mm deep — standard MCCB footprint for a 3-pole 63 A frame. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C. Maximum power loss is 6.5 W, which is modest for this rating; no forced cooling needed in a typical IP54 enclosure.