The Siemens 3VA2163-7MS36-0AB0 is a SENTRON molded case circuit breaker (MCCB) with a 63 A rated continuous current and a 3-pole frame. It's built around the ETU310M electronic trip unit, which gives you adjustable overload and short-circuit protection curves — not a fixed thermal-magnetic, so you can dial in coordination for motor or feeder circuits without swapping breakers.
Interrupting capacity and what it means on the line
This MCCB carries a 330 kA interrupting rating at 240 V AC and 242 kA at 415 V AC, which means it can safely clear a fault of that magnitude without blowing apart or welding contacts. On a 480 V panel feeding a motor control center, that kind of SCCR headroom lets you place it as the main feeder breaker without worrying about upstream fuse coordination — it stands alone on high-fault service entrances.
Current-carrying capacity across temperature
Rated at 63 A continuous from 40°C through 50°C ambient, the current capacity starts to derate above 55°C, dropping to 60.48 A at 55°C and 56.7 A at 70°C. If your panel sits in a hot machine room or next to a furnace, you need to factor that downrating into the load schedule — it won't hold full rating at the top of the operating range.