The Siemens 3VM1163-5EE32-0AA0 is a 3-pole SENTRON molded case circuit breaker (MCCB) rated 63 A continuous at 40 °C, with a TM220 thermal-magnetic trip unit.
Thermal derating — what the 63 A nameplate actually means
The 63 A rating holds flat from 40 °C to 50 °C, then drops to 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C. That's a 5 A loss over a 30 °C rise — typical for a TM220 release. If your enclosure runs hot (say 55 °C internal ambient), you're still good for 62 A continuous.
IP40 on the front face means it's splash-protected from the front but not sealed for washdown; keep it inside the enclosure. The TM220 release is fixed (no interchangeable trip unit), so verify the 63 A continuous rating against your load before committing.