The Siemens SENTRON 3VA1163-5ED36-0AA0 is a 3-pole molded case circuit breaker rated for 63 A continuous current at 40 °C, with a TM210 thermal-magnetic overcurrent release.
This MCCB delivers 187 kA interrupting capacity at 240 V AC, 121 kA at 415 V, 75.6 kA at 440 V, and holds at 17 kA all the way up to 690 V. That's a flat 17 kA from 500 V to 690 V — the spectrum doesn't lie: the arc extinction chamber is tuned for low-voltage high-fault conditions, and the curve tells you this breaker can sit upstream of a 2 MVA transformer without coordination headaches.
At 55 °C it's 62 A, at 60 °C it's 61 A, at 65 °C it's 60 A, and at 70 °C it's 58 A. That's a derating curve of about 1 A per 5 °C above 50 °C — predictable, linear, and easy to factor into a panel thermal study. If your enclosure hits 70 °C internally, you lose 5 A off the nameplate; plan the load accordingly.
The 3-pole footprint matches standard SENTRON 3VA mounting patterns — it bolts into the same busbar and backplate hole pattern as other 3VA1 frame breakers.