The Siemens SENTRON 3VA2163-6HL36-0AE0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current at 40 °C, with the ETU320 electronic trip unit handling overcurrent protection. That 63 A holds steady through 50 °C; above that it derates to 60.6 A at 55 °C and 53.6 A at 70 °C, so if the panel ambient runs hot, size the breaker for the actual temperature, not the nameplate. Interrupting capacity hits 242 kA at 240 V, 187 kA at 415 V and 440 V, and 121 kA at 500 V — numbers that put this in the high-fault-current class for industrial mains distribution.
Mounting and integration — what fits where
If you need remote trip or GF protection, you're looking at a different variant.