What this 63 A MCCB carries in the panel
The Siemens 3VA2163-6HN32-0CC0 is a 3-pole SENTRON molded case circuit breaker rated for 63 A continuous current at 40 °C, with the ETU350 electronic trip unit handling the overcurrent protection curve. That 63 A holds flat through 50 °C — you don't lose headroom until 55 °C, where it derates to 60.6 A, then 58.3 A at 60 °C, 55.9 A at 65 °C, and 53.6 A at 70 °C. At 240 V it interrupts 242 kA — that's a very high figure, sized for large transformer secondaries or high-fault busways. For a 400 V distribution board, that 187 kA gives you plenty of SCCR headroom for most industrial service entrances.
The 3VA2163-6HN32-0CC0 measures 105 mm wide, 181 mm high, and 86 mm deep — a standard 3-pole MCCB footprint for Siemens SENTRON panels.