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. For a panel builder, that means this breaker can sit in a warm enclosure without forced cooling and still carry a full 63 A load up to 50 °C ambient. Breaking capacity is the headline number that decides whether this breaker clears a fault without upstream damage. At 240 V it interrupts 242 kA — that's a very high figure, sized for large transformer secondaries or high-fault busways. At 415 V it still holds 187 kA, and at 690 V it drops to 5 kA. For a 400 V distribution board, that 187 kA gives you plenty of SCCR headroom for most industrial service entrances. The integrated undervoltage release (UVR) trips the breaker when control voltage drops below a threshold — standard on this variant, part of the auxiliary release design. It also carries two HQ auxiliary switches for status feedback to a PLC or annunciator panel. No communication module, no ground-fault monitoring on this build; it's a straight line-protection breaker with UVR and aux contacts.
Panel fit and mounting
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. It mounts on a DIN rail or directly to a backplate via the breaker's integrated fixing points. The 86 mm depth means it clears most 200 mm deep enclosures with room for wiring gutters.