Siemens 3VA1063-4ED32-0AA0 — SENTRON MCCB for Line Protection
It carries a continuous current rating of 63 A at 40 °C, derating to 58 A at 70 °C, so the thermal curve matters if your panel ambient runs hot — the 63 A figure holds up to 50 °C, then drops 1 A per 5 °C step.
Rated short-circuit breaking capacity reaches 121 kA at 240 V AC, dropping to 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. For a 415 V distribution board, that 75.6 kA figure gives substantial fault-current headroom for most industrial service entrances — you can coordinate downstream MCBs without worrying about the upstream breaker's through-fault limit.
Dimensions are 130 mm height, 76.2 mm width, and 70 mm depth — a 3-pole MCCB footprint that fits standard Siemens SENTRON distribution boards and most DIN-rail-mount enclosures with the appropriate adapter. The IP40 front protection means the breaker face is sealed against solid objects over 1 mm, but the enclosure itself must provide the overall panel IP rating.