The Siemens SENTRON 3VA1163-3EF36-0JC0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current at 40 °C, with a TM240 thermal-magnetic release that provides overload and short-circuit protection for line distribution. The 63 A rating holds flat from 40 °C through 50 °C, then derates gradually to 56.7 A at 70 °C — so in a warm enclosure you lose about 10 % of capacity, not the full thermal drop some frames show. Breaking capacity is 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V — the 415 V figure is the one that matters for most European 400 V distribution panels; it clears a 52.5 kA fault without cascading upstream.
The 3VA1163-3EF36-0JC0 measures 130 mm high, 76.2 mm wide, and 70 mm deep — a compact footprint for a 63 A frame. The front face is IP40 rated, so it's fine in a typical enclosed panel; no washdown rating, so keep it out of wet areas. The 2 auxiliary switches (HQ type) are wired via the integrated terminals; the shunt trip coil is factory-fitted and wired to the designated terminals. No trip indicator on the front — you'll rely on the aux contacts or a separate indicator for status.