What this MCCB carries and where it fits
The Siemens SENTRON 3VA1063-3ED42-0JC0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection in distribution panels. It carries a continuous current of 63 A at 40 °C, derating to 58 A at 70 °C — the full thermal curve is on the nameplate, so you can size it for a warm enclosure without guessing. The 75.6 kA breaking capacity at 240 V (52.5 kA at 415 V, 32 kA at 440 V, 7.5 kA at 500/690 V) means it can interrupt high fault currents upstream of a branch panel, keeping selectivity with downstream breakers. The 800 V rated insulation voltage covers most industrial supply voltages with margin. It ships with a shunt trip release (STL) and two auxiliary switches HQ — no undervoltage release, no ground-fault monitoring, no communication module. That keeps it a clean line-protection device: trip it remotely via the shunt coil, but don't expect Modbus or a trip-indicator flag.
Panel fit and mounting note
The breaker measures 70 mm deep, 101.6 mm wide, 130 mm high — a standard SENTRON 3VA frame footprint. It mounts on a DIN rail or directly to a backplate via the screw terminals. The 4-pole body takes up roughly 4 inches of rail width; plan your enclosure fill factor accordingly. The shunt trip and auxiliary switches are factory-installed, so no field assembly of the release mechanism — just wire the coil and the aux contacts per the wiring diagram on the side label.