Integrator note — 3VA1063-3ED42-0CC0
The Siemens SENTRON 3VA1063-3ED42-0CC0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection. It carries 63 A continuously at 40 °C, derating to 58 A at 70 °C — the thermal curve matters if your panel ambient runs hot. The interrupting rating hits 75.6 kA at 240 V, 52.5 kA at 415 V, and 32 kA at 440 V; that's SCCR headroom for most distribution panels downstream of a transformer. The built-in undervoltage release (UVR) drops the breaker on loss of control voltage — common for emergency-stop chains or mains undervoltage protection. No communication module, no ground-fault monitoring; this is a straight line-protection device with auxiliary switches (2 HQ) for status feedback.
Panel fit & mounting
Dimensions: 130 mm high, 101.6 mm wide, 70 mm deep. The 4-pole width (101.6 mm) is standard for a 4-pole MCCB in this class — verify DIN-rail or screw-mount clearance in your enclosure. The undervoltage release adds a coil draw; confirm the control transformer sizing if you're adding this to an existing panel with other UVR coils. The auxiliary switches (2 HQ) occupy the same physical space; no extra side-mount bracket needed.
Selectivity & coordination
With 75.6 kA at 240 V and 52.5 kA at 415 V, this breaker provides strong selectivity downstream of a larger MCCB or upstream of miniature breakers. The 63 A frame (rated at 63 A up to 50 °C, then derating) means it's sized for a 63 A feeder or a large motor branch circuit. The 800 V rated insulation voltage (Ui) gives margin for 480/600 V systems. The undervoltage release is factory-integrated — no field add-on module needed.