What this MCCB carries
The Siemens SENTRON 3VA1063-3ED32-0BA0 is a 3-pole molded case circuit breaker rated 63 A at 40 °C, designed for line protection. It ships with an undervoltage release (UVR) built in — that's the -0BA0 suffix telling you the UVR is factory-fitted, not a field-add. Breaking capacity runs 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at both 500 V and 690 V. That's enough headroom for most industrial panel secondary faults without cascading upstream.
Thermal derating and panel fit
Full 63 A holds through 50 °C; at 55 °C it's 62 A, at 65 °C it's 60 A, and at 70 °C it's 58 A. If your panel ambient runs hot, you still get nearly full rating — no big step-down until you're past 70 °C. Dimensions are 70 mm deep, 76.2 mm wide, 130 mm tall — a standard 3-pole MCCB footprint that drops onto a DIN rail or direct-mount plate without re-drilling.