What this MCCB carries and where it fits
The Siemens SENTRON 3VA2063-5HN32-0BA0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. That's a clean 63 A at every point in the span, so the rating holds in a warm panel without recalculating. Interrupting capacity is 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V. The 187 kA figure at 240 V covers high-fault service-entrance applications; the 121 kA at 415 V handles most European industrial distribution boards. Insulation voltage is rated 800 V. This is a line-protection design — meaning it's configured for incoming feeder or main distribution duty, not motor branch-circuit protection. It includes an undervoltage release (UVR) as the auxiliary release, so it can be tripped on loss of control voltage, which is useful for emergency-stop or undervoltage-safety schemes.
Panel fit and dimensions
Dimensions are 181 mm high, 105 mm wide, 86 mm deep. The 105 mm width is a standard 3-pole MCCB footprint for this class. Maximum power loss is 7.9 W, which is low enough that ventilation slots in a standard IP54 enclosure handle the heat without forced cooling.
What the 63 A flat rating means for your panel
The continuous current rating holds at 63 A from 40 °C through 70 °C ambient. The operating range is -25 °C to 70 °C, storage from -40 °C to 80 °C.