The Siemens SENTRON 3VA2163-6HN32-0BH0 is a 3-pole molded case circuit breaker (MCCB) rated for a continuous current Iu of 63 A, configured for line protection. It carries a breaking capacity of 242 kA at 240 V, stepping down to 187 kA at 415 V and 440 V, 121 kA at 500 V, and 5 kA at 690 V — the voltage-dependent curve you need for selectivity studies. The overcurrent release is an ETU350 electronic trip unit, and the breaker includes an undervoltage release (UVR) as the auxiliary release design. This is a current-production part, actively manufactured.
What the ratings mean for your panel
The 63 A rating holds flat from 40 °C through 50 °C ambient — no derating needed in a typical ventilated enclosure. At 55 °C it drops to 60.6 A, at 60 °C to 58.3 A, at 65 °C to 55.9 A, and at 70 °C to 53.6 A. If your panel runs hot, that thermal curve governs the actual continuous current the breaker can carry without nuisance tripping. The rated insulation voltage Ui of 800 V means the internal clearances and creepage are designed for 800 V phase-to-phase, so this MCCB is suitable for 690 V systems (the highest voltage where a breaking capacity is listed) without derating the insulation. The auxiliary contact version is 2 auxiliary switches plus 1 trip alarm switch (HQ type), giving you three separate signal paths — two for status feedback (open/closed) and one dedicated to trip indication. The trip indicator is also present on the front face for local visual confirmation. Maximum power loss is 6.5 W — low enough that heat buildup in a standard enclosure is negligible, but worth checking if you are grouping several breakers in a sealed, non-ventilated cabinet.
Physical fit and integration
Dimensions are 181 mm height, 105 mm width, 86 mm depth. The 105 mm width is the standard 3-pole MCCB footprint for the SENTRON 3VA platform — it mounts on a mounting plate or DIN rail via the appropriate adapter, and the front face accepts the standard rotary handle or motor operator. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The storage limit governs handling and warehousing, not running conditions.