What this MCCB delivers
The Siemens SENTRON 3VA2163-5HN32-0HH0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 63 A and a rated insulation voltage of 800 V. Its ETU350 electronic trip unit provides adjustable overload and short-circuit protection, with a trip indicator and voltage trigger for remote signaling. The 187 kA breaking capacity at 240 V means it can safely interrupt very high fault currents without upstream cascading — essential for high-available short-circuit current panels near transformers or large motor banks.
Breaking capacity across voltages
Breaking capacity drops with system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 4.25 kA at 690 V. The 690 V figure is low enough that coordination studies should verify selectivity at that voltage level.
Thermal derating and ambient limits
Rated 63 A from 40 °C through 50 °C ambient. Above 50 °C the current must be derated: 60.6375 A at 55 °C, 58.275 A at 60 °C, 55.9125 A at 65 °C, and 53.55 A at 70 °C. Operating ambient range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The 4 W maximum power loss is modest for a 63 A frame — panel ventilation is still advisable in sealed enclosures.
Auxiliary and trip options
Comes with 2 auxiliary switches plus 1 trip alarm switch (HQ type) and a shunt trip (STL) for remote tripping. The integrated auxiliary trip is order code 3VA9688-0BL30. No undervoltage release, no ground fault monitoring, no communication function, no phase failure detection — this is a straightforward line-protection breaker without add-on modules.