What this MCCB carries and where it fits
The Siemens 3VA1163-5EE32-0KH0 is a 3-pole SENTRON molded case circuit breaker (MCCB) rated 63 A at 40 °C, with a 187 kA interrupting capacity at 240 V AC — that's the headline number that tells you it handles high-fault utility feeds or transformer secondaries without upstream fuses. At 415 V it still breaks 121 kA, and at 690 V it holds 17 kA, so it's sized for industrial distribution where fault current varies by voltage level. Rated insulation voltage is 800 V, meaning the internal clearances and creepage are designed for 690 V systems with margin. The thermal derating curve is flat from 40 °C to 50 °C (still 63 A), then drops to 58 A at 70 °C — useful to know if this lands in a hot panel next to drives or transformers. It ships with a shunt trip release (STL) and a 2-auxiliary-switch plus 1-trip-alarm-switch HQ configuration, so it's ready for remote tripping and status feedback without ordering add-on modules separately.
Panel fit and physical integration
Footprint is 76.2 mm wide by 130 mm tall by 70 mm deep — a standard 3-pole MCCB width that fits most DIN-rail or panel-mount enclosures without re-drilling. The 70 mm depth leaves room for rear-access busbars or cable ladders behind the breaker. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C. Max power loss is 17.3 W — factor that into enclosure thermal calculations if the panel is tightly packed.