What this MCCB carries and where it fits
The Siemens 3VA1163-5EF36-0JC0 is a SENTRON 3-pole molded case circuit breaker rated 63 A continuous at 40 °C, with a 187 kA interrupting capacity at 240 V and 121 kA at 415 V — numbers that put it squarely in high-fault-duty distribution, not light branch protection. Rated insulation voltage is 800 V, so it handles 480/600 V class panels without derating the insulation path. The frame includes a factory-fitted shunt trip (STL) and two HQ auxiliary switches — that means remote trip capability and status feedback are built in, no add-on modules to order separately. Thermal derating is mild: still 63 A at 50 °C, 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, 58 A at 70 °C — so in a warm panel you lose only 5 A from the nameplate rating at the upper end. Power loss maxes at 17.3 W — relevant if you're packing several breakers in a closed enclosure and need to budget heat rise.
Physical fit and panel integration
Dimensions: 130 mm tall, 76.2 mm wide, 70 mm deep — standard 3-pole MCCB footprint for DIN-rail or screw-mount panel assembly. Operating range -25 °C to 70 °C; storage from -40 °C to 80 °C — fine for unheated electrical rooms or outdoor enclosures with heaters.