The Siemens 3VA1163-3EF32-0KC0 is a 3-pole SENTRON molded case circuit breaker rated for line protection, carrying a continuous current Iu of 63 A at 40 °C and holding that rating through 50 °C before a mild derating curve begins at 55 °C. Breaking capacity is voltage-dependent: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V — figures that govern the available fault current the breaker can safely interrupt at the point of installation.
What the ratings mean for fit
The 63 A continuous rating at 40 °C is the thermal baseline for sizing the breaker to the load. The TM240 overcurrent release provides fixed thermal-magnetic protection — no electronic adjustment, no communication, no phase-failure detection. The shunt trip (STL) auxiliary release is built in, and the breaker ships with 2 auxiliary switches HQ. The integrated auxiliary trip order code is 3VA9688-0BL33, which is the factory-matched accessory for this unit.
Panel integration and environment
Dimensions are 70 mm deep, 76.2 mm wide, and 130 mm high — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures. Front protection is IP40, meaning the operator face is protected against tools and small wires but not against water ingress; the breaker is intended for dry indoor panel environments. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.