What this MCCB is and what it protects
The Siemens 3VA2163-5MN32-0KL0 is a SENTRON molded case circuit breaker (MCCB) built for motor protection duty. It carries a continuous 63 A rating across the full ambient range from 40 °C to 70 °C — no derating needed in a warm enclosure. The interrupting capacity hits 187 kA at 240 V, 121 kA at 415 V, and still 75.6 kA at 500 V, so it handles high-fault utility feeds and large motor branch circuits without cascading upstream. Phase failure detection is built in, and the design includes a shunt trip release plus a full set of auxiliary switches: two auxiliary, one trip alarm, and one electrical alarm switch.
Panel fit and wiring notes
The 3VA2163-5MN32-0KL0 measures 105 mm wide, 181 mm high, and 86 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures. Power loss is 4 W maximum, so heat dissipation is minimal inside a sealed cabinet. Operating range spans -25 °C to 70 °C; storage range goes from -40 °C to 80 °C. The shunt trip release allows remote tripping from a PLC or emergency-stop circuit, and the auxiliary switch complement gives you two form-C contacts for status feedback plus separate trip and alarm signals.