What it is and what it does
The Siemens 3VA1063-4ED36-0AH0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection — the primary role is guarding feeder circuits against overload and short-circuit faults in distribution panels. It carries a continuous current rating of 63 A at 40 °C, derating to 58 A at 70 °C, so the thermal curve is predictable across a warm enclosure. The TM210 overcurrent release combines a thermal bimetal for overloads and a magnetic coil for short-circuits; no electronic adjustment, which means the trip curve is fixed and field-tamper-proof.
Breaking capacity — where it clears faults
Breaking capacity varies sharply with system voltage: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. That 11.9 kA at 690 V is the limiting figure for high-voltage distribution — if your fault current exceeds that at 690 V, you need a higher-rated frame. The rated insulation voltage is 800 V, so the internal clearances are designed for 690 V line-to-line service with margin.
Panel integration and auxiliary wiring
The breaker ships with a complement of 2 auxiliary switches plus 1 trip alarm switch (HQ type), factory-fitted. That covers status feedback and remote trip indication without ordering add-on modules separately. Dimensions are 76.2 mm wide, 130 mm tall, 70 mm deep — standard 3-pole MCCB footprint for DIN-rail or panel-mount enclosures. Power loss at rated current is 17.3 W maximum, so account for that heat in a sealed cabinet with limited convection.