What the breaking capacity numbers mean for your panel
The 3VA1063-4ED36-0KC0 is a 3-pole SENTRON molded case circuit breaker rated for line protection — the primary disconnect on a feeder or a large motor branch. Its interrupting ratings climb with voltage: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V. That 121 kA figure at 240 V is the headline number; it tells you this breaker can clear a bolted fault on a low-impedance 240 V bus without the arc re-striking. At 415 V the 75.6 kA still covers most industrial transformer-secondaries. The 690 V rating is lower, but at that voltage you are typically feeding a medium-voltage step-down anyway.
Thermal derating and the TM210 release
Rated continuous current Iu is 63 A, and the breaker holds that rating from 40 °C through 50 °C ambient. Above that it starts to step down: 60.48 A at 55 °C, 59.22 A at 60 °C, 57.96 A at 65 °C, and 56.7 A at 70 °C. If your panel ambient runs hot — say a packed enclosure next to a furnace line — size the load at the 60 °C figure, not the nameplate 63 A. The overcurrent release is a TM210, a thermal-magnetic unit with fixed thermal and magnetic trip settings; no field-adjustable electronic curves here. The rated insulation voltage is 800 V, which covers 690 V systems with margin.
Integrated shunt trip and auxiliary contacts
This variant ships with a factory-installed shunt trip (STL) — order code 3VA9688-0BL33 for the release module itself — and two HQ auxiliary switches. The shunt trip lets a remote signal (E-stop, PLC output, fire alarm relay) trip the breaker by energizing the release coil. The HQ aux switches provide status feedback: open/closed indication back to the controller or SCADA. No undervoltage release, no ground-fault monitoring, no communication module on this build. If you need remote reset or Modbus telemetry, you are looking at a different 3VA variant.
Panel fit and environment
Dimensions: 130 mm height, 76.2 mm width, 70 mm depth. The 76.2 mm width is a standard 3-pole MCCB footprint — it fits the same DIN-rail or panel-mount cutout as other 3VA 3-pole units. Front protection is IP40, which means tools or fingers cannot touch live parts but the breaker is not sealed against dust ingress. Operating temperature range is -25 °C to 70 °C; storage from -40 °C to 80 °C. The depth of 70 mm leaves room for rear busbar connections in a typical 200 mm deep enclosure.