What the ratings mean for your panel
The Siemens SENTRON 3VA2163-7HN32-0KA0 is a 3-pole molded case circuit breaker rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to the top of the enclosure's thermal rise. That 63 A holds steady at every temperature step in the evidence, so the breaker delivers its full nameplate even when packed into a crowded switchboard. The breaking capacity is the headline number for fault protection: 242 kA at 415 V and 330 kA at 240 V. At 500 V it still clears 187 kA. That puts this breaker in the high-fault-current tier — sized for the main incoming feeder or a large sub-distribution board where the available fault current from the transformer is substantial. At 690 V the rating drops to 3.7 kA, so if you are on a 690 V system this is not the primary fault-interrupting device; it serves as a downstream load-break switch in that voltage class. The shunt trip release (STL) is built in — no auxiliary switch fitted. That means remote tripping via a control voltage is standard, useful for emergency-stop circuits or supervisory shutdown from a PLC. No undervoltage release, no ground-fault monitoring, and no communication function on this variant; it is a straight line-protection breaker with a single remote-trip coil.
Panel fit and integration
Dimensions: 105 mm wide, 181 mm tall, 86 mm deep. Operating temperature range: -25 °C to 70 °C, storage from -40 °C to 80 °C. That covers unheated electrical rooms, outdoor switchgear cabinets, and most industrial environments. Maximum power loss is 4 W — negligible for thermal budgeting in a multi-breaker panel.