Rated current and thermal performance
The Siemens 3VA2163-0KQ32-0AA0 is a 3-pole SENTRON molded case circuit breaker rated for 63 A continuous current, with no derating required from 40 °C through 70 °C — the full 63 A holds across the entire operating temperature range. That flat thermal curve simplifies panel sizing: no need to uprate the frame for elevated ambient temperatures inside a crowded enclosure.
That 440 kA figure at 415 V puts this breaker well into high-fault-duty territory — suitable for main or tie positions in large LV switchboards where upstream transformer ratings push prospective fault current past 100 kA.
Electronic trip unit and protection functions
Communication function is onboard — the ETU860 platform supports Modbus RTU and PROFIBUS via optional modules, making it suitable for power-monitoring schemes in a switchgear lineup.