What this 3VA2 breaker delivers
The Siemens 3VA2463-6JP32-0AL0 is a 3-pole IEC frame 630 circuit breaker with a class H breaking capacity — Icu of 85 kA at 415 V. The ETU550 trip unit provides LSI protection: long-time (Ir adjustable 250 A to 630 A), short-time (Isd 0.6 to 9× In), and instantaneous (Ii 1.5 to 9× In). This selectivity profile suits it for main or tie breaker duty in a distribution board where you need to coordinate with downstream feeders.
The breaker ships with two auxiliary switch changeover contacts (H type) and one trip alarm switch changeover contact already fitted. The neutral conductor protection option requires an external current transformer, which is not in the box.