What this 3VA2 breaker delivers
The Siemens 3VA2463-5HN32-0AK0 is a 3-pole IEC frame 630 molded case circuit breaker with breaking capacity class M, meaning it interrupts 55 kA at 415 V AC — enough headroom for most industrial main or feeder applications where the available fault current sits in that range. The ETU350 electronic trip unit gives LSI protection: long-time (Ir adjustable 250 A to 630 A), short-time (Isd 1.5 to 9× Ir), and instantaneous (Ii fixed at 9× In). That selectivity lets you coordinate downstream breakers without nuisance tripping on motor inrush or transformer energization.
The ETU350's LSI curve is field-adjustable — Ir covers 250 A to 630 A, so a single frame size handles multiple load calibers. The built-in auxiliary switch (changeover H) and trip alarm switch (changeover) give the PLC or BMS a positive status signal without an add-on module.