The Siemens 3VA2440-5HN32-0LJ0 is a 3-pole IEC frame 630 circuit breaker in the 3VA2 series, rated for line protection with an ETU350 LSI trip unit. Its breaking capacity class M delivers Icu=55 kA at 415 V, which means it can safely interrupt fault currents up to that level without upstream cascading — a key figure for selectivity studies on a 400 V distribution board feeding motor control centers or refrigeration compressor banks.
Rated In=400 A, with overload protection Ir adjustable from 160 A to 400 A, short-circuit protection Isd from 1.5 to 10 x Ir, and instantaneous pickup Ii fixed at 12 x In. The universal release (UNI) operates on 24 V DC, and the breaker ships with a nut keeper kit plus two auxiliary switches (HP) and one trip alarm switch (HP) — enough auxiliary contacts for remote status feedback on a PLC input card without adding a separate block.