The Siemens 3VA2463-5HN32-0KB0 is a 3-pole IEC molded-case circuit breaker in the 3VA2 frame, rated at 630 A continuous current with a breaking capacity of 55 kA at 415 V (class M). That 55 kA Icu means it can safely interrupt a fault up to that level without welding its contacts or venting arc gas into the panel — critical for high-fault installations like motor control centers or transformer secondaries where the available fault current is substantial.
Protection and accessories
The ETU350 electronic trip unit provides LSI protection: long-time pickup Ir adjustable from 250 A to 630 A, short-time pickup Isd from 1.5 to 9× Ir, and instantaneous pickup Ii fixed at 9× In. That adjustability lets you fine-tune overload and short-circuit coordination on the line — useful when the breaker feeds a mix of motor and resistive loads. The breaker ships with a shunt trip (STL) rated 220–250 V DC and 208–277 V AC, plus two auxiliary switches (HP) for remote status feedback.