The Siemens 3VA2463-8HN32-0DJ0 is a 3-pole IEC frame 630 circuit breaker rated for line protection with an ETU350 LSI trip unit. Its headline rating is a breaking capacity class L with Icu=150kA @ 415V — that means it can safely interrupt a fault current up to 150,000 amps at 415 VAC without damage, which is the spec that governs selectivity and SCCR coordination in a distribution board. The continuous current rating In is 630A, with overload protection Ir adjustable from 250A to 630A, short-circuit protection Isd from 1.5 to 9 times Ir, and instantaneous pickup Ii fixed at 9 times In.
This breaker includes a factory-fitted undervoltage release rated 208-230 V AC 50/60 Hz, which drops the breaker on loss of control voltage — a common requirement for emergency-stop and safety isolation circuits. The nut keeper kit is included for secure mounting in the panel. The 2 auxiliary switches provide status feedback to a PLC or indication lamp.
The ETU350 LSI trip unit gives you adjustable long-time (Ir), short-time (Isd), and instantaneous (Ii) protection curves, so it can be coordinated downstream with smaller breakers or fused switches. The 150kA @ 415V breaking capacity class L rating means this breaker is sized for high-fault-current installations — typically main or tie breakers in industrial switchboards where the available fault current exceeds 100 kA.