The Siemens 3VA2463-6KQ32-0KG0 is a 3-pole IEC frame 630 molded case circuit breaker from the SENTRON 3VA2 series, fitted with an ETU860 LSIG electronic trip unit and rated In=630A. Its breaking capacity class H delivers Icu=85kA at 415V AC — sufficient for high-fault utility or transformer-fed main feeders in industrial switchboards. The ETU860 provides full LSIG protection: long-time pickup Ir adjustable 250-630A, short-time pickup Isd 0.6-9x In, instantaneous Ii 1.5-9x In, and ground-fault pickup Ig 0.2-1x In with time delay tg 0.05-0.8s. The shunt trip (left side, 208-277V AC 50/60Hz) allows remote tripping, and the included 1 auxiliary switch HP plus 1 trip alarm switch HP feed status back to a PLC or annunciator panel.
What the ratings mean for fit
The 85kA Icu at 415V AC places this breaker in breaking capacity class H per IEC 60947-2 — it can safely interrupt a fault current up to 85kA without damage, which is the rating that governs its use on high-capacity transformers or near utility service entrances. The ETU860 LSIG trip unit is fully adjustable: Ir (long-time pickup) from 250A to 630A lets you match the cable or bus rating, Isd (short-time) from 0.6 to 9x In gives selective coordination with downstream breakers, and Ii (instantaneous) from 1.5 to 9x In handles high-inrush loads like motor starters. The ground-fault function (Ig 0.2-1x In, tg 0.05-0.8s) provides equipment protection on solidly-grounded systems; for N-conductor protection, an external current transformer can be added. The shunt trip operates on 208-277V AC control power — verify that your control voltage matches before wiring.
Panel integration
This is a fixed (non-withdrawable) 3-pole MCCB designed for bolted connection in a distribution panel or switchboard. It occupies the standard 3VA2 frame 630 footprint — check the Siemens mounting pattern and bus-bar drill plan before laying out the enclosure. The ETU860 is powered by internal current sensing; no external control power is needed for the trip unit itself. The shunt trip and auxiliary/trip alarm switches require wiring back to the control circuit. The breaker accepts line and load side lugs or bus-bar adapters; verify lug ampacity for 630A continuous current.