The Siemens 3VA2463-6HN42-0KJ0 is a 4-pole IEC frame 630 circuit breaker with a class H breaking capacity of 85kA at 415V. It carries an ETU350 LSI trip unit, adjustable overload protection from 250A to 630A, and short-circuit protection set at 1.5 to 9 times Ir with an instantaneous pickup of 9x In. The neutral conductor protection can be set to OFF, 50%, or 100% of phase protection. A factory-fitted shunt trip (left side, 208-277V AC / 220-250V DC) and two auxiliary switch channels are included, plus a nut keeper kit for secure mounting.
What the ratings mean for fit
The 85kA Icu at 415V class H rating means this breaker can safely interrupt fault currents up to that level on a 415V system without failing catastrophically — critical for high-fault-capacity industrial feeds like transformer secondaries or large motor control centers. The ETU350 LSI trip unit provides electronic long-time, short-time, and instantaneous protection, giving you selectivity coordination with downstream devices. The adjustable N protection (OFF, 50%, 100%) lets you match the breaker to a 4-wire system where neutral loading varies.
Panel integration
The 3VA2 frame mounts onto a DIN rail or panel-mount adapter in standard switchgear enclosures. The shunt trip and auxiliary switches are pre-installed on the left side, so verify clearance for wiring access and any right-side accessories you may add later. The nut keeper kit simplifies torque-down on the main lugs — no loose washers to drop into a live panel.