The Siemens 3VA2463-6KP42-0DD0 is a 4-pole IEC frame 630 molded case circuit breaker with breaking capacity class H, delivering an Icu of 85 kA at 415 V AC. It carries the ETU850 electronic trip unit configured for LSI protection — long-time (Ir), short-time (Isd), and instantaneous (Ii) — with the continuous current rating In fixed at 630 A. The overload protection Ir is adjustable from 250 A to 630 A, the short-time pickup Isd from 0.6 to 9 times In, and the instantaneous pickup Ii from 1.5 to 9 times In. Neutral conductor protection is adjustable from OFF up to 100% of the phase setting. An undervoltage release rated 208–230 V AC 50/60 Hz is integrated, along with three auxiliary switches (HQ type). A nut keeper kit is included for secure mounting.
What the ratings mean for fit
The 85 kA Icu at 415 V places this breaker in breaking capacity class H per IEC 60947-2, certifying it can interrupt fault currents up to that level without compromising the upstream installation. For a 630 A frame, the adjustable Ir from 250 A to 630 A lets you match the thermal protection to the actual load cable or busway rating, not the frame size. The Isd and Ii ranges (0.6–9× In and 1.5–9× In respectively) give selectivity headroom downstream — you can set the short-time pickup above the let-through of feeder breakers to avoid nuisance tripping on motor-start inrush. The neutral protection adjustment (OFF to 100%) is useful on 4-wire systems where the neutral conductor may be undersized relative to the phases.
Deployment context
This breaker mounts in a standard IEC distribution panel or switchboard — the nut keeper kit supplied secures it against vibration on the mounting plate. The undervoltage release (208–230 V AC) provides automatic trip on loss of control voltage, which is typical for emergency-stop circuits or mains-monitoring schemes in industrial power distribution.