The Siemens 3VA2463-5HM32-0DC0 is a 3-pole IEC molded case circuit breaker from the 3VA2 frame, rated 630 A with a breaking capacity class M — Icu of 55 kA at 415 V AC. That rating means it can safely interrupt a fault current up to 55 kA without welding or rupturing, which is the standard for main or feeder breakers in industrial panels where available fault current is high. The ETU330 electronic trip unit provides LIG protection: long-time (overload) adjustable from 250 A to 630 A, short-time (instantaneous) from 1.5 to 9× In, and ground-fault pickup from 0.2 to 1× In with a time delay of 0.1 or 0.3 s. It ships with an undervoltage release rated 208–230 V AC 50/60 Hz and a nut keeper kit, plus two auxiliary switch changeover contacts.
What the ratings mean for fit
The 630 A frame and 55 kA Icu at 415 V place this breaker squarely in main or heavy-feeder duty for 400 V class industrial panels. The ETU330 LIG trip unit covers the three protection curves needed for grounded-wye systems: overload (Ir), short-circuit (Ii), and ground-fault (Ig with adjustable time delay). The undervoltage release (208–230 V AC) drops the breaker when control voltage is lost — common for emergency-stop or safety circuits. Two auxiliary changeover contacts provide status feedback to a PLC or annunciator panel.