The Siemens 3VA2463-5KQ32-0AH0 is a 3-pole IEC frame 630 molded-case circuit breaker in the 3VA2 series, rated for breaking capacity class M with an Icu of 55 kA at 415 V AC. It carries the ETU860 electronic trip unit configured for LSIG protection — long-time, short-time, instantaneous, and ground-fault — with an In of 630 A. Overload protection (Ir) is adjustable from 250 A to 630 A; short-circuit protection (Isd) from 0.6 to 9 times In, and instantaneous pickup (Ii) from 1.5 to 9 times In. Ground-fault protection is switchable, with pickup (Ig) from 0.2 to 1 times In and time delay (tg) from 0.05 to 0.8 seconds. The breaker ships with two auxiliary switches and one trip alarm switch.
What the Ratings Mean for Fit
The 55 kA Icu at 415 V defines the maximum short-circuit current the breaker can safely interrupt without damage — critical for verifying SCCR compliance at the panel level. The ETU860's LSIG profile covers full-spectrum protection: long-time for cable/overload, short-time and instantaneous for bolted faults, and ground-fault for arcing or leakage paths. The adjustable ground-fault delay (0.05–0.8 s) allows coordination with downstream devices. Two auxiliary switches and one trip alarm switch provide status feedback for PLC or SCADA inputs.