The Siemens 3VA2563-6KQ32-0HC0 is a 3-pole IEC frame 1000 circuit breaker in breaking capacity class H, rated for an ultimate short-circuit breaking capacity Icu of 85 kA at 415 V AC. The electronic trip unit is an ETU860 with LSIG protection (Long-time, Short-time, Instantaneous, Ground-fault). Overload protection Ir is adjustable from 250 A to 630 A, short-circuit protection Isd from 0.6 to 10× In, and instantaneous Ii from 1.5 to 12× In. Ground-fault protection Ig can be switched off or set from 0.2 to 1× In with a time delay tg of 0.05 to 0.8 seconds. This variant includes a shunt trip on the left side, 24 V AC 50/60 Hz / 24–30 V DC, plus a nut keeper kit and provisions for two auxiliary contacts.
DIN-rail and panel integration
At 630 A continuous rating, the breaker draws significant heat; ensure the panel ventilation and busbar sizing match the manufacturer's mounting clearance recommendations — side-by-side derating applies if you pack multiple breakers without spacing.