What this 3VA2 breaker carries
The Siemens 3VA2563-5MN32-0AJ0 is a 3-pole IEC frame 1000 molded case circuit breaker with breaking capacity class M, rated Icu=55kA at 415 VAC. It is fitted with an ETU350M electronic trip unit providing LSI protection (long-time, short-time, instantaneous). The continuous current rating In is 630 A, with overload protection Ir adjustable from 250 A to 630 A, short-circuit pickup Isd adjustable 3 to 15 times Ir, and instantaneous pickup Ii fixed at 15 times In. The unit includes a nut keeper kit, two HP auxiliary switches, and one HP trip alarm switch — pre-configured for motor protection duty.
The 55 kA Icu at 415 V places this breaker in the M (medium) breaking capacity class per IEC 60947-2 — sufficient for most industrial main and feeder applications where fault levels stay under that threshold. The ETU350M LSI trip gives selective coordination capability: adjustable Ir matches the motor full-load current, Isd allows time-delayed short-circuit protection to ride through inrush, and Ii at 15 x In clears hard faults fast. The integrated auxiliary switches and trip alarm switch eliminate the need for separate accessory wiring in the panel.