What it is and what drives the fit
The Siemens 3VA2563-5MN32-0HH0 is a 3VA2 IEC frame 1000 motor protection circuit breaker, 3-pole, with a 55 kA breaking capacity at 415 V (class M). It carries an ETU350M LSI trip unit, rated In=630 A, with overload protection Ir adjustable from 250 A to 630 A and short-circuit protection Isd set 3–15 × Ir, plus instantaneous Ii fixed at 15 × In. The unit includes a shunt trip (STL) rated 12–30 V DC / 24 V AC 50/60 Hz, two auxiliary switches (HQ), and one trip alarm switch (HQ). The 55 kA Icu at 415 V means this breaker clears fault currents up to that level without upstream cascading — sized for high-fault industrial distribution panels where a lower-rated breaker would need a current-limiting upstream device. The LSI trip curve (Long-time, Short-time, Instantaneous) gives selective coordination for motor feeders: the short-time pickup Isd can be dialed to ride through motor inrush without nuisance tripping, while the instantaneous Ii at 15 × In (9450 A) catches hard faults fast.
Lifecycle and sourcing reality
For a BOM-freeze or a line-down replacement, this part is sourced to order against an RFQ. Availability and current pricing are confirmed at quote time through independent distribution.
Panel integration and wiring
The 3VA2 frame 1000 mounts on a DIN rail or panel plate; the included nut keeper kit secures the breaker in high-vibration environments like conveyor drive panels. The shunt trip coil draws power from a separate 12–30 V DC or 24 V AC supply — verify polarity for the DC version and that the control transformer can support the inrush. Two auxiliary switches (HQ) and one trip alarm switch (HQ) are factory-installed, so you get status feedback without adding external contact blocks. The trip alarm signals a fault condition independently of the aux contacts, which is useful for remote annunciation in a PLC-based motor control center.