The Siemens 3VA2563-5MN32-0KH0 is a 3-pole motor protection circuit breaker in the 3VA2 IEC frame 1000 platform, rated In=630 A with a breaking capacity class M delivering Icu=55 kA at 415 V. The ETU350M trip unit provides LSI protection — overload (Ir) adjustable 250 A to 630 A, short-time (Isd) 3 to 15 × Ir, and instantaneous (Ii) fixed at 15 × In. That 55 kA interrupting rating at 415 V means it clears bolted faults up to that level without upstream fuses needing to open, which simplifies selective coordination in motor control centers.
The breaker ships with a nut keeper kit and includes a shunt trip (STL) rated 220-250 V DC or 208-277 V AC, plus two HQ auxiliary switches and one HQ trip alarm switch. The shunt trip allows remote tripping from a safety PLC or emergency-stop circuit — common in conveyor and pump protection schemes where the breaker sits in a motor control center bucket. The HQ auxiliary switches provide position feedback to the control system.