The 3VA2580-7MN32-0BL0 is a Siemens 3VA2 IEC frame 1000 molded-case circuit breaker, 3-pole, rated In=800 A with a breaking capacity class C Icu=110 kA at 415 V. The ETU350M trip unit provides LSI protection (long-time, short-time, instantaneous) with overload protection Ir adjustable from 320 A to 800 A and short-circuit protection Isd adjustable from 3 to 15 times Ir, plus a fixed instantaneous pickup Ii=15 x In. This is a motor-protection breaker, so the LSI curve is shaped to ride through motor inrush while clearing a bolted fault fast. The release is wired in series with the 24 V DC control supply; if that supply fails, the breaker opens immediately.
The 3VA2 frame 1000 is a bolted-front connection breaker, not a plug-in unit — expect bus-bar or cable lugs on the line and load sides. The nut keeper kit (included in the order code suffix) retains the terminal nuts during installation, a small time-saver in a crowded enclosure. The undervoltage release adds a pair of control wires to the 24 V DC bus; plan for a dedicated fuse or breaker on that circuit per Siemens wiring guidelines.