The Siemens 3VA2580-5HN42-0HA0 is a 4-pole IEC frame 1000 circuit breaker rated 800 A continuous, with a breaking capacity class M delivering Icu=55 kA at 415 V AC. The ETU350 electronic trip unit provides LSI protection — long-time (Ir adjustable 320 A to 800 A), short-time (Isd 1.5 to 10 x Ir), and instantaneous (Ii fixed at 12 x In). The neutral conductor protection is adjustable to OFF, 50%, or 100% of the phase setting. A factory-fitted shunt trip on the left side, rated 24 V AC 50/60 Hz or 24–30 V DC, allows remote tripping for emergency-stop or supervisory control circuits.
The 4-pole footprint and shunt trip occupy the left accessory slot; verify clearance for the shunt wiring before finalizing the gland-plate layout.