The Siemens 3RV2011-1FA15-ZW96 is a SIRIUS motor-protective circuit breaker designed to protect motors against overload, short circuit, and phase failure.
Rated breaking capacity hits 100 kA at 240 V, 400 V, and 500 V, dropping to 4 kA at 690 V. That 100 kA figure at common industrial voltages (400 V three-phase) means this breaker can clear a bolted fault without upstream devices having to open — it's selective with most standard feeder breakers in the panel. No ground fault detection here, so if that's needed, you'll add a separate GF relay or specify a different variant.
At 45 mm wide, it occupies a single DIN-rail module space. The screw-type terminals accept 2x 0.5–1.5 mm² or 2x 0.75–2.5 mm² solid or stranded copper. Use M3 screws for the main contacts. Rated operational voltage spans 20 to 690 V AC, covering most low-voltage industrial systems. The auxiliary contact ratings vary by voltage: 1 A at 24 V, 0.5 A at 120/125/230 V, and 0.15 A at 60 V.