What It Is and Where It Fits
The Siemens SIRIUS 3RH1911-1FA22-ZW96 is an auxiliary switch block with a 2 NO + 2 NC contact configuration, designed for use with contactor relays and power contactors in the SIRIUS family. It snaps onto a DIN rail and uses screw-type terminals for the auxiliary and control circuits, accepting 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) with core end processing. The block is rated for a maximum of 10 A, with specific contact ratings across voltages: 6 A at 24 V, 6 A at 125 V, 6 A at 230 V, 6 A at 250 V, 3 A at 400 V, and 0.3 A at 220 V. It carries a mechanical service life of 10,000,000 switching cycles typical, and a contact reliability of 1 faulty switching per 100 million operations at 17 V, 1 mA.
Sourcing and Lifecycle Reality
This part is listed as a phased-out product. The official successor is the SIRIUS 3RH2 series. For procurement, the 3RH1911-1FA22-ZW96 is sourced to order against an RFQ through independent distribution channels; availability and current pricing are confirmed at quote time. The lifecycle stage is marked as current, meaning the transition is underway but the part is still in the supply chain for BOM fulfillment and spares.
Panel Integration and Ratings
The block measures 36.5 mm wide, 37.5 mm high, and 41.5 mm deep, fitting into the size S00 footprint. Snap-on mounting onto a 35 mm DIN rail is standard, and the IP20 protection class on the front means it is suitable for enclosed panel use where no washdown or dust ingress is expected. The surge voltage resistance is rated at 6 kV, and the insulation voltage with degree of pollution 3 is 690 V AC. Operating temperature range is -25 to +60 °C, with storage from -55 to +80 °C.