{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1911-1FA22","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1911-1FA22","canonicalUrl":"https://aoctrl.com/siemens/3RH1911-1FA22","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1FA22","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH1911-1FA22 auxiliary switch block, 2 NO + 2 NC contacts, screw-type terminals, size S00, snap-on mounting, rated 10 A maximum.","salesMarkdown":"It snaps onto size S00 contactor relays and power contactors in the SIRIUS family, adding auxiliary signal feedback or interlocking without extra panel wiring. The block is rated for a maximum of 10 A, with contact ratings that vary by voltage — 6 A at 24 V, 6 A at 230 V, and 3 A at 400 V, for example — so the actual switching capacity depends on the control voltage in your circuit. ## Contact ratings and reliability At 24 V DC the continuous rating is 10 A; at 110 V DC it drops to 3 A; at 220 V DC it is 1.2 A. For AC loads at 230 V the rating is 6 A, and at 400 V it is 3 A. The block carries a mechanical service life of 10 million switching cycles typical, and contact reliability is specified at 1 faulty switching per 100 million operations at 17 V, 1 mA — a figure that matters for low-energy signal circuits where oxide film on dry contacts can cause intermittent failures. Snap-on mounting directly onto the contactor — no tools needed. The block fits size S00 contactors (36.5 mm wide, 41.5 mm deep, 37.5 mm high). Screw terminals accept 2x (0.5... 1.5 mm²) or 2x (0.75... 2.5 mm²) with core end processing, or 2x (20... 16) and 2x (18... 14) AWG. Front-side protection class is IP20, so it is suitable for enclosed panel environments but not washdown or outdoor exposure.","metaTitle":"Siemens 3RH1911-1FA22 Auxiliary Switch Block, 2NO+2NC, S00,","metaDescription":"Siemens SIRIUS 3RH1911-1FA22 auxiliary switch block, 2NO+2NC, screw terminals, 10A max, snap-on for S00 contactors. Phased-out; successor 3RH2911-1FA22. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Note":"with 3RH1","Depth":"41.5 mm","Width":"36.5 mm","Height":"37.5 mm","Maximum":"10 A","at 24 V":"6 A","at 60 V":"2 A","at 110 V":"1 A","at 125 V":"6 A","at 220 V":"0.3 A","at 230 V":"6 A","at 250 V":"6 A","at 400 V":"3 A","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","Product Brand Name":"SIRIUS","Suitability For Use":"Contactor relay and power contactor","at 24 V rated value":"10 A","at 60 V rated value":"4.7 A","at 110 V rated value":"3 A","at 220 V rated value":"1.2 A","at 440 V rated value":"0.5 A","at 600 V rated value":"0.26 A","Instantaneous Contact":"2","With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","at AC-15 at 690 V rated value":"1 A","protection class IP on the front":"IP20","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Mechanical Service Life (Switching Cycles) Typical":"10 000 000","Type Of Electrical Connection For Auxiliary And Control Circuit":"screw-type terminals","insulation voltage with degree of pollution 3 at AC rated value":"690 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=19463&mlfb=3RH1911-1FA22","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1FA22/alternatives.json"},"ai":{"faq":[{"question":"What replaces 3RH1911-1FA22?","answer":"The official successor is the SIRIUS 3RH2911-1FA22. It has the same 2NO+2NC contact arrangement, screw terminals, and S00 snap-on mounting."},{"question":"Will 3RH1911-1FA22 drop into a panel wired for 3RH2122-1WB40?","answer":"No — the 3RH2122-1WB40 is a different form factor (45 mm wide, 73 mm deep) with a built-in coil and varistor, designed as a coupling relay. The 3RH1911-1FA22 is a passive auxiliary switch block that snaps onto a separate contactor. They are not footprint-compatible without rewiring and re-paneling."},{"question":"Where can I buy 3RH1911-1FA22?","answer":"This phased-out part is sourced and quoted to order through independent distribution. Availability and current pricing are confirmed at quote time against an RFQ."},{"question":"What is the contact rating at 24 V DC?","answer":"The auxiliary contacts are rated 10 A at 24 V DC (AC-15/DC-13 duty). At 24 V AC the rating is 6 A."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1911-1FA22","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3RH1911-1FA22 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}