{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-2FB11","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-2FB11","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-2FB11","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2FB11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, 1 NO + 1 NC, 10 A rated, spring-loaded terminals, snap-on front mount for 3RT2 contactors and 3RH2 contactor relays.","salesMarkdown":"The Siemens SIRIUS 3RH2911-2FB11 is a front-mounted auxiliary switch block for the 3RT2 contactor and 3RH2 contactor relay series. It provides one normally-open (leading) and one normally-closed (lagging) contact pair, wired to spring-loaded terminals that accept 2x (0.5...2.5 mm²) without ferrules or 2x (0.5...1.5 mm²) with core-end processing. The snap-on fastening method means it clips directly onto the contactor front face with no tools — a clean retrofit when you need extra signal feedback or interlocking on a motor starter. The maximum thermal current is 10 A, but the real-world switching capacity depends on the voltage and load type. For AC-15 pilot-duty loads (solenoid valves, contactor coils, relays) at 24 V, the rated operational current is 6 A; at 230 V it's also 6 A, and at 400 V it drops to 3 A. For DC switching, the same contact set handles 10 A at 24 V, 4.7 A at 60 V, 3 A at 110 V, and tapers to 0.26 A at 600 V. The AC-15 rating at 690 V is 1 A. ## Mechanical life and environment Rated for 10 million mechanical operating cycles typical, so it will outlast most contactors it rides on.","metaTitle":"Siemens 3RH2911-2FB11 SIRIUS Auxiliary Switch, 1NO+1NC, 10A","metaDescription":"Siemens SIRIUS 3RH2911-2FB11 auxiliary switch block, 1 NO + 1 NC, rated 10 A, spring-loaded terminals, snap-on mount for 3RT2/3RH2 contactors. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"47.7 mm","Width":"36 mm","title":"3RH2911-2FB11","Height":"41.5 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","description":"auxiliary switch, on the front, 1 NO + 1 NC, 11 U,.7/.8, --/--,.5/.6, --/--, current path: 1 NO (leading), --, 1 NC (lagging), --, spring-loaded terminal, for contactors 3RT2 and contactor relays 3RH2","During Storage":"-55 ... +80 °C","Leading Contact":"1","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","Lagging Switching":"1","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":"0","With Core End Processing":"2x (0.5 ... 1.5 mm²)","Without Core End Processing":"2x (0.5 ... 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 ... 14)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Mechanical Service Life (Operating Cycles) Typical":"10 000 000","Type Of Electrical Connection For Auxiliary And Control Circuit":"spring-loaded terminals","insulation voltage with degree of pollution 3 at AC rated value":"690 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d83f7a30875232fd46ef82dccf2c9d19.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=13761&mlfb=3RH2911-2FB11"},"ai":{"faq":[{"question":"What does the 3RH2911-2FB11 fit?","answer":"It is a front-mounted auxiliary switch block designed for Siemens SIRIUS 3RT2 contactors and 3RH2 contactor relays. It snaps on without tools and connects via spring-loaded terminals."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-2FB11","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/3RH2911-2FB11 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}