{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-2NL22","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-2NL22","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-2NL22","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2NL22","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2911-2NL22 auxiliary switch block, front-mounted, 2 NO + 2 NC, solid-state compatible, spring-loaded terminals, snap-on mounting for contactor sizes S00, S0, S2, S3.","salesMarkdown":"## Solid-state compatible auxiliary switch for SIRIUS contactors The Siemens 3RH2911-2NL22 is a front-mounted auxiliary switch block for the SIRIUS 3RT2 contactor family, delivering 2 NO + 2 NC instantaneous contacts in a compact 36 mm wide housing that snaps onto contactor sizes S00, S0, S2, and S3. One of the NO contacts is designated solid-state compatible — rated at 0.3 A at 24 V, 48 V, and 60 V — meaning it reliably switches the low-level signals typical of PLC inputs and solid-state relays without the contact oxidation or stiction that standard auxiliary contacts can develop at milliampere loads. Contact reliability is specified at one incorrect switching operation per 100 million cycles at 5 V, 1 mA, which confirms the block is engineered for the dry-circuit switching demands of electronic control systems. ## Spring-loaded termination and panel fit All auxiliary and control circuit connections use spring-loaded terminals, accepting 2x (0.5... 2.5 mm²) solid or stranded, or 2x (20... 14 AWG) — no screwdriver torque required, which speeds panel wiring and eliminates periodic re-torquing on vibration-prone machine-tool panels. The block measures 36 mm wide × 41.5 mm high × 47.7 mm deep, and snaps onto the contactor front without additional DIN-rail space — critical when the panel is already dense and every millimeter of rail width is allocated to power components. Rated insulation voltage is 690 V at pollution degree 3, with a rated surge voltage resistance of 6 kV — figures that align with IEC 60947-5-1 requirements for auxiliary contact blocks used in 400 VAC motor control centers. Mechanical service life is 5 million operating cycles typical, which is the block's own endurance — not the contactor's — so factor this into maintenance intervals if the auxiliary block cycles at a different rate than the main power contacts.","metaTitle":"Siemens 3RH2911-2NL22 Auxiliary Switch, 2NO+2NC, Spring Term","metaDescription":"Siemens 3RH2911-2NL22 auxiliary switch block, 2 NO + 2 NC, solid-state compatible, spring-loaded terminals, snap-on for S00-S3 contactors. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"47.7 mm","Width":"36 mm","Height":"41.5 mm","at 24 V":"0.3 A","at 48 V":"0.3 A","at 60 V":"0.3 A","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","Lagging Switching":"0","Size Of Contactor":"S00, S0, S2, S3","Solid Or Stranded":"2x (0.5 ... 2.5 mm²)","Suitability For Use":"power contactor","Instantaneous Contact":"2","protection class IP on the front":"IP20","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 14)","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²)","Contact Reliability Of Auxiliary Contacts":"one incorrect switching operation of 100 million switching operations (5 V, 1 mA)","mirror contact according to IEC 60947-4-1":"No","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","Mechanical Service Life (Operating Cycles) Typical":"5 000 000","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","number of CO contacts of auxiliary contacts instantaneous contact":"0","AWG number as coded connectable conductor cross section for auxiliary contacts":"20 ... 14"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a324e996c4174ee59a05d444f000e90b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1458573&mlfb=3RH2911-2NL22","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2NL22/alternatives.json"},"ai":{"faq":[{"question":"What is the 3RH2911-2NL22 used for?","answer":"It is a front-mounted auxiliary switch block for Siemens SIRIUS 3RT2 contactors in sizes S00, S0, S2, and S3, providing 2 NO + 2 NC contacts with one NO contact optimized for solid-state / low-level signal switching."},{"question":"Will 3RH2911-2NL22 fit a panel designed for 3RH2122-2BG40?","answer":"No — the 3RH2122-2BG40 is a standalone auxiliary contactor (45 mm wide, screw/snap-on DIN rail mount) with its own coil and different contact ratings, while the 3RH2911-2NL22 is a contactor-mounted add-on block (36 mm wide, front snap-on) with no coil. They are not footprint-interchangeable."},{"question":"How do I get current pricing and availability for 3RH2911-2NL22?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-2NL22","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/3RH2911-2NL22 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}}