{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-1NL40-0MC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-1NL40-0MC0","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-1NL40-0MC0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1NL40-0MC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2911-1NL40-0MC0 auxiliary switch block, front-mount, 4 NO instantaneous contacts, solid-state compatible, screw-type terminals, IP20 front protection, snap-on mounting for contactor sizes S00, S0, S2, S3.","salesMarkdown":"## What this auxiliary switch block does The 3RH2911-1NL40-0MC0 is a front-mounted auxiliary switch block for Siemens SIRIUS contactors in frame sizes S00, S0, S2, and S3. It provides four normally-open (NO) instantaneous contacts — one of which is rated as solid-state compatible for switching low-level signals without contact oxidation issues. The solid-state compatible contact path (terminals 13/14) is designed for reliable switching down to 5 V, 1 mA, with a contact reliability of one incorrect switching operation per 100 million operations — essential for PLC inputs or electronic control circuits where standard contacts can fail from oxide film build-up. ## Panel fit and wiring details Snap-on mounting to the contactor front — no tools required for attachment. The block measures 36 mm wide by 43.7 mm deep by 37.5 mm high, fitting within the contactor envelope without adding panel depth beyond the contactor body. AWG equivalent is 2x (20…16) or 2x (18…14). The dual-wire termination allows daisy-chaining common signals without extra terminal blocks. Front protection class IP20 means the terminals are touch-safe from the front but the block is not sealed against dust ingress — suitable for enclosed panels only, not open or washdown environments. ## Environmental limits and service life The wide storage envelope covers cold warehouse or hot container shipping without damage. Mechanical service life is 5 million operating cycles typical — driven by the contactor's own wear, not the switch block. The block carries no mirror contact per IEC 60947-4-1 — it is not certified for safety-related feedback in welded-contact detection circuits. For safety applications requiring a mirror contact, use the 3RH29 series variant with that designation.","metaTitle":"Siemens 3RH2911-1NL40-0MC0 auxiliary switch, 4 NO","metaDescription":"Siemens 3RH2911-1NL40-0MC0 auxiliary switch block, 4 NO contacts, solid-state compatible, screw terminals, IP20 front, snap-on for S00-S3 contactors.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"43.7 mm","Width":"36 mm","title":"3RH2911-1NL40-0MC0","Height":"37.5 mm","at 24 V":"0.3 A","at 48 V":"0.3 A","at 60 V":"0.3 A","description":"auxiliary switch, solid-state compatible, on the front, 4 NO, 13/14, 23/24, 33/34, 43/44, current path: 1 NO (solid-state compatible), 1 NO, 1 NO, 1 NO, screw terminal, for 3RT102..-.X...-0LA(0.2) with adapter 3RT2926-4NA00 and for 3RT103..-.X...-0LA(0.2) with adapter 3RT2936-4NA00","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 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Suitability For Use":"power contactor","Instantaneous Contact":"4","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)","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 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","Mechanical Service Life (Operating Cycles) Typical":"5 000 000","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","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/277729dc2241bbfdf3ba29e696afbb14.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1458571&mlfb=3RH2911-1NL40-0MC0"},"ai":{"faq":[{"question":"What compliance documentation does this part carry?","answer":"The evidence does not list specific compliance certifications (RoHS, REACH, UL, IEC) for this order code. The part is designed for use with Siemens SIRIUS contactors, which typically carry CE, UL, and CSA marks; confirm documentation with the supplier at RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-1NL40-0MC0","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/3RH2911-1NL40-0MC0 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}}