{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-2NL40-0MC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-2NL40-0MC0","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-2NL40-0MC0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2NL40-0MC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2911-2NL40-0MC0 auxiliary switch block, 4 NO instantaneous contacts (1 solid-state compatible), spring-loaded terminals, snap-on mounting for contactor sizes S00, S0, S2, S3, IP20 front, 690 V insulation voltage.","salesMarkdown":"## Contact configuration and solid-state compatibility The 3RH2911-2NL40-0MC0: This auxiliary switch block provides 4 normally open (NO) instantaneous contacts, wired as 13/14, 23/24, 33/34, and 43/44. One of those four is specified as solid-state compatible, meaning its contact reliability is verified down to 5 V and 1 mA — one incorrect switching operation per 100 million cycles at that level. The remaining three are standard NO contacts for conventional PLC or relay loads. The solid-state compatible NO is the one to use for low-energy inputs like a 24 VDC PLC sink card or a safety relay feedback loop where contact wetting current is minimal. The other NO contacts handle higher-current pilot duty without issue. Snap-on mounting directly onto the front of SIRIUS contactors in frame sizes S00, S0, S2, and S3. No DIN rail — the block clips onto the contactor's front face. For 3RT102 and 3RT103 contactors with the -0LA(0.2) option, an adapter (3RT2926-4NA00 or 3RT2936-4NA00 respectively) is required. Dimensions are 36 mm wide, 47.7 mm deep, and 41.5 mm tall. The depth is measured from the contactor face forward; plan for this protrusion when laying out the enclosure depth, especially in shallow panels. ## Wiring and termination No screw torque to verify — push the stripped wire in and the spring holds it. The 6 kV rated surge voltage resistance and 690 V AC insulation voltage at pollution degree 3 mean this block is suitable for 400/480 VAC control circuits with adequate clearance. IP20 on the front face protects against finger contact but not washdown. Marked as current production. This is a standard SIRIUS accessory block, widely stocked and quoted to order against BOM quantities.","metaTitle":"Siemens 3RH2911-2NL40-0MC0 Auxiliary Switch, 4 NO","metaDescription":"Siemens 3RH2911-2NL40-0MC0 auxiliary switch block, 4 NO contacts (1 solid-state compatible), spring-loaded terminals, snap-on for S00-S3 contactors.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"47.7 mm","Width":"36 mm","title":"3RH2911-2NL40-0MC0","Height":"41.5 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, spring-loaded 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 ... 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 ... 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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/94909fe68c7e40e094d0e3eb5825bac9.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1458575&mlfb=3RH2911-2NL40-0MC0"},"ai":{"faq":[{"question":"What contactor sizes does the 3RH2911-2NL40-0MC0 fit?","answer":"It snaps onto SIRIUS contactors in frame sizes S00, S0, S2, and S3. For 3RT102 and 3RT103 contactors with the -0LA(0.2) option, use adapter 3RT2926-4NA00 (for 3RT102) or 3RT2936-4NA00 (for 3RT103)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-2NL40-0MC0","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/3RH2911-2NL40-0MC0 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}}