{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-1NL22-0MC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-1NL22-0MC0","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-1NL22-0MC0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1NL22-0MC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3RH2911-1NL22-0MC0 auxiliary switch block, front-mount, 2 NO + 2 NC, one NO solid-state compatible, screw terminals, snap-on for S00/S0/S2/S3 contactors.","salesMarkdown":"## Front-mounted auxiliary switch for SIRIUS contactors The 3RH2911-1NL22-0MC0 is a front-mounted auxiliary switch block for Siemens SIRIUS contactors in frame sizes S00, S0, S2, and S3. It provides two NO and two NC instantaneous contacts, with one NO contact designated solid-state compatible — meaning it can switch low-level signals (5 V, 1 mA) reliably without the wiping action a standard contact needs, rated for one incorrect operation per 100 million cycles at that level. ## Coil draw and termination details The coil draws 0.3 A at 24 V, 48 V, and 60 V — the same current across all three voltages, so the control transformer sizing stays consistent regardless of which tap you land on. The IP20 front protection means it's touch-safe once installed in a closed panel. ## Mechanical life and environmental limits Mechanical service life is 5 million operating cycles typical — that's a lot of starts on a conveyor or pump before the switch block needs swapping. ## Wiring note: solid-state compatible NO The solid-state compatible NO contact (terminals 13/14) is the one to use for driving a PLC input or a solid-state relay directly — it's rated for low-energy switching without the contact resistance variability of a standard auxiliary. The other three contacts (21/22 NC, 31/32 NC, 43/44 NO) are standard instantaneous contacts. The switch block is not a mirror contact per IEC 60947-4-1, so it should not be used as the sole feedback for a safety function that requires a positively driven NC contact. For that, you'd need a separate mirror-contact auxiliary.","metaTitle":"Siemens 3RH2911-1NL22-0MC0 auxiliary switch, 2 NO + 2 NC","metaDescription":"Siemens 3RH2911-1NL22-0MC0 auxiliary switch block, 2 NO + 2 NC, one NO solid-state compatible. Screw terminals, snap-on mount for S00/S0/S2/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":"3RH2911-1NL22-0MC0","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, 2 NO + 2 NC, 13/14, 21/22, 31/32, 43/44, current path: 1 NO (solid-state compatible), 1 NC, 1 NC, 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":"2","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/c24d3815524440e337c9fc2d3bed5598.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1458570&mlfb=3RH2911-1NL22-0MC0"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RH2911-1NL22-0MC0?","answer":"This part is sourced through authorized distribution and quoted to order against your RFQ. Contact us with your BOM quantity for current pricing and lead time confirmation."},{"question":"What contactor frame sizes does 3RH2911-1NL22-0MC0 fit?","answer":"It mounts on Siemens SIRIUS contactors in frame sizes S00, S0, S2, and S3 via snap-on fastening. The depth is 43.7 mm, width 36 mm, height 37.5 mm — it adds about 36 mm of width to the contactor assembly."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-1NL22-0MC0","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/3RH2911-1NL22-0MC0 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}}