{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-2XA40-0MA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-2XA40-0MA0","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-2XA40-0MA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2XA40-0MA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, 3RH2911-2XA40-0MA0, 4 N/O instantaneous contacts, snap-on mounting for contactor sizes S00, S0, S2, S3, rated 6 A at 24 V / 10 A at 24 V rated value.","salesMarkdown":"The Siemens SIRIUS 3RH2911-2XA40-0MA0 is an auxiliary switch block with four instantaneous normally-open contacts, designed to snap onto the front of SIRIUS contactors in sizes S00, S0, S2, and S3. It carries a 6 A rating at 24 V and a 10 A rated value at 24 V, with the contact reliability specified at one faulty switching per 100 million operations at 17 V, 1 mA — a figure that matters for PLC-level signal circuits where a single missed pick-up can fault a safety chain. The switching capacity drops with voltage: 6 A at 24 V and 230 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V and 250 V, and 3 A at 400 V. The rated values (thermal current) are higher: 10 A at 24 V, 4.7 A at 60 V, 3 A at 110 V, 1.2 A at 220 V, 0.5 A at 440 V, and 0.26 A at 600 V. The 6 kV surge voltage resistance means the contacts can handle transient spikes common in motor starter panels without welding shut. Snap-on mounting to the front of the contactor — no tools, no DIN-rail space consumed beyond the contactor itself. The block measures 36 mm wide, 47.7 mm deep, and 41.5 mm high, fitting within the contactor envelope. Wiring accepts 2x (0.5 to 2.5 mm²) solid or stranded, or 2x (20 to 14 AWG). IP20 on the front side; fine for enclosed panels but not for washdown environments.","metaTitle":"Siemens 3RH2911-2XA40-0MA0 SIRIUS Auxiliary Switch, 4 N/O Co","metaDescription":"Siemens SIRIUS 3RH2911-2XA40-0MA0 auxiliary switch block with 4 instantaneous N/O contacts. Rated 6 A at 24 V, 10 A at 24 V rated value. Snap-on mounting for S00–S3 contactors. IP2","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"47.7 mm","Width":"36 mm","title":"3RH2911-2XA40-0MA0","Height":"41.5 mm","at 24 V":"6 A","at 48 V":"2 A","at 60 V":"2 A","at 110 V":"1 A","at 125 V":"0.9 A","at 220 V":"0.3 A","at 230 V":"6 A","at 250 V":"0.3 A","at 400 V":"3 A","description":"auxiliary switch, on the front, 4 NO, 53/54, 63/64, 73/74, 83/84, current path: 1 NO, 1 NO, 1 NO, 1 NO, spring-loaded terminal, for contactors 3RT2 and contactor relays 3RH2","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","Product Category":"Auxiliary switch","Lagging Switching":"0","Size Of Contactor":"S00, S0, S2, S3","Solid Or Stranded":"2x (0.5 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"auxiliary switch","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","Design Of The Product":"for snapping onto the front, with SUVA approval","Instantaneous Contact":"4","Substance Prohibitance (Date)":"10/01/2009","protection class IP on the front":"IP20","Surge Voltage Resistance Rated Value":"6 kV","for 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":"1 faulty switching per 100 million (17 V, 1 mA)","mirror contact according to IEC 60947-4-1":"Yes; with 3RT2","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","operational current at AC-15 at 690 V rated value":"1 A","Mechanical Service Life (Operating Cycles) Typical":"10 000 000","operational current of auxiliary contacts at AC-12 maximum":"10 A","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":"$7.39","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ef8ddff6eafab1d88ee7be2da26de46e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=297263&mlfb=3RH2911-2XA40-0MA0"},"ai":{"faq":[{"question":"What contactors does this auxiliary switch fit?","answer":"It snaps onto the front of SIRIUS contactors in sizes S00, S0, S2, and S3 — that covers the 3RT2 series from about 7 A up to 150 A frame sizes."},{"question":"What is the contact reliability of 3RH2911-2XA40-0MA0?","answer":"Specified at one faulty switching per 100 million operations at 17 V, 1 mA — a dry-circuit rating that matters for PLC input signals where oxide films on standard contacts can cause intermittent opens."},{"question":"Where can I buy 3RH2911-2XA40-0MA0?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-2XA40-0MA0","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/3RH2911-2XA40-0MA0 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}}