{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-2GA40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-2GA40","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-2GA40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2GA40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch, 3RH2911-2GA40, 4 NO contacts, 10 A maximum, spring-loaded terminals, snap-on mounting, IP20 front.","salesMarkdown":"The Siemens SIRIUS 3RH2911-2GA40 is a front-mounted auxiliary switch block delivering 4 normally-open (NO) contacts, labelled 53/54, 63/64, 73/74, and 83/84 per EN 50011. It's designed specifically for use with 3RH2140 and 3RH2440 contactor relays — physically coded so it only fits those frames. Rated at 10 A maximum, with a 10 A continuous rating at 24 V. The AC-15 switching capacity at 690 V is 1 A — that's the figure that governs solenoid and contactor coil loads in a control panel. Spring-loaded terminals accept 2x (0.5 to 1.5 mm²) with ferrules, or 2x (0.5 to 2.5 mm²) solid, which covers most panel wiring without needing bootlace ferrules. Snap-on mounting onto the contactor relay — no tools needed for the install, but verify the physical coding matches the relay frame before you push it on. ## Switching capacity across voltages The 3RH2911-2GA40's contact ratings vary significantly with voltage and load type. For DC switching: 6 A at 24 V, 6 A at 125 V, 6 A at 230 V, 6 A at 250 V, but drops to 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, and 3 A at 400 V. For AC-15 inductive loads at 690 V, it's rated 1 A. The 6 kV surge voltage resistance gives it decent margin for transient suppression on the coil side. The 3RH2911-2GA40 carries a current lifecycle stage per the manufacturer's classification. It's a standard catalog item in the SIRIUS auxiliary switch range, not flagged for phase-out. ## Mechanical endurance and contact reliability Rated for 10 million mechanical switching cycles typical. ## Panel integration Dimensions: 36 mm wide, 41.5 mm high, 47.7 mm deep. Snap-on mounting onto the contactor relay frame — no DIN rail required, it clips directly to the 3RH2140 or 3RH2440. The spring-loaded terminals are physically coded to prevent mis-mating.","metaTitle":"Siemens 3RH2911-2GA40 SIRIUS Auxiliary Switch, 4 NO, 10 A","metaDescription":"Siemens SIRIUS auxiliary switch 3RH2911-2GA40: 4 NO contacts, 10 A max, spring-loaded terminals, snap-on mounting. IP20 front. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Note":"with 3RH2","Depth":"47.7 mm","Width":"36 mm","Height":"41.5 mm","Maximum":"10 A","at 24 V":"6 A","at 60 V":"2 A","at 110 V":"1 A","at 125 V":"6 A","at 220 V":"0.3 A","at 230 V":"6 A","at 250 V":"6 A","at 400 V":"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","Product Brand Name":"SIRIUS","Suitability For Use":"Contactor relay","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","Instantaneous Contact":"4","With Core End Processing":"2x (0.5 ... 1.5 mm²)","Without Core End Processing":"2x (0.5 ... 2.5 mm²)","at AC-15 at 690 V rated value":"1 A","protection class IP on the front":"IP20","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 14)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Mechanical Service Life (Switching Cycles) Typical":"10 000 000","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"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.27","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=404275&mlfb=3RH2911-2GA40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2911-2GA40/alternatives.json"},"ai":{"faq":[{"question":"What is the 3RH2911-2GA40 used for?","answer":"It's a front-mounted auxiliary switch block that adds 4 normally-open contacts to 3RH2140 and 3RH2440 contactor relays. Used for status feedback, interlocking, or extending the control circuit in motor starter assemblies."},{"question":"Where can I buy the 3RH2911-2GA40?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What are the key ratings for the 3RH2911-2GA40?","answer":"Maximum 10 A, 6 kV surge voltage resistance, 690 V AC insulation voltage at pollution degree 3, 10 million mechanical cycles typical, and a contact reliability of 1 fault per 100 million operations at 17 V, 1 mA."},{"question":"Will the 3RH2911-2GA40 fit a 3RH2131-2AK60 panel without rewiring?","answer":"No — the 3RH2911-2GA40 is physically coded and only fits 3RH2140 and 3RH2440 contactor relay frames. It will not mount on a 3RH2131-2AK60 without mechanical modification."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-2GA40","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/3RH2911-2GA40 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}}