{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1911-2GA31","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1911-2GA31","canonicalUrl":"https://aoctrl.com/siemens/3RH1911-2GA31","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1911-2GA31","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, 3RH1911-2GA31, 3 NO + 1 NC per EN 50011, spring-loaded terminals, snap-on mounting, 10 A rated, IP20 front.","salesMarkdown":"The Siemens SIRIUS 3RH1911-2GA31 is a 4-pole auxiliary switch block with a 3 NO + 1 NC contact arrangement per EN 50011, designed for snap-on mounting onto contactor relays and power contactors in the SIRIUS family. Rated at 10 A maximum, the contact ratings vary significantly by voltage and duty: at 24 V it carries 10 A (or 6 A depending on the duty class), at 230 V it carries 6 A, and at 400 V it drops to 3 A — the AC-15 rating at 690 V is 1 A, which governs its use in solenoid and contactor coil switching circuits. Spring-loaded terminals accept 2x (0.5 to 1.5 mm²) with ferrules or 2x (0.5 to 2.5 mm²) solid, saving panel wiring time compared to screw terminals. Snap-on mounting to a 35 mm DIN rail or directly onto a SIRIUS contactor relay — the 46 mm depth, 36.5 mm width, and 37.5 mm height mean it adds minimal footprint to the contactor stack. ## Contact reliability and mechanical endurance Mechanical service life is 10 million switching cycles typical.","metaTitle":"Siemens 3RH1911-2GA31 Auxiliary Switch Block, 3 NO + 1 NC, S","metaDescription":"Siemens SIRIUS 3RH1911-2GA31 auxiliary switch block, 3 NO + 1 NC per EN 50011, spring-loaded terminals, snap-on DIN rail, 10 A rated, IP20. Phased-out; successor 3RH2911-2GA31. Sou","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Note":"with 3RH1","Depth":"46 mm","Width":"36.5 mm","Height":"37.5 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","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","Product Brand Name":"SIRIUS","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","Instantaneous Contact":"3","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":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=453955&mlfb=3RH1911-2GA31","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1911-2GA31/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source — 3RH2422-1AB00?","answer":"The 3RH2422-1AB00 is a different class: it is a 2 NO + 2 NC auxiliary contactor (not a switch block), uses screw terminals, and has a larger footprint (73 mm depth, 90 mm width). It will not drop into the same DIN rail space or match the 3 NO + 1 NC wiring pattern without rewiring. The intended replacement is the 3RH2911-2GA31, not the 3RH2422."},{"question":"Will 3RH1911-2GA31 drop into a panel specified around 3RH2422-1AB00?","answer":"No. The 3RH2422-1AB00 is a full auxiliary contactor with screw terminals, 73 mm deep and 90 mm wide, while the 3RH1911-2GA31 is a 46 mm deep snap-on switch block with spring terminals. The mounting method, wiring pattern, and physical space are incompatible."},{"question":"What compliance documentation does this brand provide for 3RH1911-2GA31?","answer":"The evidence does not list specific compliance certificates (RoHS, REACH, UL, IEC). The insulation voltage rating of 690 V with pollution degree 3 and surge voltage resistance of 6 kV indicate design to IEC 60947 standards. For formal documentation, request the manufacturer's declaration of conformity with your RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1911-2GA31","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/3RH1911-2GA31 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}}