{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1911-1GA31","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1911-1GA31","canonicalUrl":"https://aoctrl.com/siemens/3RH1911-1GA31","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1GA31","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, 3RH1911-1GA31, 3 NO + 1 NC, screw terminals, snap-on mounting, 10 A at 24 V.","salesMarkdown":"The Siemens SIRIUS 3RH1911-1GA31 is a 4-pole auxiliary switch block designed for use with SIRIUS contactor relays and power contactors. It provides 3 normally open (NO) and 1 normally closed (NC) instantaneous contacts, wired via screw-type terminals. The AC-15 rating at 690 V is 1 A, which covers the inductive switching duty of contactor coils and solenoid valves in higher-voltage circuits. The 10 A maximum at 24 V (and 6 A at 24 V for the auxiliary contact rating) means this block can switch multiple small loads in parallel without exceeding the contact current limit. Mechanical life is 10 million switching cycles typical, so in a machine cycling once every 10 seconds, the block outlasts about 3 years of continuous operation before mechanical wear becomes a concern. ## Integration in the panel Dimensions: 36.5 mm wide, 37.5 mm high, 41.5 mm deep — compact enough to fit alongside a contactor in a crowded gland plate. Wire termination accepts 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) with core-end processing, or 2x (20–16) and 2x (18–14) AWG. Screw terminals are standard; no special tooling needed.","metaTitle":"Siemens 3RH1911-1GA31 SIRIUS Auxiliary Switch Block, 3NO+1NC","metaDescription":"Siemens SIRIUS 3RH1911-1GA31 auxiliary switch block. 3 NO + 1 NC contacts, rated 10 A at 24 V. Snap-on DIN rail mount. Phased out; successor 3RH2911-1GA31. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Note":"with 3RH1","Depth":"41.5 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), 2x (0.75 ... 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 ... 16), 2x (18 ... 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":"screw-type 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=300054&mlfb=3RH1911-1GA31","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1GA31/alternatives.json"},"ai":{"faq":[{"question":"What replaces 3RH1911-1GA31?","answer":"The preferred successor type is 3RH2911-1GA31. It maintains the 3 NO + 1 NC contact arrangement and snap-on DIN rail mount, so a panel designed around the 3RH1911 can accept the 3RH2911 without rewiring."},{"question":"What are the key ratings of 3RH1911-1GA31?","answer":"Rated 10 A at 24 V maximum, with AC-15 rating of 1 A at 690 V. Mechanical life is 10 million switching cycles typical. Contact reliability is 1 fault per 100 million operations at 17 V, 1 mA. IP20 front protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1911-1GA31","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/3RH1911-1GA31 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}}