{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1131-2KV40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1131-2KV40","canonicalUrl":"https://aoctrl.com/siemens/3RH1131-2KV40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1131-2KV40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS coupling relay, size S00, 3RH1131-2KV40, 36 V DC coil, 3 NO contacts, 10 A at 24 V, screw and snap-on mounting, IP20 front.","salesMarkdown":"The Siemens 3RH1131-2KV40 is a SIRIUS coupling relay, size S00, designed for switching auxiliary circuits in control panels. The contact reliability spec — one incorrect switching operation per 100 million cycles at 17 V, 1 mA — confirms it is suited for low-level signal switching where oxidation on dry contacts is a concern. The built-in varistor surge suppressor protects the coil drive circuit from voltage spikes, which is relevant when the relay is driven by a solid-state output on a PLC or safety relay. Strip length is standard for this terminal family. ## Key ratings and their meaning Pollution degree 3 means it is designed for the conductive pollution environment typical of factory floors — no special conformal coating required for normal use. The thermal and shock ratings — 10g for 5 ms and 5g for 10 ms — cover the vibration found on machine-mounted panels or near heavy rotating equipment. The contacts are rated for switching at various voltages: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. These are the thermal current ratings for the auxiliary contacts — they define the maximum continuous current the contacts can carry, not the motor starting current.","metaTitle":"Siemens 3RH1131-2KV40 SIRIUS Coupling Relay, 36 V, 10 A at 2","metaDescription":"Siemens 3RH1131-2KV40 SIRIUS coupling relay, size S00, for switching auxiliary circuits. Rated 36 V coil, 10 A at 24 V, 3 NO contacts, IP20 front. Current lifecycle stage. Sourced","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45 mm","Height":"60 mm","Rated Value":"36 V","Initial Value":"0.7","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-55 ... +80 °C","Fastening Method":"screw and snap-on mounting","Full-Scale Value":"1.25","Shock Resistance":"10g / 5 ms and 5g / 10 ms","Delayed Switching":"0","Lagging Switching":"0","Mounting Position":"+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface","Size Of Contactor":"S00","Product Brand Name":"SIRIUS","Contact Reliability":"one incorrect switching operation of 100 million switching operations (17 V, 1 mA)","Degree Of Pollution":"3","Product Designation":"Coupling relay for switching auxiliary circuits","at 24 V rated value":"10 A","Of Contactor Typical":"30 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.27 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 500 V rated value":"2 A","at 690 V rated value":"1 A","Instantaneous Contact":"3","For Auxiliary Contacts":"0","Make-Before-Break Switching":"0","Substance Prohibitance (Date)":"07/01/2006","Design Of The Surge Suppressor":"with varistor","protection class IP on the front":"IP20","Product Extension Auxiliary Switch":"No","closing power of magnet coil at DC":"2.3 W","holding power of magnet coil at DC":"2.3 W","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (24 ... 14)","operational current at AC-12 maximum":"10 A","reference code according to IEC 81346-2":"K","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Touch Protection Against Electrical Shock":"finger-safe","with low demand rate according to SN 31920":"40 %","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Of Auxiliary Contacts Instantaneous Contact":"0","with high demand rate according to SN 31920":"75 %","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"3","Type Of Voltage Of The Control Supply Voltage":"DC","Identification Number And Letter For Switching Elements":"31 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Required Spacing With Side-By-Side Mounting At The Side":"0 mm","Type Of Electrical Connection For Auxiliary And Control Circuit":"Cage Clamp terminals","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Design Of The Fuse Link For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A"}},"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=203464&mlfb=3RH1131-2KV40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1131-2KV40/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for this coupling relay?","answer":"The coil is rated 36 V DC, drawing 2.3 W. The contacts are rated 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V. It has 3 normally open instantaneous contacts and a built-in varistor surge suppressor."},{"question":"What is the mounting and wiring specification?","answer":"It mounts on a DIN rail via screw and snap-on, 45 mm wide. The terminals accept 0.25 to 2.5 mm² wire. The front is IP20 rated."},{"question":"Does this part include an auxiliary switch extension?","answer":"No, the product extension for an auxiliary switch is listed as 'No'. The 3RH1131-2KV40 comes with its 3 built-in NO contacts only."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1131-2KV40","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/3RH1131-2KV40 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}}