{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1131-1MB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1131-1MB40","canonicalUrl":"https://aoctrl.com/siemens/3RH1131-1MB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1131-1MB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS coupling relay, 3RH1131-1MB40, for switching auxiliary circuits, 24 VDC coil, 10 A rated current, Size S00, screw and snap-on mounting, IP20 front.","salesMarkdown":"The Siemens 3RH1131-1MB40 is a SIRIUS coupling relay built for switching auxiliary circuits in a control panel. Coil pulls in at 24 VDC, drops out at the lower end of the 0.85 to 2.15 range — standard for 24 V logic. Snaps onto a DIN rail or screws down; size S00 footprint (45 mm wide × 57.5 mm tall × 72 mm deep) fits tightly into a crowded enclosure. Mounts on a vertical surface with screw or snap-on fastening. Wire terminations accept solid conductors: two of 0.5…1.5 mm², two of 0.75…2.5 mm², or one of 4 mm² per clamp. AWG equivalents are 20…16, 18…14, and 12 respectively. IP20 on the front — protected against finger contact, not washdown. Keep it inside the enclosure.","metaTitle":"Siemens 3RH1131-1MB40 SIRIUS Coupling Relay, 24 VDC, 10 A, 3","metaDescription":"Siemens 3RH1131-1MB40 SIRIUS coupling relay for auxiliary circuits. 24 VDC coil, 10 A rated current. Size S00, screw and snap-on DIN-rail mount. Current lifecycle stage; sourced to","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"72 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Width":"45 mm","Height":"57.5 mm","Rated Value":"24 V","Initial Value":"0.85","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +40 °C","During Transport":"-55 ... +80 °C","Fastening Method":"screw and snap-on mounting","Full-Scale Value":"2.15","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","protection class IP on the front":"IP20","Product Extension Auxiliary Switch":"No","closing power of magnet coil at DC":"1.4 W","holding power of magnet coil at DC":"1.4 W","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","operational current at AC-12 maximum":"10 A","reference code according to IEC 81346-2":"K","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 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 %","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":"screw-type 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=321393&mlfb=3RH1131-1MB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1131-1MB40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RH1131-1MB40 and get a price?","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 number."},{"question":"What is the depth of 3RH1131-1MB40?","answer":"72 mm deep, with a width of 45 mm and height of 57.5 mm — size S00 footprint."},{"question":"What conductor sizes does the 3RH1131-1MB40 accept?","answer":"Solid conductors: two of 0.5…1.5 mm², two of 0.75…2.5 mm², or one of 4 mm² per clamp. AWG equivalents: 2x 20…16, 2x 18…14, 1x 12."},{"question":"Will 3RH1131-1MB40 drop into a panel specified around 3RH2122-1WB40?","answer":"Not a direct bolt-in — the 3RH1131-1MB40 is a coupling relay with 3 NO instantaneous contacts, while the 3RH2122-1WB40 has a different contact configuration. Both share the S00 footprint and DIN-rail mounting, but check your wiring diagram for contact count and function before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1131-1MB40","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/3RH1131-1MB40 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}}