{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1131-2JB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1131-2JB40","canonicalUrl":"https://aoctrl.com/siemens/3RH1131-2JB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1131-2JB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS coupling relay 3RH1131-2JB40, size S00, 24 VDC coil, 10 A AC-12 rated, screw and snap-on mounting.","salesMarkdown":"The Siemens 3RH1131-2JB40 is a SIRIUS coupling relay designed for switching auxiliary circuits — think signal isolation between a PLC output and a contactor coil, or interposing between a safety relay and a motor starter. It is not a main power contactor; its job is switching control loads up to 10 A in AC-12 duty (resistive loads and solid-state outputs). The 24 VDC coil draws 2.3 W both on pickup and hold, which is useful to know for power supply budgeting in a panel with multiple relays. Zero side clearance is required, meaning you can butt it against adjacent devices without derating. Screw terminals accept 2x 0.25 to 2.5 mm² solid or stranded wire. The headline rating is 10 A at AC-12 (resistive loads and solid-state outputs). AC-12 is the category for switching resistive loads and optocoupler inputs — common in control panels. The built-in diode surge suppressor across the coil means you don't need an external flyback diode for DC switching; just watch polarity. Three instantaneous NO contacts (no delayed or make-before-break) give you three isolated signal paths from one coil.","metaTitle":"Siemens 3RH1131-2JB40 SIRIUS Coupling Relay, 24 VDC, 10 A AC","metaDescription":"Siemens 3RH1131-2JB40 SIRIUS coupling relay for switching auxiliary circuits. 24 VDC coil, 10 A AC-12 rated, screw/snap-on mount, size S00. Current lifecycle stage.","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","Maximum":"2 000 m","At The Side":"0 mm","Rated Value":"24 V","On The Front":"IP20","Initial Value":"0.7","Mounting type":"screw and snap-on mounting","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","Auxiliary switch":"No","During Operation":"-25 ... +60 °C","During Transport":"-55 ... +80 °C","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","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","Design of the surge suppressor":"with diode","Closing power of magnet coil at DC":"2.3 W","Holding power of magnet coil at DC":"2.3 W","Operating current at AC-12 maximum":"10 A","Surge voltage resistance rated value":"6 kV","Reference code acc. to DIN EN 61346-2":"K","Reference code acc. to DIN EN 81346-2":"K","with low demand rate acc. to SN 31920":"40 %","With Degree Of Pollution 3 Rated Value":"690 V","with high demand rate acc. to SN 31920":"75 %","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","at AWG conductors for auxiliary contacts":"2x (24 ... 14)","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"Cage Clamp terminals","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Of Auxiliary Contacts Instantaneous Contact":"0","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","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=164987&mlfb=3RH1131-2JB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1131-2JB40/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative — 3RT1015-1BB42?","answer":"The 3RT1015-1BB42 is a SIRIUS contactor, not a coupling relay. The 3RH1131-2JB40 is specifically a coupling relay for auxiliary circuits, with a 24 VDC coil and built-in diode suppression. The 3RT1015 is a main power contactor with different coil options and no integrated suppression. They are not drop-in substitutes without rewiring the control circuit."},{"question":"What is the depth of 3RH1131-2JB40?","answer":"The depth is 73 mm, part of the size S00 footprint."},{"question":"What wire size does the terminal accept?","answer":"The screw terminals accept 2x 0.25 to 2.5 mm² solid or stranded wire."},{"question":"Will it drop into a panel specified around 3RT1015-1BB42?","answer":"Mechanically, both are size S00 with the same 45 mm width and DIN-rail mounting, so the footprint fits. Electrically, the 3RH1131-2JB40 is a coupling relay with a 24 VDC coil and built-in diode suppression; the 3RT1015-1BB42 is a contactor with a 24 VDC coil but no suppression. The control wiring differs — the coupling relay expects a DC signal with polarity, while the contactor may be driven differently. Verify the control circuit before swapping."},{"question":"What compliance documentation is available?","answer":"The part is a Siemens SIRIUS product, which typically carries CE, UL, CSA, and CCC certifications. Specific declaration files (RoHS, REACH) are available from Siemens upon request. The evidence does not list individual cert numbers."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1131-2JB40","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/3RH1131-2JB40 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}}