{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1131-1HB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1131-1HB40","canonicalUrl":"https://aoctrl.com/siemens/3RH1131-1HB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1131-1HB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS coupling relay 3RH1131-1HB40, 24 VDC coil, 10 A rated current, 3 NO instantaneous contacts, S00 size, IP20 front, screw and snap-on mounting.","salesMarkdown":"The Siemens 3RH1131-1HB40 is a SIRIUS coupling relay — a 24 VDC coil, 10 A rated device that switches auxiliary circuits in a control panel. It carries three normally-open instantaneous contacts and zero delayed or lagging switching, so it's a straight on/off signal repeater, not a timing relay. The S00 contactor size keeps the footprint compact at 45 mm wide, 57.5 mm tall, and 72 mm deep. The 10 A at 24 V rating is the headline number — that's the continuous current the contacts can carry at the coil voltage. But the relay also handles 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V, so it's not limited to low-voltage auxiliary loops; it can switch control transformer secondaries or small motor contactor coils at line voltage. The 6 kV surge voltage rating (IEC 60947-1) means the insulation withstands transients common in industrial panels without flashover. If you're switching low-energy digital inputs, this relay won't give you intermittent opens from oxidation. Terminals accept solid wire: 2x 0.5 to 1.5 mm², 2x 0.75 to 2.5 mm², or 2x 4 mm². That covers most control wiring from signal loops to small power feeds. The IP20 front protection means the terminals are finger-safe once installed in an enclosure — standard for panel-mount gear. ## Coil power and thermal limits The DC coil draws 2.3 W closing and 2.3 W holding — same figure, so no power drop after pickup. That's a continuous 2.3 W load on the 24 VDC supply. Shock resistance is 10g for 5 ms and 5g for 10 ms, which covers most industrial vibration environments. RoHS compliant per the substance prohibition date of July 1, 2006. No auxiliary switch extension is available on this base variant — the 3 NO contacts are fixed.","metaTitle":"Siemens 3RH1131-1HB40 SIRIUS Coupling Relay, 24 VDC, 10 A, S","metaDescription":"Siemens 3RH1131-1HB40 SIRIUS coupling relay, 24 VDC coil, 10 A rated, 3 NO contacts, S00 size, IP20. Screw/snap-on mounting. Active production. Quoted to order.","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":"0.7","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)":"01.07.2006 00:00:00","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","reference code acc. to IEC 81346-2":"K","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","with low demand rate acc. to SN 31920":"40 %","with high demand rate acc. to SN 31920":"75 %","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","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","B10 value with high demand rate acc. to SN 31920":"1 000 000; With 0.3 x Ie","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=421559&mlfb=3RH1131-1HB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1131-1HB40/alternatives.json"},"ai":{"faq":[{"question":"What is 3RH1131-1HB40's listed depth?","answer":"The depth is 72 mm, with a width of 45 mm and height of 57.5 mm — S00 contactor size footprint."},{"question":"What wire sizes does the 3RH1131-1HB40 accept?","answer":"Solid wire: 2x 0.5 to 1.5 mm², 2x 0.75 to 2.5 mm², or 2x 4 mm² per terminal."},{"question":"Will 3RH1131-1HB40 drop into a panel specified around 3RH2122-1WB40 without rewiring?","answer":"Both are SIRIUS S00 contactor-size relays with similar DIN-rail mounting and terminal layouts, but the 3RH2122-1WB40 has a different contact configuration and coil voltage. Verify the contact arrangement and coil rating against your schematic before swapping — the footprint is compatible, but the function may differ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1131-1HB40","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/3RH1131-1HB40 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}}