{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1140-1AR10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1140-1AR10","canonicalUrl":"https://aoctrl.com/siemens/3RH1140-1AR10","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1140-1AR10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, 3RH1140-1AR10, size S00, 4 NO instantaneous contacts, 10 A AC-12 rated, 45 mm wide, screw and snap-on mounting.","salesMarkdown":"The Siemens 3RH1140-1AR10 is a SIRIUS auxiliary contactor in size S00, carrying four normally-open instantaneous contacts rated for 10 A in AC-12 duty. That AC-12 rating — resistive loads at unity power factor — is the figure that governs its use in control circuits feeding PLC outputs, relay coils, and indicator lamps. The 4 NO configuration means it adds four isolated signal paths without introducing any delayed or make-before-break switching, so it slots into standard interlocking and feedback circuits where timing must stay deterministic. At 45 mm wide, 57.5 mm tall, and 72 mm deep, this contactor occupies a single modular DIN-rail pitch — standard for a size S00 block. Beyond the headline 10 A AC-12 rating, the contacts carry defined currents at other common control voltages: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V. Terminals accept solid conductors in three size ranges: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and 2x 4 mm². For AWG, the equivalent is 2x (20 to 16), 2x (18 to 14), and 1x 12. The degree of pollution is rated 3, meaning the contactor is designed for environments with conductive or dry non-conductive pollution — typical of most industrial control panels not in clean-room conditions.","metaTitle":"Siemens 3RH1140-1AR10 SIRIUS Auxiliary Contactor, 4 NO, 10 A","metaDescription":"Siemens 3RH1140-1AR10 SIRIUS auxiliary contactor, 4 NO contacts, 10 A AC-12 rated, size S00, 45 mm wide. IP20 front, screw/snap-on mount. Current 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","at 60 Hz":"0.85 ... 1.1","1 Rated Value":"60 Hz","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","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":"Auxiliary contactor","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 60 Hz rated value":"440 V","at 690 V rated value":"1 A","Instantaneous Contact":"4","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":"Yes","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","apparent holding power of magnet coil at AC":"4.6 VA","apparent pick-up power of magnet coil at AC":"27 VA","with high demand rate according to SN 31920":"75 %","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"4","Type Of Voltage Of The Control Supply Voltage":"AC","Inductive Power Factor With Closing Power Of The Coil":"0.8","Identification Number And Letter For Switching Elements":"40 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Required Spacing With Side-By-Side Mounting At The Side":"0 mm","Inductive Power Factor With The Holding Power Of The Coil":"0.27","Of The Contactor With Added Auxiliary Switch Block 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","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000","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=491898&mlfb=3RH1140-1AR10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1140-1AR10/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to 3RH1140-1AR10?","answer":"The 3RH2140-1BP40 is a functional peer in the same SIRIUS family. The key difference is that 3RH2140-1BP40 carries 4 NO + 1 NC contacts versus the 4 NO configuration of the 3RH1140-1AR10. If your circuit requires a normally-closed auxiliary, the 3RH2140-1BP40 is the direct swap; if you only need NO paths, the 3RH1140-1AR10 is the cleaner fit. Both share the same size S00 footprint and mounting pattern, so no rewiring of the DIN-rail position is needed."},{"question":"Where can I buy 3RH1140-1AR10?","answer":"This part is 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 delivery commitment."},{"question":"What compliance documentation is available for 3RH1140-1AR10?","answer":"The part carries RoHS compliance with a substance prohibition date of July 1, 2006. Its reference code per IEC 81346-2 is K (contactor). The surge voltage resistance of 6 kV and pollution degree 3 indicate alignment with IEC 60947-series coordination requirements."},{"question":"What is the depth of 3RH1140-1AR10?","answer":"The depth is 72 mm. Combined with a width of 45 mm and height of 57.5 mm, it occupies a single modular DIN-rail pitch in size S00."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1140-1AR10","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/3RH1140-1AR10 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}}