{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2140-2JB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2140-2JB40","canonicalUrl":"https://aoctrl.com/siemens/3RH2140-2JB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2140-2JB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS coupling relay, 3RH2140-2JB40, Size S00, 4 NO instantaneous contacts, 24 VDC coil with integrated diode suppression, screw and snap-on mounting onto 35 mm rail, 45 mm wide, 73 mm deep.","salesMarkdown":"The 3RH2140-2JB40 mounts via screw and snap-on onto a 35 mm standard mounting rail, fitting into the S00 contactor footprint — 45 mm wide, 73 mm deep, 70 mm tall. The 4 NO contacts are rated for switching at multiple voltage levels: 10 A at 24 V and 230 V, 4.7 A at 60 V, 3 A at 110 V and 400 V, 1.2 A at 220 V, 0.5 A at 440 V, 0.26 A at 600 V, and 1 A at 690 V (–). These are the thermal current ratings (Ith) for the contact set — so at 24 VDC you can switch a 10 A resistive load, but at 600 V the same contacts are limited to 0.26 A. For DC switching, the arcing time runs 10–15 ms and the operating time at DC is 38–65 ms, which matters when coordinating with downstream devices in a safety circuit or sequence. The coil draws 2.8 W at DC closure and includes a built-in diode suppressor — that means you don't need an external flyback diode across the coil, saving a component and a wiring step. The closing power of 2.8 W is modest, so the relay can be driven by a standard PLC digital output or a small control transformer. ## Deployment context: panel integration and environment","metaTitle":"Siemens 3RH2140-2JB40 SIRIUS Coupling Relay, 4 NO Contacts,","metaDescription":"Siemens SIRIUS 3RH2140-2JB40 coupling relay, 4 NO instantaneous contacts, 24 VDC coil with diode suppression. Size S00, 45 mm wide, 73 mm deep. Active production, available to orde","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Width":"45 mm","at AC":"10 000 1/h","at DC":"38 ... 65 ms","Height":"70 mm","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","Rated Value":"24 V","Initial Value":"0.7","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail","Full-Scale Value":"1.25","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","Solid Or Stranded":"2x (0,5 ... 4 mm²)","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"Coupling relay for switching auxiliary circuits","at 24 V rated value":"10 A","at 60 V rated value":"4.7 A","Of Contactor Typical":"30 000 000","at 110 V rated value":"3 A","at 220 V rated value":"1.2 A","at 230 V rated value":"10 A","at 400 V rated value":"3 A","at 440 V rated value":"0.5 A","at 500 V rated value":"2 A","at 600 V rated value":"0.26 A","at 690 V rated value":"1 A","Instantaneous Contact":"4","Relative Humidity Minimum":"10 %","Substance Prohibitance (Date)":"10/01/2009","Design Of The Surge Suppressor":"diode","Product Extension Auxiliary Switch":"No","closing power of magnet coil at DC":"2.8 W","holding power of magnet coil at DC":"2.8 W","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 12)","operating frequency at DC-12 maximum":"1 000 1/h","operating frequency at DC-13 maximum":"1 000 1/h","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 ... 2.5 mm²)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","with low demand rate according to SN 31920":"40 %","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","with high demand rate according to SN 31920":"73 %","number of NO contacts for auxiliary contacts":"4","Type Of Voltage Of The Control Supply Voltage":"DC","contact rating of auxiliary contacts according to UL":"A600 / Q600","Identification Number And Letter For Switching Elements":"40 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Type Of Electrical Connection For Auxiliary And Control Circuit":"spring-loaded 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","design of the miniature circuit breaker for short-circuit protection of the auxiliary circuit up to 230 V":"C characteristic: 6 A; 0.4 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$25.40","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/74cd57aef03f966c1f6f9f90593f3007.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=427304&mlfb=3RH2140-2JB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2140-2JB40/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2140-2JB40","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/3RH2140-2JB40 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}}