{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2140-2JC40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2140-2JC40","canonicalUrl":"https://aoctrl.com/siemens/3RH2140-2JC40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2140-2JC40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS coupling relay, 3RH2140-2JC40, 4 NO instantaneous contacts, 24 VDC coil, 10 A rated current, screw and snap-on mounting on 35 mm DIN rail, size S00.","salesMarkdown":"The Siemens 3RH2140-2JC40 is a SIRIUS coupling relay — a 4-pole auxiliary contactor for switching auxiliary circuits in control panels. It carries 4 normally-open instantaneous contacts rated at 10 A at 24 V and 10 A at 230 V, so it handles signal-level loads and small motor contactor coils without extra interposing relays. The coil is 24 VDC with a built-in diode surge suppressor, which means you don't need an external flyback diode on the PLC output driving it. The S00 contactor size keeps the footprint compact at 45 mm wide by 73 mm deep by 70 mm high. It fits alongside other SIRIUS S00 gear in a shared enclosure. The 4 NO contacts are rated for switching at multiple voltage levels: 10 A at 24 V, 4.7 A at 60 V, 3 A at 110 V, 1.2 A at 220 V, 10 A at 230 V, 3 A at 400 V, 0.5 A at 440 V, 2 A at 500 V, 0.26 A at 600 V, and 1 A at 690 V. That covers most control-voltage standards from 24 VDC up to 690 VAC — the rating drops as voltage rises, typical for contact life. DC switching has a timing range of 38 to 65 ms, with arcing time between 10 and 15 ms.","metaTitle":"Siemens 3RH2140-2JC40 SIRIUS Coupling Relay, 4 NO, 24 VDC, D","metaDescription":"Siemens 3RH2140-2JC40 SIRIUS coupling relay with 4 NO contacts, 24 VDC coil, 10 A rated current. Screw and snap-on mounting on 35 mm DIN rail. Current lifecycle. Available to order","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":"30 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 DIN 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":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=808504&mlfb=3RH2140-2JC40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2140-2JC40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RH2140-2JC40 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the closest functional second-source for 3RH2140-2JC40?","answer":"The 3RH2140-1BP40 is a peer variant — same SIRIUS S00 coupling relay with 4 NO contacts, but check the coil voltage and surge suppressor design to confirm drop-in fit without rewiring."},{"question":"What compliance documentation does Siemens provide for 3RH2140-2JC40?","answer":"The part carries a substance prohibition date of 10/01/2009, indicating RoHS compliance. Standard Siemens documentation includes a CE declaration and manufacturer's declaration for the SIRIUS series."},{"question":"Will 3RH2140-2JC40 drop into a panel specified around 3RH2140-1BP40 without rewiring?","answer":"Both share the same S00 contactor size, same 45 mm width, and same DIN-rail mounting footprint, so the mechanical swap is direct. Verify the coil voltage and surge suppressor type — the -2JC40 uses a built-in diode suppressor; the -1BP40 may differ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2140-2JC40","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/3RH2140-2JC40 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}}