{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2140-1JB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2140-1JB40","canonicalUrl":"https://aoctrl.com/siemens/3RH2140-1JB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2140-1JB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS coupling relay, 3RH2140-1JB40, size S00, 4 NO instantaneous contacts, 24 VDC coil, 10 A rated, screw and snap-on 35 mm DIN rail mount.","salesMarkdown":"The Siemens 3RH2140-1JB40 is a SIRIUS coupling relay — size S00 — designed for switching auxiliary circuits in control panels. It carries 4 normally-open instantaneous contacts rated 10 A at 24 V, with a 24 VDC coil drawing 2.8 W closing power. The built-in diode surge suppressor handles the inductive kick from the coil, so you don't need an external flyback diode across the PLC output. The S00 footprint — 45 mm wide, 57.5 mm tall, 73 mm deep — fits alongside contactors in a crowded panel. Clearance distances: 10 mm upward/downward/forward, 6 mm at the sides. 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, 2 A at 500 V, 0.26 A at 600 V, and 1 A at 690 V. That voltage-dependent derating is typical for DC switching — the arc extinguishes differently at higher voltages, so the contact rating drops. For a 24 VDC PLC output driving a valve or contactor coil, the 10 A rating gives generous headroom. Mechanical endurance is 30 million operating cycles typical. Electrical switching frequency at AC is 10,000 operations per hour; at DC the arcing time runs 10–15 ms with a switching interval of 38–65 ms. Wire termination: spring-cage terminals accept 2x (0.5–1.5 mm²), 2x (0.75–2.5 mm²), or 2x 4 mm² solid or stranded. The S00 size shares the same DIN-rail footprint as Siemens contactors — you can gang them side-by-side without extra spacing beyond the 6 mm side clearance.","metaTitle":"Siemens 3RH2140-1JB40 SIRIUS Coupling Relay, 4 NO, 24 VDC, 1","metaDescription":"Siemens SIRIUS 3RH2140-1JB40 coupling relay, 4 NO contacts, 24 VDC coil, 10 A rated. Screw and snap-on 35 mm DIN rail. Current production. Sourced to order, RFQ for volume.","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":"57.5 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 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 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 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","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","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 12","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)","with low demand rate according to SN 31920":"40 %","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":"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","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":"https://cdn.aoctrl.com/dae69b22d91906d7a6b633503b3b0d40.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=48962&mlfb=3RH2140-1JB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2140-1JB40/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of the 3RH2140-1JB40?","answer":"The depth is 73 mm, measured from the DIN-rail mounting surface to the front of the housing. Width is 45 mm, height is 57.5 mm."},{"question":"What compliance documentation does Siemens provide for this relay?","answer":"The RoHS substance prohibition date is October 1, 2009, indicating compliance with the EU RoHS directive. The part is designed to IEC/EN standards for industrial control equipment. For UL/CSA or other regional certifications, request the manufacturer's declaration separately."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2140-1JB40","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/3RH2140-1JB40 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}}