{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH6140-1KB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH6140-1KB40","canonicalUrl":"https://aoctrl.com/siemens/3RH6140-1KB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH6140-1KB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS coupling relay, size S00, 24 V DC coil, 4 NO contacts, 6 A rated current, screw terminals, 45 mm width, DIN rail mount.","salesMarkdown":"The Siemens 3RH6140-1KB40 is a SIRIUS coupling relay, size S00, designed for switching auxiliary circuits in control panels. It carries four normally-open (NO) contacts — the \"40 E\" designation in the order code means 4 NO, zero NC. Rated operational current at AC-12 is 6 A, and at 24 V DC it's also 6 A. Screw-type terminals accept 2x (0.5 to 1.5 mm²) solid/stranded, 2x (0.75 to 2.5 mm²), or 2x 4 mm². AWG equivalents: 2x (20-16), 2x (18-14), 2x 12. Finely stranded wire with core-end processing: 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²). ## Electrical ratings and switching capacity Maximum installation altitude is 2,000 m above sea level. For DC-12 and DC-13 loads, the maximum operating frequency is 1,000 operations per hour. Rated operational currents at various voltages: 6 A at 24 V, 3 A at 110 V, 1.2 A at 220 V, 10 A at 230 V, 3 A at 400 V, 1 A at 690 V. The surge suppressor is a built-in diode.","metaTitle":"Siemens 3RH6140-1KB40 SIRIUS Coupling Relay, 24 V DC, 4 NO","metaDescription":"Siemens 3RH6140-1KB40 SIRIUS coupling relay, 24 V DC coil, 4 NO contacts, 6 A rated current, screw terminals, DIN rail mount. Current lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Width":"45 mm","at AC":"10 000 1/h","at DC":"10 000 1/h","title":"3RH6140-1KB40","Height":"57.5 mm","Rated Value":"24 V","description":"Coupling contactor relay, 4 NO w. integrated suppressor diode size S00, screw terminal","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","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","Product Designation":"Coupling relay for switching auxiliary circuits","at 24 V rated value":"6 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 690 V rated value":"1 A","Substance Prohibitance (Date)":"05/01/2012","Design Of The Surge Suppressor":"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 ... 16), 2x (18 ... 14), 2x 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":"6 A","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)","number of NO contacts for auxiliary contacts":"4","Type Of Voltage Of The Control Supply Voltage":"DC","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c44ac628b31de4474a4be5e7e9253f70.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=641399&mlfb=3RH6140-1KB40"},"ai":{"faq":[{"question":"Is 3RH6140-1KB40 normally open or normally closed?","answer":"The 3RH6140-1KB40 has four normally-open (NO) contacts. The switching element designation \"40 E\" means 4 NO, zero NC."},{"question":"What is the difference between 3RH6140-1KB40 and 3RH6140-1BB40?","answer":"The 3RH6140-1KB40 has a 24 V DC coil and four NO contacts. The 3RH6140-1BB40 would have a different coil voltage or contact configuration — the order code suffix encodes these differences. For exact specifications of the -1BB40 variant, refer to its own datasheet."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH6140-1KB40","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/3RH6140-1KB40 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}