{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2140-1HB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2140-1HB40","canonicalUrl":"https://aoctrl.com/siemens/3RH2140-1HB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2140-1HB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS coupling relay, 3RH2140-1HB40, size S00, 4 NO instantaneous contacts, 24 VDC coil, 10 A rated, screw and snap-on 35 mm DIN rail mounting.","salesMarkdown":"The Siemens SIRIUS 3RH2140-1HB40 is a coupling relay — a contactor-style device built to switch auxiliary circuits in control panels. The size S00 footprint (45 mm wide, 73 mm deep, 57.5 mm high) keeps it compact for dense panel layouts. The 24 VDC coil draws 2.8 W on both closing and holding — no power penalty for keeping it energized. Terminals accept solid or stranded wire: 2× (0.5 to 1.5 mm²), 2× (0.75 to 2.5 mm²), or 2× 4 mm². ## Switching capacity across voltages The 4 NO contacts are rated for switching across a wide voltage range. At 24 V the rated current is 10 A; at 230 V it's also 10 A. Higher voltages see derating: 3 A at 110 V, 1.2 A at 220 V, 3 A at 400 V, 2 A at 500 V, 1 A at 690 V, and 0.26 A at 600 V. The DC ratings at 60 V and 440 V are 4.7 A and 0.5 A respectively — useful for mixed AC/DC control circuits.","metaTitle":"Siemens 3RH2140-1HB40 SIRIUS Coupling Relay, 4 NO, 24 VDC, 1","metaDescription":"Siemens SIRIUS 3RH2140-1HB40 coupling relay, 4 instantaneous NO contacts, 24 VDC coil, 10 A rated. Screw and snap-on DIN rail mount, size S00. Current production, sourced 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":"7 ... 20 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","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/3ee397d9d685b6e84416cc83eae71995.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=349167&mlfb=3RH2140-1HB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2140-1HB40/alternatives.json"},"ai":{"faq":[{"question":"Will 3RH2140-1HB40 drop into a panel specified for 3RH2140-1BP40?","answer":"Both are size S00 Siemens SIRIUS coupling relays with the same 45 mm width and DIN rail mounting. The 1BP40 variant uses a different coil voltage; check your panel's coil supply. Mechanically they share the same footprint and clearances."},{"question":"What compliance documentation does Siemens provide for 3RH2140-1HB40?","answer":"RoHS compliance is confirmed with a substance prohibition date of October 1, 2009. The SIRIUS series typically carries CE, UL, and CSA certifications — verify the specific markings on the nameplate for your jurisdiction."},{"question":"What are the key dimensions of 3RH2140-1HB40?","answer":"Width 45 mm, height 57.5 mm, depth 73 mm. Minimum clearance: 10 mm upward, 10 mm forward, 10 mm downward, 6 mm at the sides."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2140-1HB40","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/3RH2140-1HB40 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}}