{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1140-1BB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1140-1BB40","canonicalUrl":"https://aoctrl.com/siemens/3RH1140-1BB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1140-1BB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH1140-1BB40 auxiliary contactor, size S00, 24 V DC coil, 4 instantaneous contacts, rated 10 A at 24 V, IP20, 45 mm width.","salesMarkdown":"The 3RH1140-1BB40: Rated 10 A at 24 V, the contacts cover signalling, PLC output interlocking, and small auxiliary loads common in motor control centres and distribution panels. ## Contact ratings in context Mechanical endurance is rated at 30 million operations, and contact reliability is specified as one incorrect switching per 100 million operations at 17 V, 1 mA — suitable for dry-circuit applications where low-level signal integrity matters. The 45 mm width and 57.5 mm height fit the S00 footprint; depth is 72 mm. Mounting allows screw fastening or snap-on onto DIN rail, and the unit can be rotated ±180° on a vertical surface or tilted ±22.5° forward/backward, giving flexibility in tight panels. Terminal capacity accepts solid conductors: 2 x (0.5...1.5 mm²), 2 x (0.75...2.5 mm²), and 2 x 4 mm². Front protection is IP20, adequate for enclosed cabinet use. Pollution degree 3. Coil power consumption is 3.2 W DC for both closing and holding, so no additional inrush beyond that steady draw.","metaTitle":"Siemens 3RH1140-1BB40 SIRIUS Aux. Contactor, 24V DC, 4 Conta","metaDescription":"Current-production SIRIUS S00 auxiliary contactor. 4 instantaneous contacts, rated 10 A at 24 V, 6 A at 230 V. IP20, 45 mm wide. Screw/snap-on mounting. RoHS-compliant. Source to o","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"72 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Width":"45 mm","Height":"57.5 mm","Rated Value":"24 V","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-55 ... +80 °C","Fastening Method":"screw and snap-on mounting","Full-Scale Value":"1.1","Shock Resistance":"10g / 5 ms and 5g / 10 ms","Delayed Switching":"0","Lagging Switching":"0","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","Product Brand Name":"SIRIUS","Contact Reliability":"one incorrect switching operation of 100 million switching operations (17 V, 1 mA)","Degree Of Pollution":"3","Product Designation":"Auxiliary contactor","at 24 V rated value":"10 A","Of Contactor Typical":"30 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.27 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 500 V rated value":"2 A","at 690 V rated value":"1 A","Instantaneous Contact":"4","For Auxiliary Contacts":"0","Make-Before-Break Switching":"0","Substance Prohibitance (Date)":"01.07.2006 00:00:00","protection class IP on the front":"IP20","Product Extension Auxiliary Switch":"Yes","closing power of magnet coil at DC":"3.2 W","holding power of magnet coil at DC":"3.2 W","reference code acc. to IEC 81346-2":"K","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","operational current at AC-12 maximum":"10 A","with low demand rate acc. to SN 31920":"40 %","with high demand rate acc. to SN 31920":"75 %","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)","Touch Protection Against Electrical Shock":"finger-safe","Of Auxiliary Contacts Instantaneous Contact":"0","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"4","Type Of Voltage Of The Control Supply Voltage":"DC","B10 value with high demand rate acc. to SN 31920":"1 000 000; With 0.3 x Ie","Identification Number And Letter For Switching Elements":"40 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Required Spacing With Side-By-Side Mounting At The Side":"0 mm","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","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","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000","Design Of The Fuse Link For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$20.00","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=476060&mlfb=3RH1140-1BB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1140-1BB40/alternatives.json"},"ai":{"faq":[{"question":"What wire sizes does the terminal accept?","answer":"It accepts solid conductors: 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), and 2x 4 mm²."},{"question":"What compliance documentation is available for this part?","answer":"RoHS compliance is evidenced by a substance prohibition date of 01.07.2006. No UL or CE markings are stated in the provided data; consult the full datasheet for third-party approvals."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1140-1BB40","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/3RH1140-1BB40 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}}