{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1140-2BE40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1140-2BE40","canonicalUrl":"https://aoctrl.com/siemens/3RH1140-2BE40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1140-2BE40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 4 NO + 0 NC, rated 10 A AC-12 at 24 V, 45 mm wide, screw and snap-on mounting, IP20 front.","salesMarkdown":"It carries four normally open (4 NO) instantaneous contacts and zero NC, make-before-break, or delayed poles — a clean NO-only block for extending a contactor's auxiliary circuit. Rated operational current reaches 10 A at 24 V (AC-12 duty), 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V — the AC-12 resistive load curve governs the contact rating, so it is suited for pilot-duty and control transformer loads, not motor starting. The maximum AC-12 rating is 10 A. Mounts via screw or snap-on to DIN rail (35 mm), occupies 45 mm width, 60 mm height, 73 mm depth. Pollution degree 3 (industrial environment), IP20 on the front face. Coil holding power is 3.2 W DC, and the coil closing power is also 3.2 W DC. Surge voltage resistance rated at 6 kV. Shock resistance 10g / 5 ms and 5g / 10 ms. ## Panel Integration Solid connection accepts 2x (0.25 to 2.5 mm²) per terminal.","metaTitle":"Siemens 3RH1140-2BE40 SIRIUS Auxiliary Contactor, 4 NO, 10 A","metaDescription":"Siemens SIRIUS 3RH1140-2BE40 auxiliary contactor, 4 NO contacts, rated 10 A AC-12 at 24 V, 45 mm wide, IP20 front. Current lifecycle. Available to order; confirm current pricing an","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45 mm","Height":"60 mm","Maximum":"2 000 m","At The Side":"0 mm","Rated Value":"60 V","On The Front":"IP20","Initial Value":"0.8","Mounting type":"screw and snap-on mounting","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","Auxiliary switch":"Yes","During Operation":"-25 ... +60 °C","During Transport":"-55 ... +80 °C","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","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","Closing power of magnet coil at DC":"3.2 W","Holding power of magnet coil at DC":"3.2 W","Operating current at AC-12 maximum":"10 A","Surge voltage resistance rated value":"6 kV","Reference code acc. to DIN EN 61346-2":"K","Reference code acc. to DIN EN 81346-2":"K","with low demand rate acc. to SN 31920":"40 %","With Degree Of Pollution 3 Rated Value":"690 V","with high demand rate acc. to SN 31920":"75 %","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","at AWG conductors for auxiliary contacts":"2x (24 ... 14)","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"Cage Clamp terminals","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","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","Identification number and letter for switching elements":"40 E","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","Of The Contactor With Added Electronics-Compatible Auxiliary Switch Block Typical":"5 000 000"}},"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=86789&mlfb=3RH1140-2BE40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1140-2BE40/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RH1140-2BE40?","answer":"The 3RH2140-1BP40 is a sibling in the same SIRIUS family but carries a different contact configuration — verify your required NO/NC count before substituting. The 3RH1140-2BE40 has 4 NO, 0 NC; the 3RH2140-1BP40 may differ."},{"question":"What is the depth of 3RH1140-2BE40?","answer":"The depth is 73 mm."},{"question":"What wire size does the 3RH1140-2BE40 accept?","answer":"The solid connection accepts 2x (0.25 to 2.5 mm²) per terminal."},{"question":"Will 3RH1140-2BE40 drop into a panel specified for 3RH2140-1BP40 without rewiring?","answer":"The physical footprint (size S00, 45 mm wide) and DIN-rail mounting are identical, so mechanical fit is the same. However, verify the contact configuration — the 3RH1140-2BE40 has 4 NO, 0 NC, while the 3RH2140-1BP40 may have a different NO/NC split. Wiring changes may be needed if the circuit requires NC contacts."},{"question":"Where can I buy 3RH1140-2BE40?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1140-2BE40","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/3RH1140-2BE40 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}}