{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1140-1BA40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1140-1BA40","canonicalUrl":"https://aoctrl.com/siemens/3RH1140-1BA40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1140-1BA40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 3RH1140-1BA40, 4 NO contacts, AC-12 rated 10 A, 45 mm width, screw and snap-on mounting.","salesMarkdown":"The Siemens 3RH1140-1BA40 is a SIRIUS auxiliary contactor in size S00, carrying four normally-open instantaneous contacts. Rated operating current hits 10 A in AC-12 duty (resistive loads at line frequency). For inductive switching at higher voltages, the contactor is rated 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. The DC coil draws 3.2 W both on pickup and hold — no power reduction after sealing, so factor that into the control transformer sizing. ## Mounting and environment Zero spacing required at the side, so you can pack contactors tight on the rail. Pollution degree 3 means it tolerates conductive dust and occasional condensation — typical for industrial control panels, but not for direct washdown zones. Shock resistance is 10g / 5 ms and 5g / 10 ms, enough for most machine-mounted applications. Wire capacity accepts 2x conductors from 0.5 to 1.5 mm², 2x from 0.75 to 2.5 mm², or 2x 4 mm² solid. That covers common control wiring sizes without needing ferrules, though ferruled stranded wire is fine within the same cross-sections.","metaTitle":"Siemens 3RH1140-1BA40 SIRIUS Auxiliary Contactor, 4 NO, 45mm","metaDescription":"Siemens 3RH1140-1BA40 SIRIUS auxiliary contactor, size S00, 4 NO contacts, 45mm wide. AC-12 rated 10 A. Screw/snap-on mount. Current production. Quoted on request.","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","Maximum":"2 000 m","At The Side":"0 mm","Rated Value":"12 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 81346-2":"K","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)","at AWG conductors for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"screw-type terminals","Of Auxiliary Contacts Instantaneous Contact":"0","Number of NC contacts for auxiliary contacts":"0","Number of NO contacts for auxiliary contacts":"4","with degree of pollution 3 at AC rated value":"690 V","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=451813&mlfb=3RH1140-1BA40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1140-1BA40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RH1140-1BA40 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time."},{"question":"What is 3RH1140-1BA40's listed depth?","answer":"The depth is 72 mm. Combined with the 45 mm width and 57.5 mm height, it occupies a compact footprint on the DIN rail."},{"question":"What wire sizes does 3RH1140-1BA40 accept?","answer":"The terminals accept 2x conductors of 0.5 to 1.5 mm², 2x of 0.75 to 2.5 mm², or 2x of 4 mm² solid. This covers standard control wiring without special preparation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1140-1BA40","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/3RH1140-1BA40 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}}