{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1140-2AD00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1140-2AD00","canonicalUrl":"https://aoctrl.com/siemens/3RH1140-2AD00","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1140-2AD00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH1140-2AD00 auxiliary contactor, size S00, 4 NO instantaneous contacts, 10 A AC-12, screw and snap-on mounting.","salesMarkdown":"The Siemens SIRIUS 3RH1140-2AD00 is a size S00 auxiliary contactor with four normally-open instantaneous contacts, rated 10 A in AC-12 duty at 400 V. It is designed to switch control-circuit loads — pilot lights, PLC inputs, contactor coils — rather than motor power. The 10 A AC-12 rating means it handles resistive and lightly inductive control loads up to that current, which covers most 24 VDC and 230 VAC control circuits in a standard panel. Mounting is screw or snap-on onto DIN rail, with the S00 footprint matching the same panel cutout as the 3RT2 contactor family. The four NO contacts are rated across the full control-voltage range: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V. These are AC-12 values — the relevant duty class for resistive control loads. For DC switching, the 24 V rating holds at 10 A, dropping to 1 A at 110 V and 0.27 A at 220 V. The contacts are instantaneous only — no delayed, lagging, or make-before-break options on this variant. ## Environmental limits and installation conditions The unit withstands shock at 10g / 5 ms and 5g / 10 ms, adequate for panel-mounted equipment in industrial machinery. Side clearance is 0 mm — devices can be mounted flush side-by-side without derating. Front face protection is IP20, so the contactor is touch-safe once installed in a closed panel. Wire termination accepts 2x solid conductors from 0.25 to 2.5 mm², covering standard control wiring. The screw terminals are compatible with ferruled ends for consistent connection quality.","metaTitle":"Siemens 3RH1140-2AD00 SIRIUS Auxiliary Contactor, 4 NO, 10 A","metaDescription":"Siemens SIRIUS 3RH1140-2AD00 auxiliary contactor, size S00, 4 NO instantaneous contacts, rated 10 A AC-12 at 400 V. Current production, sourced to order.","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 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","At The Side":"0 mm","On The Front":"IP20","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","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","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 50 Hz rated value":"42 V","at 500 V rated value":"2 A","at 60 Hz rated value":"42 V","at 690 V rated value":"1 A","Instantaneous Contact":"4","For Auxiliary Contacts":"0","Make-Before-Break Switching":"0","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","Apparent holding power of magnet coil at AC":"4.6 V·A","Apparent pick-up power of magnet coil at AC":"27 V·A","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":"AC","Inductive power factor with closing power of the coil":"0.8","Identification number and letter for switching elements":"40 E","Inductive power factor with the holding power of the coil":"0.27","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=307902&mlfb=3RH1140-2AD00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1140-2AD00/alternatives.json"},"ai":{"faq":[{"question":"What wire sizes does the 3RH1140-2AD00 accept?","answer":"The terminals accept 2x solid conductors from 0.25 to 2.5 mm² per clamp."},{"question":"What are the key contact ratings for this auxiliary contactor?","answer":"Four NO contacts rated 10 A AC-12 at 400 V. DC ratings: 10 A at 24 V, 1 A at 110 V, 0.27 A at 220 V."},{"question":"What is the mechanical life expectancy?","answer":"Typical mechanical endurance is 30 million operating cycles for the contactor size S00."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1140-2AD00","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/3RH1140-2AD00 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}}