{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1140-1AG10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1140-1AG10","canonicalUrl":"https://aoctrl.com/siemens/3RH1140-1AG10","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1140-1AG10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 4 NO instantaneous contacts, rated 10 A at 24 V, screw and snap-on mounting, IP20 front, 45 mm width.","salesMarkdown":"It switches control signals and auxiliary loads in motor starter and contactor assemblies — the four NO contacts mirror the main contactor's state for status feedback, interlocks, or PLC inputs. The 10 A rating at 24 V covers most 24 VDC control circuits; at 230 V AC the contacts are rated 6 A, at 400 V AC 3 A, and at 690 V AC 1 A. Width is 45 mm, height 57.5 mm, depth 72 mm. The screw terminals accept 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), or 2x 4 mm² solid. ## Contact reliability and switching life Contact reliability is specified as one incorrect switching operation per 100 million switching operations at 17 V and 1 mA — that is the low-level switching floor; below that, use a separate interface relay. Typical mechanical life of the contactor is 30 million operations. Shock resistance is 10g / 5 ms and 5g / 10 ms, enough for most industrial machinery but not for high-vibration mobile equipment.","metaTitle":"Siemens 3RH1140-1AG10 SIRIUS Auxiliary Contactor, 4 NO, 10 A","metaDescription":"Siemens 3RH1140-1AG10 SIRIUS auxiliary contactor, size S00, 4 NO contacts, rated 10 A at 24 V. IP20 front, screw and snap-on mounting. Available to order.","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","at 60 Hz":"0.85 ... 1.1","1 Rated Value":"60 Hz","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","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 50 Hz rated value":"100 V","at 500 V rated value":"2 A","at 60 Hz rated value":"110 V","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","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","apparent holding power of magnet coil at AC":"4.6 V·A","apparent pick-up power of magnet coil at AC":"27 V·A","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","B10 value with high demand rate acc. to SN 31920":"1 000 000; With 0.3 x Ie","Inductive Power Factor With Closing Power Of The Coil":"0.8","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","Inductive Power Factor With The Holding Power Of The Coil":"0.27","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":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=427704&mlfb=3RH1140-1AG10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1140-1AG10/alternatives.json"},"ai":{"faq":[{"question":"Who supplies 3RH1140-1AG10 and how is it quoted?","answer":"We source the 3RH1140-1AG10 through our industrial automation supply chain. Volume pricing and availability are confirmed at quote time against an RFQ."},{"question":"What is the closest functional second-source to 3RH1140-1AG10?","answer":"The 3RH2131-2AK60 is a similar SIRIUS auxiliary contactor but carries different contact configuration and ratings. Verify your control voltage and contact count before substituting — the 3RH1140-1AG10 has 4 NO contacts; the 3RH2131-2AK60 uses a different contact arrangement. A direct drop-in without rewiring is not guaranteed."},{"question":"What is the depth of 3RH1140-1AG10?","answer":"The depth is 72 mm. Overall dimensions are 45 mm width by 57.5 mm height."},{"question":"What wire sizes does the 3RH1140-1AG10 accept?","answer":"The screw terminals accept 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), or 2x 4 mm² solid conductor. For AWG: 2x (20...16), 2x (18...14), 1x 12."},{"question":"What compliance documentation does Siemens provide for 3RH1140-1AG10?","answer":"The part carries a substance prohibitance date of 01.07.2006, indicating RoHS compliance. The reference code per IEC 81346-2 is K. Full compliance documentation (RoHS, REACH, UL) is available from Siemens upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1140-1AG10","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/3RH1140-1AG10 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}}