{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1140-1BB40-ZW96","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1140-1BB40-ZW96","canonicalUrl":"https://aoctrl.com/siemens/3RH1140-1BB40-ZW96","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1140-1BB40-ZW96","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, 3RH1140-1BB40-ZW96, 24 V DC coil, 4 NO instantaneous contacts, 10 A rated at 24 V, S00 size, screw and snap-on DIN rail mounting, IP20 front.","salesMarkdown":"The Siemens 3RH1140-1BB40-ZW96 is a SIRIUS auxiliary contactor — a 4-pole, 24 V DC coil device with 4 NO instantaneous contacts, rated 10 A at 24 V. It's built for the S00 contactor frame size, so it shares the 45 mm width and 57.5 mm height of the SIRIUS 3RT1 power contactors, with a 72 mm depth that clears the standard DIN-rail enclosure depth. The 4 NO contacts are rated for switching at multiple voltages: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, down to 1 A at 690 V. This means the contactor handles signal-level loads (PLC outputs, pilot devices) through to moderate auxiliary circuits in motor starter buckets, as long as the load current stays under the voltage-specific curve. For a Tier-1 line running 24 V PLC inputs, this means the contactor won't introduce nuisance faults on low-level signals. Wire termination accepts 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm² solid, or the AWG equivalents (2x 20-16, 2x 18-14, 1x 12).","metaTitle":"Siemens 3RH1140-1BB40-ZW96 SIRIUS Auxiliary Contactor, 24 V","metaDescription":"Siemens SIRIUS auxiliary contactor 3RH1140-1BB40-ZW96 with 24 V DC coil, 4 NO contacts, rated 10 A at 24 V. Current production. DIN rail mount, IP20. Order to RFQ.","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)":"07/01/2006","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","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","reference code according to IEC 81346-2":"K","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","with low demand rate according to SN 31920":"40 %","Of Auxiliary Contacts Instantaneous Contact":"0","with high demand rate according to SN 31920":"75 %","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","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":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=500873&mlfb=3RH1140-1BB40-ZW96","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1140-1BB40-ZW96/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for this auxiliary contactor?","answer":"24 V DC coil, 4 NO contacts rated 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 1 A at 690 V. Coil holding power is 3.2 W DC. Contact reliability is 1 failure per 100 million operations at 17 V, 1 mA."},{"question":"What is the physical size and mounting?","answer":"S00 frame size: 45 mm wide, 57.5 mm high, 72 mm deep. Mounts on 35 mm DIN rail via screw or snap-on. IP20 front protection. Wire range 0.5 to 4 mm² solid."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1140-1BB40-ZW96","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-ZW96 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}}