{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1140-2BB40-0TK1-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1140-2BB40-0TK1-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RH1140-2BB40-0TK1-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1140-2BB40-0TK1-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, 3RH1140-2BB40-0TK1-ZX95, 24 V DC coil, 4 NO contacts, size S00, screw and snap-on mounting.","salesMarkdown":"It's the part that extends the control logic of a motor starter or feeds status back to a PLC without pulling more load through the main contactor's aux block. The 24 V DC coil draws 3.2 W to pull in and holds at the same 3.2 W — no drop in holding power, so the coil runs warm but steady. If you're swapping this into an existing panel, check that your 24 V DC supply can handle the inrush; the coil's closing power is the same as its holding power, which means no spike, but the steady draw is constant. The 4 NO contacts are rated by voltage: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, 1 A at 690 V. That derating curve matters — at 400 V line-to-line you're limited to 3 A through the aux contacts, so don't try to switch a 5 A pilot load at that voltage. Size S00 frame, 45 mm wide, 60 mm tall, 73 mm deep. Screw and snap-on mounting to DIN rail. That's useful when you're shoehorning it into a crowded enclosure and need to orient the contactor to clear a busbar or duct. Wire termination accepts 2x (0.25... 2.5 mm²) solid or stranded — standard control-circuit sizing. RoHS compliance date of 01.07.2006 is on record.","metaTitle":"Siemens 3RH1140-2BB40-0TK1-ZX95 SIRIUS Auxiliary Contactor,","metaDescription":"Siemens SIRIUS 3RH1140-2BB40-0TK1-ZX95 auxiliary contactor, 24 V DC coil, 4 NO contacts, size S00. Rated 10 A at 24 V, IP20 front. Active production. Quoted 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","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)":"01.07.2006","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","reference code acc. to IEC 81346-2":"K","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (24 ... 14)","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 (0.25 ... 1.5 mm²)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Touch Protection Against Electrical Shock":"finger-safe","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","B10 value with high demand rate acc. to SN 31920":"1 000 000; With 0.3 x Ie","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":"Cage Clamp 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=334127&mlfb=3RH1140-2BB40-0TK1-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1140-2BB40-0TK1-ZX95/alternatives.json"},"ai":{"faq":[{"question":"What is the contact configuration on this auxiliary contactor?","answer":"It has 4 normally-open (4 NO) instantaneous contacts. No delayed, lagging, or make-before-break switching — all four close when the coil pulls in."},{"question":"What wire sizes does this contactor accept?","answer":"Each terminal accepts 2 conductors of 0.25 to 2.5 mm² solid or stranded wire. That's standard for control-circuit aux contacts."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1140-2BB40-0TK1-ZX95","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/3RH1140-2BB40-0TK1-ZX95 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}}