{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1140-2BB40-ZW98","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1140-2BB40-ZW98","canonicalUrl":"https://aoctrl.com/siemens/3RH1140-2BB40-ZW98","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1140-2BB40-ZW98","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 24 V DC coil, 4 NO instantaneous contacts, screw and snap-on mounting, IP20 front protection, 45 mm width.","salesMarkdown":"Contacts are rated 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V, which covers most control-circuit switching in a 400 V panel. The 45 mm width and screw-and-snap-on mounting mean it clips directly onto a DIN rail alongside a SIRIUS contactor or motor starter, sharing the same bus system. Screw and snap-on mounting onto a DIN rail. Four instantaneous NO contacts — no delayed, lagging, or make-before-break variants on this order code. Rated operational currents: 10 A at 24 V, 1 A at 110 V, 0.27 A at 220 V, 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. The 6 kV rated surge voltage resistance gives confidence for switching in industrial networks with transient exposure. Contact reliability is specified as one incorrect switching operation per 100 million at 17 V, 1 mA — a solid figure for PLC-level signal switching. Screw terminals accept 2x (0.25 to 2.5 mm²) solid or stranded conductors, or 2x (24 to 14 AWG). The dual-conductor capacity is useful for daisy-chaining control voltage across multiple devices without extra terminal blocks. Strip length and torque values follow standard SIRIUS practice for size S00.","metaTitle":"Siemens 3RH1140-2BB40-ZW98 SIRIUS Auxiliary Contactor, 24 V","metaDescription":"Siemens 3RH1140-2BB40-ZW98 SIRIUS auxiliary contactor, size S00, 24 V DC coil, 4 instantaneous NO contacts rated 10 A at 24 V. IP20 front, screw/snap-on mount, 45 mm wide. Current","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)":"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 (24 ... 14)","operational current at AC-12 maximum":"10 A","reference code according to IEC 81346-2":"K","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","with low demand rate according to SN 31920":"40 %","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","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":"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=392429&mlfb=3RH1140-2BB40-ZW98","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1140-2BB40-ZW98/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RH1140-2BB40-ZW98?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the difference between 3RH1140-2BB40-ZW98 and 3RH2140-1BP40?","answer":"The 3RH2140-1BP40 is a different SIRIUS auxiliary contactor variant — it carries a different contact configuration and coil voltage. The 3RH1140-2BB40-ZW98 has 4 NO instantaneous contacts with a 24 V DC coil, while the 3RH2140-1BP40 uses a different contact arrangement. Both share the S00 footprint and snap-on mounting, so they are mechanically interchangeable in the same DIN-rail slot, but the contact wiring differs."},{"question":"What compliance documentation does Siemens provide for 3RH1140-2BB40-ZW98?","answer":"The part carries RoHS compliance with a substance prohibition date of July 1, 2006. Pollution degree 3 rating indicates suitability for industrial environments. Standard Siemens SIRIUS documentation includes a CE declaration and manufacturer's declaration for the EU low-voltage directive."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1140-2BB40-ZW98","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-ZW98 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}}