{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1140-1BW40-0AA6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1140-1BW40-0AA6","canonicalUrl":"https://aoctrl.com/siemens/3RH1140-1BW40-0AA6","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1140-1BW40-0AA6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH1140-1BW40-0AA6, auxiliary contactor, 48 V DC coil, 4 NO instantaneous contacts, 10 A AC-12 rated operational current, size S00, IP20 front protection.","salesMarkdown":"It carries 4 normally-open instantaneous contacts, each rated for 10 A at AC-12 (resistive) duty, so it handles pilot-duty loads like PLC inputs, indicator lamps, and small solenoid valves without a separate interposing relay. The 48 V DC coil draws 3.2 W during both pick-up and hold, which means the coil-supply transformer or power supply must be sized for that continuous draw — no inrush peak to worry about, but the steady-state load is constant. The contact ratings drop with voltage: at 110 V DC the contacts are rated for 1 A, at 220 V DC for 0.27 A, and at 690 V DC for 1 A, so the same contact block can switch a range of DC loads as long as the current stays within the curve. That matters when the auxiliary contacts feed a PLC input or a safety relay: you won't get nuisance failures from oxide films on the silver contacts. Size S00 means it shares the same 45 mm width and 57.5 mm height footprint as the smallest SIRIUS contactors. The 3RH1140-1BW40-0AA6 is a control-circuit component with a 48 V DC coil. It sits alongside the 3RT10xx power contactors in a SIRIUS system. RoHS compliance date is listed as July 1, 2006, meaning the design predates the EU RoHS directive but the part is manufactured to comply. No explicit UL or CSA listing is in the evidence, so verify with your local Siemens representative if the installation requires those marks.","metaTitle":"Siemens 3RH1140-1BW40-0AA6 SIRIUS Auxiliary Contactor, 48 V","metaDescription":"Siemens SIRIUS 3RH1140-1BW40-0AA6 auxiliary contactor, 48 V DC coil, 4 NO contacts, 10 A rated current. Active production. S00 size for compact panel mounting. RFQ for pricing.","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":"48 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","operational current at AC-12 maximum":"10 A","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","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=214631&mlfb=3RH1140-1BW40-0AA6","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1140-1BW40-0AA6/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1140-1BW40-0AA6","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/3RH1140-1BW40-0AA6 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}}