{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1140-1BF40-0AA6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1140-1BF40-0AA6","canonicalUrl":"https://aoctrl.com/siemens/3RH1140-1BF40-0AA6","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1140-1BF40-0AA6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, auxiliary contactor, size S00, 4 NO instantaneous contacts, 110 V DC coil, screw and snap-on mounting, IP20 front, 45 x 57.5 x 72 mm.","salesMarkdown":"The Siemens 3RH1140-1BF40-0AA6 is a SIRIUS auxiliary contactor in frame size S00, carrying four normally-open instantaneous contacts and a 110 V DC coil. It is designed to switch control signals and auxiliary loads in motor control centers and panel builds — not to switch main motor current, but to extend the I/O of a contactor or relay base. The contacts are rated for switching at several voltage levels: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. These are the thermal current ratings for the contact set — they define the maximum continuous current the contacts can carry at each voltage. For a 24 V DC control circuit, the 10 A rating gives ample headroom for pilot lights, solenoid valves, and PLC input modules. At 690 V, the 1 A rating still handles most auxiliary transformer and indicator loads. The footprint is 45 mm wide, 57.5 mm tall, and 72 mm deep — a compact S00 envelope that fits standard 45 mm DIN-rail spacing. Wire sizing for the auxiliary contacts accepts 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm² solid, plus the AWG equivalents. The spring-cage or screw terminals (fastening method is screw and snap-on) handle the range cleanly — strip length and ferrule choice follow standard panel practice. Shock resistance is 10g for 5 ms and 5g for 10 ms, and pollution degree is rated 3 (conductive pollution or dry non-conductive pollution that becomes conductive due to condensation). The substance prohibition date of 07/01/2006 indicates RoHS compliance per the EU directive effective from that date.","metaTitle":"Siemens 3RH1140-1BF40-0AA6 SIRIUS Auxiliary Contactor, 110 V","metaDescription":"Siemens SIRIUS 3RH1140-1BF40-0AA6 auxiliary contactor, size S00, 4 NO contacts, 110 V DC coil, IP20 front. Active production. Sourced to order against 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":"110 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=319265&mlfb=3RH1140-1BF40-0AA6","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1140-1BF40-0AA6/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to 3RH1140-1BF40-0AA6?","answer":"The 3RH2140-1BP40 is a peer in the same SIRIUS family, but it carries a 24 V DC coil versus the 110 V DC coil on this part. The contact configuration and frame size differ — verify the coil voltage and contact count before substituting into an existing panel design."},{"question":"Where can I buy 3RH1140-1BF40-0AA6 and how is it quoted?","answer":"This part is sourced to order against an RFQ through independent industrial-automation distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for your volume and delivery window."},{"question":"What compliance documentation does Siemens provide for 3RH1140-1BF40-0AA6?","answer":"The part carries a substance prohibition date of 07/01/2006, indicating RoHS compliance. The IP20 front protection and pollution degree 3 rating are documented in the spec sheet. For full UL, IEC, or REACH declarations, the manufacturer's standard compliance documentation applies to this SIRIUS series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1140-1BF40-0AA6","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/3RH1140-1BF40-0AA6 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}}