{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2140-1BF40-0AA6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2140-1BF40-0AA6","canonicalUrl":"https://aoctrl.com/siemens/3RH2140-1BF40-0AA6","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2140-1BF40-0AA6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2140-1BF40-0AA6, auxiliary contactor, size S00, 4 NO instantaneous contacts, 110 V DC coil, screw and snap-on 35 mm DIN rail mounting.","salesMarkdown":"It carries four normally-open instantaneous contacts, rated for switching at 110 V DC coil voltage. Mounting is via screw or snap-on onto a 35 mm standard mounting rail, with a footprint of 45 mm wide, 57.5 mm high, and 73 mm deep. ## Switching capacity and contact ratings The contacts handle 10 A at 24 V and 230 V rated values, 4.7 A at 60 V, 3 A at 110 V and 400 V, 1.2 A at 220 V, 0.5 A at 440 V, 2 A at 500 V, 0.26 A at 600 V, and 1 A at 690 V. This voltage-dependent derating means the 3RH2140-1BF40-0AA6 is suited for mixed-voltage control panels where the same contact block switches both 24 V DC sensor signals and 230 V AC pilot devices. The magnet coil draws 4 W during closing and 4 W holding, both at DC, so the coil power budget is flat — no inrush spike to size a power supply around. Mechanical service life is rated at 30,000,000 operating cycles typical, with a maximum switching frequency of 10,000 operations per hour at AC. Terminals accept solid or stranded conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm². The S00 frame size matches the Siemens 3RT2 and 3RT1 contactor series, so this auxiliary contactor block mounts directly alongside or on top of those contactors using the same DIN rail or screw fixing. The 4 NO contact configuration is typical for adding extra interlock or status feedback contacts to a motor starter.","metaTitle":"Siemens 3RH2140-1BF40-0AA6 SIRIUS Auxiliary Contactor, 4 NO,","metaDescription":"Siemens SIRIUS 3RH2140-1BF40-0AA6 auxiliary contactor, size S00. 4 NO contacts, 110 V DC coil. Screw and snap-on 35 mm DIN rail. Current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Width":"45 mm","at AC":"10 000 1/h","at DC":"7 ... 13 ms","Height":"57.5 mm","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","Rated Value":"110 V","Initial Value":"0.8","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail","Full-Scale Value":"1.1","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","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"Auxiliary contactor","at 24 V rated value":"10 A","at 60 V rated value":"4.7 A","Of Contactor Typical":"30 000 000","at 110 V rated value":"3 A","at 220 V rated value":"1.2 A","at 230 V rated value":"10 A","at 400 V rated value":"3 A","at 440 V rated value":"0.5 A","at 500 V rated value":"2 A","at 600 V rated value":"0.26 A","at 690 V rated value":"1 A","Instantaneous Contact":"4","Relative Humidity Minimum":"10 %","Substance Prohibitance (Date)":"10/01/2009","Product Extension Auxiliary Switch":"Yes","closing power of magnet coil at DC":"4 W","holding power of magnet coil at DC":"4 W","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 12","operating frequency at DC-12 maximum":"1 000 1/h","operating frequency at DC-13 maximum":"1 000 1/h","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)","with low demand rate according to SN 31920":"40 %","with high demand rate according to SN 31920":"73 %","number of NO contacts for auxiliary contacts":"4","Type Of Voltage Of The Control Supply Voltage":"DC","contact rating of auxiliary contacts according to UL":"A600 / Q600","Identification Number And Letter For Switching Elements":"40 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","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","design of the miniature circuit breaker for short-circuit protection of the auxiliary circuit up to 230 V":"C characteristic: 6 A; 0.4 kA"}},"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=169005&mlfb=3RH2140-1BF40-0AA6","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2140-1BF40-0AA6/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions for panel layout?","answer":"Width is 45 mm, height is 57.5 mm, and depth is 73 mm. Minimum clearance distances are 10 mm upwards, forwards, and downwards, and 6 mm at the side."},{"question":"What compliance documentation is available?","answer":"RoHS compliance is dated to October 1, 2009. The product is a Siemens SIRIUS component, which typically carries CE, UL, and CSA certifications for the series."},{"question":"What is the coil voltage and power draw?","answer":"The coil is rated at 110 V DC, drawing 4 W during closing and 4 W holding."},{"question":"Will this fit in a panel designed for a 3RT2028-1BB40 contactor?","answer":"Yes, the 3RH2140-1BF40-0AA6 shares the S00 frame size and 35 mm DIN rail mounting with the 3RT2 series contactors, so it drops into the same footprint without rewiring the rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2140-1BF40-0AA6","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/3RH2140-1BF40-0AA6 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}}