{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2140-2FB40-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2140-2FB40-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RH2140-2FB40-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2140-2FB40-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, 3RH2140-2FB40-1AA0, size S00, 4 instantaneous NO contacts, 10 A at 24 V and 230 V, 45 mm width, 73 mm depth, 70 mm height, screw and snap-on DIN rail mounting.","salesMarkdown":"## SIRIUS auxiliary contactor, size S00 — 4 NO, 10 A The Siemens 3RH2140-2FB40-1AA0 is a SIRIUS auxiliary contactor in size S00, with 4 instantaneous normally-open contacts. It is rated 10 A at both 24 V and 230 V, making it a direct fit for control circuits in motor starter assemblies or PLC output isolation. Mounting is screw or snap-on onto 35 mm DIN rail, with a footprint of 45 mm wide by 73 mm deep by 70 mm tall — standard for the S00 frame. Clearance requirements: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the side. ## Switching ratings and contact life The contactor carries a full voltage ladder: 10 A at 24 V and 230 V, 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 covers both control and light power switching across common industrial voltages. Mechanical life is rated at 30 million operations typical. The arcing time is 10 to 15 ms, and the closing power of the DC magnet coil is 4 W. A built-in diode surge suppressor protects the coil drive circuit. ## Environmental tolerance and compliance Operating temperature range is -25 to +60 °C; storage range is -55 to +80 °C. Pollution degree 3 (industrial environment with conductive pollution). Relative humidity minimum 10 %. Lifecycle status is current production. The part carries RoHS/REACH compliance with a substance prohibition date of 10/01/2009. Sourced to order against BOM quantities; availability and current pricing confirmed at RFQ.","metaTitle":"Siemens 3RH2140-2FB40-1AA0 SIRIUS Auxiliary Contactor, 4 NO","metaDescription":"Siemens SIRIUS auxiliary contactor 3RH2140-2FB40-1AA0, size S00, 4 instantaneous NO contacts, rated 10 A at 24 V and 230 V. Current production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Width":"45 mm","at AC":"10 000 1/h","at DC":"38 ... 65 ms","title":"3RH2140-2FB40-1AA0","Height":"70 mm","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","Rated Value":"24 V","description":"Contactor relay, 4 NO, 24 V DC, with integrated diode, Size S00, Spring-type terminal upright mounting position","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 DIN rail","Full-Scale Value":"1.1","Mounting Position":"standing, on horizontal mounting surface","Size Of Contactor":"S00","Solid Or Stranded":"2x (0,5 ... 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","Design Of The Surge Suppressor":"diode","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","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","for AWG cables for auxiliary contacts":"2x (20 ... 12)","reference code according to IEC 81346-2":"K","Finely Stranded With Core End Processing":"2x (0.5 ... 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 %","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","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":"spring-loaded 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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/86a79762df695d9f247cd7aa13caadee.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=646426&mlfb=3RH2140-2FB40-1AA0"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RH2140-2FB40-1AA0?","answer":"This part is sourced to order against your BOM quantity through independent distribution. Submit an RFQ for current pricing and availability confirmation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2140-2FB40-1AA0","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/3RH2140-2FB40-1AA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}