{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2140-1AU60","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2140-1AU60","canonicalUrl":"https://aoctrl.com/siemens/3RH2140-1AU60","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2140-1AU60","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2140-1AU60 auxiliary contactor, 4 NO instantaneous contacts, S00 frame size, screw and snap-on 35 mm DIN rail mounting, 6 kV rated surge voltage.","salesMarkdown":"It is designed to switch control and signalling circuits in motor starter assemblies and general panel wiring, extending the auxiliary contact count of a main contactor or serving as a standalone interface relay. ## Switching capacity — what the voltage/current table means for your circuit The contactor's thermal current rating is 10 A at 24 V and 230 V, but the allowable switching current drops as voltage rises: 4.7 A at 60 V, 3 A at 110 V, 1.2 A at 220 V, 3 A at 400 V, 2 A at 500 V, 1 A at 690 V, and 0.26 A at 600 V. These are not derating curves — they are the maximum continuous current the contacts can carry at each voltage level, governed by the contact gap and arc-quenching capability. For a 400 V control circuit, for example, the 3 A limit means each NO contact can switch a modest pilot load or PLC input, but not a contactor coil drawing 4 A inrush. Rated surge voltage of 6 kV indicates impulse withstand for environments with transient overvoltages, consistent with pollution degree 3. If you are comparing against the 3RH2140-1BP40 (a common alternate in the same S00 frame), the physical footprint and mounting are identical — same 45 mm width, same 73 mm depth, same DIN-rail clip. The difference is in the contact configuration and coil voltage; the -1AU60 has 4 NO contacts, while the -1BP40 carries a different contact arrangement. For a panel already drilled and wired for the -1BP40, the -1AU60 will drop into the same DIN slot without rewiring the mounting, but the contact wiring plan must match. ## Environmental and integration notes The 30 million mechanical cycles typical life means this auxiliary contactor outlasts most main contactors it accompanies; it is not the wear item in the starter assembly.","metaTitle":"Siemens 3RH2140-1AU60 SIRIUS Auxiliary Contactor, 4 NO Conta","metaDescription":"Siemens 3RH2140-1AU60 SIRIUS auxiliary contactor, 4 NO instantaneous contacts, S00 frame, screw and snap-on 35mm DIN rail mounting. Rated surge voltage 6 kV. Current production. So","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Width":"45 mm","at AC":"4 ... 15 ms","at DC":"10 000 1/h","Height":"57.5 mm","Upwards":"10 mm","Forwards":"10 mm","at 60 Hz":"0.85 ... 1.1","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","2 Rated Value":"60 Hz","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","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 60 Hz rated value":"277 V","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","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 ... 16), 2x (18 ... 14), 2x 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)","with low demand rate according to SN 31920":"40 %","apparent holding power of magnet coil at AC":"5.7 VA","apparent pick-up power of magnet coil at AC":"37 VA","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":"AC","contact rating of auxiliary contacts according to UL":"A600 / Q600","Inductive Power Factor With Closing Power Of The Coil":"0.8","Identification Number And Letter For Switching Elements":"40 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.25","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":"https://cdn.aoctrl.com/5bfa27b7d6fbc0e5b2428601fa27b6ce.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=695061&mlfb=3RH2140-1AU60","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2140-1AU60/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to the 3RH2140-1AU60?","answer":"The 3RH2140-1BP40 is the closest peer in the same SIRIUS S00 frame. Both share the same 45 mm width, 73 mm depth, and DIN-rail mounting. The -1AU60 has 4 NO contacts; the -1BP40 has a different contact arrangement. They are not drop-in replacements without rewiring the control circuit."},{"question":"What are the key dimensions of the 3RH2140-1AU60?","answer":"Width 45 mm, height 57.5 mm, depth 73 mm. It mounts on 35 mm DIN rail with screw or snap-on fastening."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2140-1AU60","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/3RH2140-1AU60 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}}