{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1035-3AK60","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1035-3AK60","canonicalUrl":"https://aoctrl.com/siemens/3RT1035-3AK60","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1035-3AK60","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S2, 3RT1035-3AK60, 18.5 kW at 400 V AC-2, screw-type terminals, snap-on DIN rail mount.","salesMarkdown":"It delivers 18.5 kW in AC-2 duty at 400 V, meaning it handles wound-rotor or slip-ring motor starting where the contactor opens under load — a heavier duty cycle than AC-3. At 500 V it's rated 22 kW, and at 690 V it drops to 11.4 kW, so the voltage derating matters if you're running a 690 V line. Dimensions are 55 mm wide, 112 mm high, 115 mm deep. ## Terminals and wiring Main circuit terminals are screw-type, accepting 2x (0.75...25 mm²) stranded or 2x (0.25...2.5 mm²) solid. That's enough for the full rated current without piggyback lugs. Auxiliary contacts are rated at 24 V / 10 A, 60 V / 2 A, 110 V / 1 A, 220 V / 0.3 A, 230 V / 6 A, and 400 V / 3 A — check your control voltage against the curve; the 230 V rating at 6 A is the one most often used for PLC outputs driving the coil. ## Coil and operating characteristics Coil is rated for 50 Hz at 110 V and 60 Hz at 120 V. The operating range factor is 0.8 to 1.1 of rated voltage at both 50 and 60 Hz, so the coil holds in down to 88 V on a 110 V line and picks up reliably.","metaTitle":"Siemens 3RT1035-3AK60 SIRIUS Power Contactor, 18.5 kW AC-2","metaDescription":"Siemens 3RT1035-3AK60 SIRIUS power contactor, size S2, 18.5 kW at 400 V AC-2, 22 kW at 500 V. Screw terminals, DIN rail mount. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"115 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"55 mm","at AC":"7 ... 20 ms","Height":"112 mm","Stranded":"2x (0.75 ... 25 mm²)","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.8 ... 1.1","Arcing Time":"10 ... 15 ms","On The Front":"IP20","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","During Storage":"-55 ... +80 °C","Of The Terminal":"IP00","at AC-1 maximum":"1 200 1/h","at AC-2 maximum":"600 1/h","at AC-3 maximum":"1 000 1/h","at AC-4 maximum":"300 1/h","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Size Of Contactor":"S2","Solid Or Stranded":"2x (0.75 ... 16 mm²)","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"power contactor","at 24 V rated value":"10 A","at 60 V rated value":"2 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.3 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 50 Hz rated value":"110 V","at 500 V rated value":"22 kW","at 60 Hz rated value":"120 V","at 690 V rated value":"11.4 kW","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"18.5 kW","at AC-4 at 400 V rated value":"35 A","Substance Prohibitance (Date)":"05/01/2012","at 40 °C minimum permissible":"16 mm²","at 60 °C minimum permissible":"16 mm²","Insulation Voltage Rated Value":"690 V","at 230 V at 60 °C rated value":"22 kW","at 690 V at 60 °C rated value":"66 kW","at AWG cables for main contacts":"2x (18 ... 2)","For Auxiliary And Control Circuit":"spring-loaded terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 63 A","Surge Voltage Resistance Rated Value":"6 kV","With Type Of Coordination 1 Required":"fuse gL/gG: 125 A","at AWG cables for auxiliary contacts":"2x (24 ... 14)","operational current at AC-12 maximum":"10 A","number of NC contacts for main contacts":"0","number of NO contacts for main contacts":"3","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Thermal Short-Time Current Limited To 10 S":"400 A","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","apparent holding power of magnet coil at AC":"12.6 VA","apparent pick-up power of magnet coil at AC":"166 VA","Type Of Voltage Of The Control Supply Voltage":"AC","Required Spacing For Grounded Parts At The Side":"6 mm","contact rating of auxiliary contacts according to UL":"A600 / Q600","Inductive Power Factor With Closing Power Of The Coil":"0.71","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.37","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","number of NC contacts for auxiliary contacts instantaneous contact":"0","number of NO contacts for auxiliary contacts instantaneous contact":"0","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000"}},"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=452925&mlfb=3RT1035-3AK60","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1035-3AK60/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 3RT1035-3AK60 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is the closest functional alternative to the 3RT1035-3AK60?","answer":"The 3RT5035-1AH00 is a similar SIRIUS contactor in the same size S2 frame, but it uses spring-cage terminals instead of screw terminals. If your panel is wired for screw terminals, the 3RT1035-3AK60 drops in without rewiring; the 3RT5035-1AH00 would require changing terminal hardware."},{"question":"What wire sizes does the 3RT1035-3AK60 accept?","answer":"Main circuit screw terminals accept 2x (0.75...25 mm²) stranded or 2x (0.25...2.5 mm²) solid conductors."},{"question":"Will the 3RT1035-3AK60 fit a panel designed for the 3RT5035-1AH00?","answer":"Yes, both are size S2 with the same DIN rail footprint and side-by-side mounting capability. The only difference is terminal type — screw vs. spring-cage — so the panel cutouts and rail spacing are identical."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1035-3AK60","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/3RT1035-3AK60 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}}