{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1035-1AC24","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1035-1AC24","canonicalUrl":"https://aoctrl.com/siemens/3RT1035-1AC24","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1035-1AC24","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1035-1AC24, size S2, 24 V AC 50/60 Hz coil, screw terminals, 18.5 kW at 400 V AC-2, 55 x 112 x 164 mm, DIN rail mount.","salesMarkdown":"It carries an AC-2 rating of 18.5 kW at 400 V, which covers slip-ring motor duty where starting current and switching frequency are moderate — common on crane drives, hoists, and some mill auxiliaries. The coil is 24 V AC, rated at both 50 Hz and 60 Hz, with an operating range of 0.8 to 1.1 times rated voltage at 50 Hz and 0.85 to 1.1 at 60 Hz, so it holds in through the dips you see on a loaded line. The 55 mm width and 112 mm height fit a standard S2 footprint; depth is 164 mm, which matters when you are laying out gland plates or enclosure depth against a backpanel. ## Terminal wiring and environmental limits Main circuit terminals are screw-type, accepting solid conductors from 2x 0.5 to 4 mm² and stranded from 2x 0.75 to 25 mm². That stranded range covers most power feeds up to 4 AWG, so you are not fighting undersized terminals on a 20 A motor circuit. The enclosure is IP20 on the front (finger-safe when panel door is closed) and IP00 at the terminals — bare metal inside the cabinet, which is normal for a panel-mounted contactor. Operating temperature range is -25 to +60 °C, storage -55 to +80 °C; the upper operating limit of 60 °C is adequate for most ventilated enclosures, but if this sits near a furnace zone or unvented cabinet, you will want to check the thermal curve for AC-3 duty cycles.","metaTitle":"Siemens 3RT1035-1AC24 SIRIUS Power Contactor, 24 V AC Coil,","metaDescription":"Siemens 3RT1035-1AC24 SIRIUS power contactor, size S2, 24 V AC 50/60 Hz coil, 18.5 kW at 400 V AC-2. Screw terminals, DIN rail mount. Current lifecycle stage. Sourced to order agai","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"164 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 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":"0.85 ... 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":"24 V","at 500 V rated value":"22 kW","at 60 Hz rated value":"24 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":"screw-type 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 (20 ... 16), 2x (18 ... 14), 1x 12","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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 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 (0.75 ... 16 mm²)","apparent holding power of magnet coil at AC":"15 VA","apparent pick-up power of magnet coil at AC":"170 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":"0.76","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.35","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":"2","number of NO contacts for auxiliary contacts instantaneous contact":"2","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=536402&mlfb=3RT1035-1AC24","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1035-1AC24/alternatives.json"},"ai":{"faq":[{"question":"What is the 3RT1035-1AC24 used for?","answer":"It is a SIRIUS power contactor rated for switching motor loads, particularly slip-ring motors under AC-2 duty (18.5 kW at 400 V), as well as resistive loads under AC-1. It is suited for control panels in industrial automation, material handling, and mill auxiliary drives."},{"question":"Where can I buy the 3RT1035-1AC24?","answer":"The 3RT1035-1AC24 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What are the key ratings of the 3RT1035-1AC24?","answer":"Key ratings include 18.5 kW at 400 V AC-2, a 24 V AC coil rated at 50/60 Hz, operating range of 0.8 to 1.1 times rated voltage at 50 Hz, screw terminals accepting stranded wire up to 25 mm², and an operating temperature range of -25 to +60 °C."},{"question":"Will the 3RT1035-1AC24 drop into a panel specified for a 3RT1044-1FB46?","answer":"The 3RT1035-1AC24 is a size S2 contactor with a 55 mm width, while the 3RT1044-1FB46 is a different frame size. They are not direct drop-in replacements; you would need to verify panel cutout dimensions, terminal layouts, and coil voltage compatibility before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1035-1AC24","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/3RT1035-1AC24 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}}