{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1035-1AN20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1035-1AN20","canonicalUrl":"https://aoctrl.com/siemens/3RT1035-1AN20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1035-1AN20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1035-1AN20, size S2, 22 kW AC-3 at 500 V, 18.5 kW AC-2 at 400 V, screw terminals, 55 mm width, snap-on DIN rail mounting.","salesMarkdown":"## Rating and fit The Siemens 3RT1035-1AN20 is a SIRIUS power contactor in the S2 frame size, rated for 22 kW at 500 V in AC-3 duty — that's the motor-switching rating that governs most conveyor, pump, and fan applications. At 400 V AC-2 it carries 18.5 kW, and at 690 V AC-4 it handles 11.4 kW, covering reversing or inching loads where the contactor makes and breaks under full current. The main circuit uses screw-type terminals, accepting solid conductors from 2x 0.5 to 1.5 mm² up to 2x 0.75 to 4 mm², and stranded up to 2x 25 mm². That covers most panel wiring from control to power feeds without needing lug adapters. Auxiliary contact ratings are specified: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, 6 A at 230 V, and 3 A at 400 V — all at 50/60 Hz. These cover PLC input sensing and relay interlocking in the same panel without a separate auxiliary block. ## Switching frequency and thermal limits Maximum switching frequency depends on duty class: 1 200 operations per hour at AC-1 (resistive), 600 at AC-2, 1 000 at AC-3, and 300 at AC-4. For a typical AC-3 motor start, that's one cycle every 3.6 seconds — fine for most process cycling but not for high-speed jogging. The IP20 front enclosure protects against finger contact, while the terminals themselves are IP00 — meaning the wiring zone is open and must be inside a panel or enclosure. Operating time at AC coil is 7 to 20 ms, arcing time 10 to 15 ms.","metaTitle":"Siemens 3RT1035-1AN20 SIRIUS Power Contactor, 22 kW AC-3","metaDescription":"Siemens 3RT1035-1AN20 SIRIUS power contactor, size S2, 22 kW at 500 V AC-3, 18.5 kW at 400 V AC-2. Screw terminals, 55 mm wide, snap-on DIN rail. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"115 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":"220 V","at 500 V rated value":"22 kW","at 60 Hz rated value":"220 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":"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=178936&mlfb=3RT1035-1AN20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1035-1AN20/alternatives.json"},"ai":{"faq":[{"question":"What are the key motor ratings for this contactor?","answer":"AC-3 duty: 22 kW at 500 V, 50/60 Hz. AC-2 duty: 18.5 kW at 400 V. AC-4 duty: 11.4 kW at 690 V. These are the ratings that determine motor load fit."},{"question":"What is the physical size and mounting method?","answer":"The contactor is 55 mm wide, 112 mm high, and 115 mm deep. It mounts via screw and snap-on onto a 35 mm DIN rail per EN 50022. Side-by-side mounting is allowed without derating."},{"question":"What wire sizes does the screw terminal accept?","answer":"Solid: 2x 0.5 to 1.5 mm², 2x 0.75 to 2.5 mm², max 2x 0.75 to 4 mm². Stranded: 2x 0.75 to 25 mm². Solid or stranded: 2x 0.75 to 16 mm²."},{"question":"What is the switching frequency capability?","answer":"AC-1: 1 200 ops/h, AC-2: 600 ops/h, AC-3: 1 000 ops/h, AC-4: 300 ops/h. Mechanical life is 10 000 000 operations typical."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1035-1AN20","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/3RT1035-1AN20 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}}