{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1035-1AD20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1035-1AD20","canonicalUrl":"https://aoctrl.com/siemens/3RT1035-1AD20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1035-1AD20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1035-1AD20 Size S2 power contactor, screw-type terminals, 22 kW at 500 V AC-3, 55 mm width, DIN rail snap-on mounting.","salesMarkdown":"## SIRIUS Size S2 power contactor — 22 kW at 500 V, screw terminals, DIN rail mount The Siemens 3RT1035-1AD20 is a SIRIUS Size S2 power contactor rated for 22 kW at 500 V in AC-3 duty (switching squirrel-cage motors), with a 400 V AC-3 rating of 18.5 kW. The contactor is 55 mm wide, 112 mm tall, and 115 mm deep — a standard S2 footprint that fits alongside other SIRIUS components on the rail. ## Termination and wiring — screw terminals, solid and stranded ranges Main circuit screw terminals accept solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and up to 2x (0.75 to 4 mm²). Stranded conductors: 2x (0.75 to 25 mm²). For mixed solid/stranded: 2x (0.75 to 16 mm²). These ranges cover most motor and distribution wiring up to 25 mm² stranded. The screw terminal design is field-serviceable with standard screwdrivers — no special tooling needed. Strip lengths and torque values follow standard Siemens SIRIUS practice for the S2 frame. ## Duty ratings and switching frequency — match to your load profile AC-1 (resistive) switching: 1200 operations per hour maximum. AC-2 (slip-ring motors): 600 ops/h. AC-3 (squirrel-cage motors, normal starting): 1000 ops/h. AC-4 (plugging/inching): 300 ops/h. The 10 million mechanical life cycles mean the contactor outlasts most panel designs under normal AC-3 duty. Coil operates on AC supply: 50 Hz at 0.8 to 1.1 times rated voltage, 60 Hz at 0.85 to 1.1. These are standard for the SIRIUS family — predictable for coordination with upstream breakers or fuses.","metaTitle":"Siemens 3RT1035-1AD20 SIRIUS Power Contactor, 22 kW at 500 V","metaDescription":"Siemens SIRIUS 3RT1035-1AD20 Size S2 power contactor. 22 kW at 500 V, AC-3 duty. Screw terminals, 55 mm wide, DIN rail mount. Active production, available to order. Request RFQ for","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":"42 V","at 500 V rated value":"22 kW","at 60 Hz rated value":"42 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=502354&mlfb=3RT1035-1AD20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1035-1AD20/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RT1035-1AD20?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ to get current pricing and availability confirmed at quote time — no stock or price figures are published here."},{"question":"What is 3RT1035-1AD20's listed depth on this component line?","answer":"The listed depth is 115 mm, with a width of 55 mm and height of 112 mm — the standard S2 footprint for SIRIUS contactors."},{"question":"What wire sizes does the 3RT1035-1AD20 accept on the main terminals?","answer":"Screw terminals accept 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). Mixed: 2x (0.75 to 16 mm²)."},{"question":"Will 3RT1035-1AD20 drop into a panel specified around 3RT5035-1AH00 without rewiring?","answer":"The 3RT1035-1AD20 is a Size S2 contactor in the SIRIUS classic family (3RT1), while the 3RT5035-1AH00 is a SIRIUS Innovation (3RT5) with a different accessory interface and coil system. They share the same 55 mm width and DIN rail mounting, but the 3RT5 series uses a different coil connector and auxiliary contact block design. A direct drop-in without rewiring the control circuit is not guaranteed — verify the coil voltage and auxiliary wiring against the 3RT5 panel layout before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1035-1AD20","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/3RT1035-1AD20 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}}