{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1035-3AC20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1035-3AC20","canonicalUrl":"https://aoctrl.com/siemens/3RT1035-3AC20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1035-3AC20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S2, 3RT1035-3AC20, 22 kW at 500 V AC-3, 55 mm width, screw terminals, IP20 front, snap-on DIN rail.","salesMarkdown":"## Integrator's note on the 3RT1035-3AC20 The Siemens 3RT1035-3AC20 is a SIRIUS power contactor in size S2, rated 22 kW at 500 V AC-3 and 18.5 kW at 400 V AC-2. That AC-3 figure governs motor switching up to that load — the contactor is sized for a 22 kW induction motor on a 500 V line, or 18.5 kW at 400 V. The 55 mm width and 115 mm depth fit a standard DIN-rail enclosure; screw terminals accept 2x (0.75... 25 mm²) stranded on the main circuit. IP20 on the front, IP00 at the terminals — the terminal area must be inside the panel, not exposed. Side-by-side mounting is allowed, so no derating for zero-gap spacing in a multi-contactor group. The screw-type terminals on the main circuit accept 2x (0.75... 25 mm²) stranded or 2x (0.25... 2.5 mm²) solid — plan ferrule sizing for the stranded range. Coil terminals are 24 V at 50/60 Hz, so the control transformer must match that voltage. ## Switching performance and thermal limits Maximum operating rate varies by duty: 1 200 cycles/hour in AC-1 (resistive), 1 000 in AC-3 (motor), 600 in AC-2, and 300 in AC-4 (plugging/inching). The AC-4 limit is the binding constraint for reversing or jogging applications — plan the control sequence to stay under 300 ops/h. Storage temperature spans –55 to +80 °C, operating –25 to +60 °C — the storage range is wider because the contactor is not under load.","metaTitle":"Siemens 3RT1035-3AC20 SIRIUS Power Contactor, 22 kW at 500 V","metaDescription":"Siemens 3RT1035-3AC20 SIRIUS power contactor, 22 kW at 500 V AC-3, 55 mm width, screw terminals, IP20 front. Current production. Sourced 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":"0.85 ... 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":"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":"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=397782&mlfb=3RT1035-3AC20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1035-3AC20/alternatives.json"},"ai":{"faq":[{"question":"Will 3RT1035-3AC20 drop into a panel specified around 3RT1026-1AB00?","answer":"No — the 3RT1035-3AC20 is size S2 (55 mm wide, 115 mm deep) versus the smaller S0 frame of the 3RT1026-1AB00. The DIN rail footprint differs, and the terminal wiring ranges are not identical. A panel re-layout is required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1035-3AC20","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/3RT1035-3AC20 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}}