{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1026-1AG20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1026-1AG20","canonicalUrl":"https://aoctrl.com/siemens/3RT1026-1AG20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1026-1AG20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1026-1AG20, size S0, 11 kW at AC-2 400 V, 15.5 A at AC-4 400 V, screw terminals, IP20 front, 45 mm width.","salesMarkdown":"That matches the IP20 front / IP00 terminal enclosure — the terminals are not sealed, so the panel itself must provide the environmental protection. Mechanical endurance is listed at 10,000,000 operating cycles typical. That's the mechanical life of the contactor assembly; electrical life will be lower and depends on the switching current and voltage per the manufacturer's derating curves. Side-by-side mounting is permitted, so no derating for zero-gap spacing. ## Termination and Wiring Main and auxiliary/control circuits use screw-type terminals. The main circuit accepts solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). For stranded or ferruled conductors: 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), max 2x 10 mm². AWG equivalents are 2x (16 to 12), 2x (14 to 10), 1x 8 for the main contacts, and 2x (20 to 16), 2x (18 to 14), 1x 12 for auxiliary contacts. ## Fuse Coordination and Short-Circuit Protection For type 1 coordination (contactor may need replacement after a fault), the fuse can be up to 100 A gL/gG. This gives the panel designer flexibility: use 35 A fuses if you want to avoid replacing the contactor after a rare fault, or use a higher rating if the upstream protection is already set.","metaTitle":"Siemens SIRIUS 3RT1026-1AG20 Power Contactor, S0, 11 kW AC-2","metaDescription":"Siemens SIRIUS 3RT1026-1AG20 power contactor, size S0, 11 kW at AC-2 400 V, 15.5 A at AC-4 400 V. Screw terminals, IP20 front. Active production. RFQ for lead time.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"91 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"45 mm","Height":"85 mm","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","On The Front":"IP20","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","Of The Terminal":"IP00","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":"S0","Solid Or Stranded":"2x (1 ... 2,5 mm²), 2x (2,5 ... 6 mm²), max. 2x 10 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":"11 kW","at 60 Hz rated value":"110 V","at 690 V rated value":"11 kW","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"11 kW","at AC-4 at 400 V rated value":"15.5 A","Substance Prohibitance (Date)":"01.07.2006 00:00:00","at AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 10), 1x 8","For Auxiliary And Control Circuit":"screw-type terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 35 A","reference code acc. to IEC 81346-2":"Q","With Type Of Coordination 1 Required":"fuse gL/gG: 100 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","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)","apparent holding power of magnet coil at AC":"8.4 V·A","apparent pick-up power of magnet coil at AC":"64 V·A","Type Of Voltage Of The Control Supply Voltage":"AC","Required Spacing For Grounded Parts At The Side":"6 mm","Inductive Power Factor With Closing Power Of The Coil":"0.72","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.24","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=421483&mlfb=3RT1026-1AG20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1026-1AG20/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for this contactor?","answer":"The AC-2 rating at 400 V is 11 kW, and the AC-4 rating at 400 V is 15.5 A. The operating temperature range is -25 to +60 °C. Mechanical endurance is 10,000,000 cycles typical."},{"question":"What is the depth of this contactor?","answer":"The depth is 91 mm."},{"question":"What wire sizes does the main circuit accept?","answer":"Solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). Stranded: 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), max 2x 10 mm²."},{"question":"What fuse coordination is required?","answer":"For type 2 coordination, use a 35 A gL/gG fuse. For type 1 coordination, a 100 A gL/gG fuse is permitted."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1026-1AG20","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/3RT1026-1AG20 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}}