{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1026-3AF04","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1026-3AF04","canonicalUrl":"https://aoctrl.com/siemens/3RT1026-3AF04","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1026-3AF04","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1026-3AF04, size S0 power contactor, 3 NO main contacts, screw-type main terminals, spring-loaded auxiliary terminals, 11 kW at 400 V AC-2, 15.5 A at AC-4.","salesMarkdown":"It carries three normally-open main contacts and is rated for 11 kW at 400 V in AC-2 duty (slip-ring motor starting), and 15.5 A in AC-4 duty (plugging/inching). ## Terminals and wiring Main current circuit uses screw-type terminals accepting 2x (0.25...2.5 mm²) solid, 2x (1...2.5 mm²) or 2x (2.5...6 mm²) stranded, up to 2x 10 mm² max. The auxiliary and control circuit uses spring-loaded terminals (2x 0.25...2.5 mm² solid, 2x 24...14 AWG). The mixed terminal types mean you'll want screwdrivers for the power side and a push-in tool for the aux side — not a big deal on a new build, but worth noting if your panel shop standardizes on one termination method.","metaTitle":"Siemens 3RT1026-3AF04 SIRIUS Power Contactor, S0, 11 kW at 4","metaDescription":"Siemens SIRIUS 3RT1026-3AF04 power contactor, size S0, 3 NO main contacts. Rated 11 kW at 400 V AC-2, 15.5 A at AC-4. Screw-type main terminals, spring-loaded aux terminals. Active","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"140 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45 mm","Height":"85 mm","at 50 Hz":"0.8 ... 1.1","On The Front":"IP20","1 Rated Value":"50 Hz","Of The Terminal":"IP00","lifecycle_stage":"current","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 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":"spring-loaded terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 35 A","reference code acc. to IEC 81346-2":"Q","Ambient Temperature During Operation":"-25 ... +60 °C","With Type Of Coordination 1 Required":"fuse gL/gG: 100 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","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)","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","apparent holding power of magnet coil at AC":"7.8 V·A","apparent pick-up power of magnet coil at AC":"61 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":"0.82","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":"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=396184&mlfb=3RT1026-3AF04","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1026-3AF04/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for this contactor?","answer":"It is rated 11 kW at 400 V AC-2 (slip-ring motor duty) and 15.5 A at AC-4 (plugging/inching). The main contacts are 3 NO. Ambient temperature range is -25 to +60 °C."},{"question":"What is the mounting method and footprint?","answer":"It mounts via screw or snap-on onto 35 mm DIN rail per EN 50022. Dimensions are 45 mm wide, 85 mm tall, 140 mm deep. Side-by-side mounting is allowed."},{"question":"What terminal types does it use?","answer":"Main circuit terminals are screw-type. Auxiliary and control circuit terminals are spring-loaded. Wire sizes range from 0.25 to 10 mm² depending on configuration."},{"question":"What fuse coordination is required?","answer":"Type 2 coordination requires a gL/gG 35 A fuse upstream. Type 1 coordination allows a gL/gG 100 A fuse."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1026-3AF04","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/3RT1026-3AF04 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}}