{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1026-3EG28-0MA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1026-3EG28-0MA3","canonicalUrl":"https://aoctrl.com/siemens/3RT1026-3EG28-0MA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1026-3EG28-0MA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1026-3EG28-0MA3 power contactor, S0 frame size, 11 kW AC-2 at 400 V, 15.5 A AC-4, screw-type terminals, built-in RC surge suppressor.","salesMarkdown":"It carries an AC-2 rating of 11 kW at 400 V — that's the slip-ring motor duty where starting current and switching frequency are moderate, so it fits applications like conveyors, pumps, and compressors that don't need heavy inching. The built-in RC surge suppressor means you don't need to order a separate varistor or snubber for coil suppression on standard AC control voltages. ## Ratings that matter for fit The AC-4 rating (15.5 A at 400 V) is the one to check if your application does frequent reversing or inching — that's where the contactor sees arcing on every break, so the current limit is lower than the AC-3 or AC-2 numbers. Short-circuit protection requires a gL/gG fuse rated at 35 A for type 2 coordination.","metaTitle":"Siemens 3RT1026-3EG28-0MA3 SIRIUS Power Contactor, S0, 11 kW","metaDescription":"Siemens SIRIUS 3RT1026-3EG28-0MA3 power contactor, S0 frame, 11 kW AC-2 at 400 V, 15.5 A AC-4, screw terminals, RC suppressor, current lifecycle stage. Sourced to order against RFQ","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":"88 mm","Maximum":"2 000 m","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","At The Side":"6 mm","On The Front":"IP20","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","Mounting type":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Of The Terminal":"IP00","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Size of contactor":"S0","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","Instantaneous Contact":"2","Side-by-side mounting":"Yes","For Main Current Circuit":"screw-type terminals","Single Or Multi-Stranded":"2x (1 ... 2,5 mm²), 2x (2,5 ... 6 mm²), max. 2x 10 mm²","at AC-2 at 400 V rated value":"11 kW","at AC-4 at 400 V rated value":"15.5 A","Design of the surge suppressor":"with RC elements","Operating current at AC-12 maximum":"10 A","With Type Of Assignment 2 Required":"fuse gL/gG: 35 A","at AWG conductors for main contacts":"2x (16 ... 12), 2x (14 ... 10), 1x 8","With Type Of Coordination 1 Required":"fuse gL/gG: 100 A","Reference code acc. to DIN EN 81346-2":"Q","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","at AWG conductors for auxiliary contacts":"2x (24 ... 14)","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"spring-loaded terminals","at ambient temperature 40 °C rated value":"40 A","Apparent holding power of magnet coil at AC":"8.4 V·A","Apparent pick-up power of magnet coil at AC":"64 V·A","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Type of voltage of the control supply voltage":"AC","Inductive power factor with closing power of the coil":"0.72","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","Of The Contactor With Added Electronics-Compatible 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=247870&mlfb=3RT1026-3EG28-0MA3","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1026-3EG28-0MA3/alternatives.json"},"ai":{"faq":[{"question":"What are the key motor ratings for this contactor?","answer":"AC-2 duty at 400 V is 11 kW; AC-4 duty at 400 V is 15.5 A. The AC-2 rating governs normal start-run motor switching; the AC-4 rating governs reversing or inching cycles."},{"question":"What short-circuit protection does it require?","answer":"For type 2 coordination, a gL/gG fuse rated at 35 A is specified."},{"question":"Does it include a surge suppressor?","answer":"Yes, it comes with a built-in RC surge suppressor across the coil."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1026-3EG28-0MA3","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/3RT1026-3EG28-0MA3 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}}