{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1026-3AL28-1MA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1026-3AL28-1MA2","canonicalUrl":"https://aoctrl.com/siemens/3RT1026-3AL28-1MA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1026-3AL28-1MA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1026-3AL28-1MA2 power contactor, size S0, screw-type terminals, 230 V 50/60 Hz coil, 11 kW at 400 V AC-2.","salesMarkdown":"The Siemens SIRIUS 3RT1026-3AL28-1MA2 is a size S0 power contactor with a 230 V 50/60 Hz coil, designed for switching motor loads in control panels. Rated for 11 kW at 400 V in AC-2 duty (slip-ring motors) and 15.5 A in AC-4 duty (reversing/inching), this contactor handles the demanding switching cycles of conveyor drives, pumps, and compressors. The three main poles use screw-type terminals accepting up to 2x 10 mm² or 1x 8 AWG, with a solid wire range of 0.25 to 2.5 mm² on the auxiliary contacts. A built-in 3-pole auxiliary contact block provides instantaneous signalling for feedback or interlocking. ## Coil and auxiliary contact ratings The 230 V coil operates at 50 Hz and 60 Hz with an operating factor range of 0.8 to 1.1 at 50 Hz and 0.85 to 1.1 at 60 Hz, meaning it picks up reliably even with a sagging line. The auxiliary contacts are rated for 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V — sufficient for PLC input cards or small relay loads. ## Environmental and coordination specs The front face carries IP20 finger protection; the terminals are IP00 — panel builders must ensure terminal shrouding or enclosure clearance. Compliance documentation typically includes CE, UL, CSA, and IEC 60947-4-1 certification for the SIRIUS series. RoHS and REACH declarations are standard from Siemens for this product family.","metaTitle":"Siemens 3RT1026-3AL28-1MA2 SIRIUS Power Contactor, S0, 11 kW","metaDescription":"Siemens SIRIUS 3RT1026-3AL28-1MA2 power contactor, size S0. 11 kW at 400 V AC-2, 15.5 A AC-4. Screw terminals, 230 V 50/60 Hz coil. Active production. Sourced to order.","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","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":"230 V","at 500 V rated value":"11 kW","at 60 Hz rated value":"230 V","at 690 V rated value":"11 kW","Instantaneous Contact":"3","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","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=221934&mlfb=3RT1026-3AL28-1MA2","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1026-3AL28-1MA2/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for this contactor?","answer":"It is rated for 11 kW at 400 V AC-2 and 15.5 A at 400 V AC-4. The coil is 230 V 50/60 Hz. Main terminals accept up to 2x 10 mm² or 1x 8 AWG. It has 3 auxiliary contacts rated at 10 A at 24 V."},{"question":"What is the physical size and mounting?","answer":"Width is 45 mm, height 85 mm, depth 140 mm. It snaps onto 35 mm DIN rail per EN 50022, and side-by-side mounting is permitted without derating."},{"question":"What short-circuit protection is required?","answer":"For Type 2 coordination (no damage to the contactor after a fault), use a gL/gG fuse rated at 35 A. For Type 1 coordination (contactor may need replacement), a 100 A fuse is allowed."},{"question":"How does this compare to the 3RT1034-1AN60-1AA0?","answer":"The 3RT1034-1AN60-1AA0 is a larger frame size (S2 vs S0) with higher current ratings and a different coil voltage. It will not drop into a panel designed for the S0 3RT1026 without rewiring and a larger DIN footprint. The 3RT1026-3AL28-1MA2 is the correct fit for S0-based designs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1026-3AL28-1MA2","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/3RT1026-3AL28-1MA2 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}}