{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1026-3AF00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1026-3AF00","canonicalUrl":"https://aoctrl.com/siemens/3RT1026-3AF00","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1026-3AF00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, Size S0 power contactor, 3RT1026-3AF00, 3 NO main contacts, 11 kW at 400 V AC-2, screw-type terminals, 45 mm width, snap-on DIN rail mounting.","salesMarkdown":"The Siemens 3RT1026-3AF00 is a Size S0 SIRIUS power contactor with three normally-open main contacts, rated for motor switching at 11 kW in AC-2 duty at 400 V. That AC-2 rating covers wound-rotor motors where inrush isn't the full locked-rotor spike — think crane hoists or conveyor drives that need smooth acceleration. For the tougher AC-4 plugging/reversing duty, it's good for 15.5 A at 400 V. The screw-type main terminals accept 2x 10 mm² or a single 8 AWG conductor. The 45 mm width and 85 mm height leave room for a side-by-side ganged assembly — Siemens allows it. Keep 6 mm clearance at the sides for heat dissipation. Front-side protection is IP20, so it's safe from accidental finger contact in an enclosed panel; the terminals themselves are IP00, meaning live parts are exposed if the panel door's open. Pollution degree 3 means it's built for the conductive dust and humidity you find in industrial enclosures, not a clean office environment. The coil operates at 50 Hz with a voltage tolerance of 0.8 to 1.1 times the rated value. At 24 V the contactor draws 10 A inrush; at 230 V it's 6 A, and at 400 V it drops to 3 A. For DC control circuits, the 24 V coil pulls 10 A, while the 220 V DC coil pulls 0.3 A. The mechanical life is a typical 10 million operations — that's a lot of cycles before the armature wears. ## Short-circuit coordination That's the one to use if you want the contactor back in service after a short without replacing it. Type 1 coordination allows a 100 A gL/gG fuse — the contactor may be damaged and need replacement, but the fault clears. The difference matters for uptime: Type 2 keeps the line running faster after a short.","metaTitle":"Siemens 3RT1026-3AF00 SIRIUS Power Contactor, 11 kW AC-2, 45","metaDescription":"Siemens SIRIUS 3RT1026-3AF00 power contactor, Size S0, 3 NO main contacts, 11 kW at 400 V AC-2, screw terminals, snap-on DIN rail. Current lifecycle, available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"90 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 The Side":"6 mm","On The Front":"IP20","1 Rated Value":"50 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 690 V rated value":"11 kW","Instantaneous Contact":"0","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":"7.8 V·A","Apparent pick-up power of magnet coil at AC":"61 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":"0.82","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=254805&mlfb=3RT1026-3AF00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1026-3AF00/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RT1026-3AF00?","answer":"The depth is 90 mm. That's the dimension from the DIN rail face to the furthest projection of the contactor body."},{"question":"What wire sizes fit the main terminals?","answer":"The screw terminals accept 2x (0.25 to 2.5 mm²), 2x (2.5 to 6 mm²), or max 2x 10 mm² solid/stranded. In AWG that's 2x (16 to 12), 2x (14 to 10), or 1x 8."},{"question":"Where can I buy 3RT1026-3AF00?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit a request for current availability and pricing."},{"question":"Will 3RT1026-3AF00 drop into a panel designed for 3RT1023-1AL20?","answer":"Both are Size S0 Siemens SIRIUS contactors on the same 45 mm DIN-rail footprint, so the mechanical fit and terminal layout are identical. The difference is in the ratings: the 3RT1026-3AF00 carries an 11 kW AC-2 rating at 400 V, while the 3RT1023-1AL20 is a smaller frame for lighter loads. Check your motor's full-load current and duty cycle before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1026-3AF00","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/3RT1026-3AF00 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}}