{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1026-3KF80","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1026-3KF80","canonicalUrl":"https://aoctrl.com/siemens/3RT1026-3KF80","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1026-3KF80","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S0 power contactor, 3RT1026-3KF80, AC-4 15.5 A at 400 V, screw terminals, varistor, snap-on DIN rail.","salesMarkdown":"It carries a 15.5 A AC-4 rating at 400 V, which is the duty cycle for reversing or inching a motor where the contacts make and break under full load. The built-in varistor surge suppressor clamps the coil flyback spike, so you don't need an external snubber on the control wiring. Saves a DIN-rail slot and a wiring step. Side-by-side mounting is allowed, with a 6 mm gap to adjacent devices for cooling. Main circuit terminals are screw-type, accepting 2x (0.25...2.5 mm²) solid or 2x (1...2.5 mm²) stranded, up to 2x 10 mm² max. That's enough for the 15.5 A AC-4 path without piggyback lugs.","metaTitle":"Siemens 3RT1026-3KF80 SIRIUS Power Contactor, S0, 15.5 A AC-","metaDescription":"Siemens 3RT1026-3KF80 SIRIUS S0 power contactor, AC-4 rated 15.5 A at 400 V, varistor suppression, screw terminals, active production, DIN-rail mount.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"100 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45 mm","Height":"88 mm","Maximum":"2 000 m","At The Side":"6 mm","Rated Value":"100 V","On The Front":"IP20","Initial Value":"0.7","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","Full-scale value":"1.25","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 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","Design of the surge suppressor":"with varistor","Closing power of magnet coil at DC":"4.2 W","Holding power of magnet coil at DC":"4.2 W","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","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Type of voltage of the control supply voltage":"DC","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A"}},"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=412024&mlfb=3RT1026-3KF80","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1026-3KF80/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to the 3RT1026-3KF80?","answer":"The 3RT1015-1BB42 is a smaller S0 contactor (AC-3 rated 7 A at 400 V) but shares the same frame and DIN-rail footprint. It will not drop in for the 15.5 A AC-4 duty of the 3RT1026-3KF80 without derating the load. For a direct swap on the same motor circuit, stick with the 3RT1026-3KF80."},{"question":"What is the 3RT1026-3KF80's depth?","answer":"100 mm, measured from the DIN-rail mounting surface to the front of the housing."},{"question":"What solid wire sizes does the 3RT1026-3KF80 accept?","answer":"Main terminals accept 2x (0.25...2.5 mm²) solid conductors per terminal."},{"question":"Will the 3RT1026-3KF80 drop into a panel specified around the 3RT1015-1BB42 without rewiring?","answer":"Mechanically yes — same S0 frame, same 45 mm width, same DIN-rail clip. Electrically no — the 3RT1026-3KF80 draws higher coil power (4.2 W holding) and switches higher current. Verify the control transformer VA and the motor circuit protection before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1026-3KF80","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/3RT1026-3KF80 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}}