{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1026-1AC20-0UA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1026-1AC20-0UA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1026-1AC20-0UA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1026-1AC20-0UA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, Size S0, 3RT1026-1AC20-0UA0, 45 mm width, 11 kW AC-2 at 400 V, screw terminals, DIN rail mount.","salesMarkdown":"## SIRIUS 3RT1026-1AC20-0UA0 — Panel Fit & Ratings Rated for AC-2 duty at 11 kW / 400 V, this contactor handles slip-ring motor starting and reversing. Motor ratings extend to 11 kW at both 500 V and 690 V, giving headroom for 480 V or 600 V class systems without derating the power rating. The 50/60 Hz coil (24 V at both frequencies) holds across 0.8...1.1 x Us at 50 Hz and 0.85...1.1 x Us at 60 Hz, so it stays pulled in during brownout conditions down to about 19 V. Auxiliary contact ratings: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V. The 10 A rating at 24 V is the maximum continuous current through the auxiliary contacts — useful for PLC inputs or relay coils in the control circuit. ## Coordination & Protection This matters when sizing upstream protection — a 35 A fuse limit means the MCCB or fuse holder must be selected to that maximum for Type 2 compliance. No additional conformal coating or sealed enclosure is required for typical panel conditions. IP00 at the terminals means terminal covers or additional shrouding are needed if the panel has live parts accessible during maintenance. ## Termination & Wiring Main circuit terminals are screw-type, accepting 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), max 2x (0.75...4 mm²) solid or stranded. For larger conductors: 2x (1...2.5 mm²), 2x (2.5...6 mm²), max 2x 10 mm². AWG equivalents: 2x (16...12), 2x (14...10), 1x 8. The dual-conductor capability per terminal saves rail space when looping power through multiple contactors. Side-by-side mounting is permitted with 6 mm spacing to adjacent devices, allowing dense packing on the DIN rail without derating. Key fit parameters: S0 frame size, 45 mm width, 24 V AC coil, 11 kW AC-2 / 15.5 A AC-4 ratings. Verify coil voltage matches control circuit.","metaTitle":"Siemens 3RT1026-1AC20-0UA0 SIRIUS Power Contactor, S0, 11 kW","metaDescription":"Siemens SIRIUS 3RT1026-1AC20-0UA0 power contactor, Size S0, 45 mm wide, 11 kW AC-2 at 400 V, 15.5 A AC-4. Current lifecycle stage. DIN rail mount. Screw terminals.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"91 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 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":"24 V","at 500 V rated value":"11 kW","at 60 Hz rated value":"24 V","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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"screw-type 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","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=152131&mlfb=3RT1026-1AC20-0UA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1026-1AC20-0UA0/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation is available for this part?","answer":"The part carries IP20 front / IP00 terminal protection, pollution degree 3, and is rated for altitudes up to 2 000 m. It is designed to meet IEC/EN 60947-4-1 standards for contactors. Specific RoHS/REACH/UL declarations should be available from Siemens documentation for the SIRIUS series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1026-1AC20-0UA0","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/3RT1026-1AC20-0UA0 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}}