{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1026-3AL20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1026-3AL20","canonicalUrl":"https://aoctrl.com/siemens/3RT1026-3AL20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1026-3AL20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1026-3AL20 power contactor, S0 frame size, 11 kW at 400 V AC-3, 24 VDC coil, screw-type terminals, screw and snap-on mounting onto 35 mm DIN rail per EN 50022.","salesMarkdown":"The Siemens SIRIUS 3RT1026-3AL20 is a power contactor in the S0 frame size, rated for 11 kW at 400 V AC-3 (squirrel-cage motor switching). The coil is 24 VDC, so it drops straight into a 24 VDC control circuit without an AC coil rectifier or separate power supply. For the tougher duty cycles — reversing, plugging, inching — the AC-4 rating is 15.5 A at 400 V. That is the current it can break under those high-stress conditions, which is lower than the AC-3 figure because the contactor sees full locked-rotor current each time. That means it clips onto the same DIN rail as the upstream motor circuit breaker or fuse base — no panel drilling, no adapter plate. For a panel builder, Type 2 is the usual target — it keeps the contactor in service after a downstream short, avoiding an unplanned line-down replacement. The 35 A fuse also coordinates with the motor circuit breaker setting for the 11 kW load. The auxiliary contact block is rated for switching at 24 VDC up to 10 A, 60 VDC up to 2 A, 110 VDC up to 1 A, and 220 VDC up to 0.3 A. That DC switching curve matters for PLC inputs or relay loads — the current drops fast as voltage rises because DC arcs are harder to extinguish than AC. If the auxiliary contacts drive a 24 VDC PLC input, the 10 A rating leaves plenty of margin. That is normal for a panel-mounted contactor — the enclosure provides the terminal protection. ## Integration notes Side-by-side mounting is permitted (zero spacing between contactors on the rail). That saves panel width — you can pack multiple S0 contactors at 45 mm pitch without derating, provided the ambient temperature stays within the -25 to +60 °C operating range. At higher densities, check the thermal dissipation: the contactor's own heat plus neighbours can push the internal panel temperature above the 60 °C limit. That is the rated life without electrical load — for motor switching, the electrical life will be lower, depending on the switching frequency and current. For a pump running once per minute, that mechanical figure translates to years of service before the contactor needs replacement.","metaTitle":"Siemens SIRIUS 3RT1026-3AL20 Power Contactor, S0, 11 kW AC-3","metaDescription":"Siemens SIRIUS 3RT1026-3AL20 power contactor, S0 frame, 11 kW at 400 V AC-3, 24 VDC coil, screw terminals, DIN rail mount. Active production. Sourced to order against RFQ.","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","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 400 V rated value":"11 kW","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":"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","With Type Of Assignment 2 Required":"fuse gL/gG: 35 A","operating current at AC-12 maximum":"10 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","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)","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","operating current at AC-15 at 230 V rated value":"6 A","operating current at AC-15 at 400 V rated value":"3 A","Inductive Power Factor With Closing Power Of The Coil":"0.72","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","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","type of connectable conductor cross-sections at AWG conductors for auxiliary contacts":"2x (24 ... 14)"}},"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=117898&mlfb=3RT1026-3AL20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1026-3AL20/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of the 3RT1026-3AL20?","answer":"The depth is 90 mm. Height is 85 mm, width is 45 mm (S0 frame)."},{"question":"What wire sizes does the 3RT1026-3AL20 accept?","answer":"Solid conductors: 2x (0.25...2.5 mm²). Stranded: 2x (1...2.5 mm²), 2x (2.5...6 mm²), max 2x 10 mm². AWG equivalents: 2x (16...12), 2x (14...10), 1x 8."},{"question":"Will the 3RT1026-3AL20 drop into a panel specified for a 3RT1017-1AP01?","answer":"Both are S0 frame size (45 mm wide, same DIN rail mounting), so the physical footprint and rail clip are identical. The wiring terminals are the same screw-type design. However, the 3RT1017-1AP01 is a lower-rated contactor — check that the upstream protection (fuse or breaker) and cable sizing match the 3RT1026-3AL20's 11 kW rating. If the panel was built for a smaller motor load, the wiring may be undersized."},{"question":"What compliance documentation does Siemens provide for the 3RT1026-3AL20?","answer":"The evidence does not list specific compliance certificates (RoHS, REACH, UL, IEC) for this order code. As a current-production SIRIUS contactor, it typically carries CE marking for the European market and UL/CSA certification for North America, but verify the specific declaration of conformity or certificate from the Siemens support portal or your distributor against the RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1026-3AL20","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/3RT1026-3AL20 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}}