{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1026-3XF40-0LA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1026-3XF40-0LA2","canonicalUrl":"https://aoctrl.com/siemens/3RT1026-3XF40-0LA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1026-3XF40-0LA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, S0 size, 110 VDC coil with varistor surge suppression, screw terminals, 45 mm width.","salesMarkdown":"It carries a 110 VDC coil with an integrated varistor surge suppressor, and is rated for AC-4 duty at 15.5 A at 400 V — the figure that governs reversing or plug-stop applications where the contactor makes and breaks stalled-rotor current. ## Switching capacity and coil The 110 VDC coil pulls in at 70 % of rated voltage (77 V) and drops out below that threshold. Switching capacity varies by voltage: at 110 VDC it handles 1 A, at 220 VDC 0.3 A, and at 24 VDC 10 A — the DC load curve drops sharply with voltage, so verify the load's make/break current against the table. For AC motor duty, the AC-4 rating at 400 V is 15.5 A, which covers reversing or inching applications on motors up to roughly 7.5 kW.","metaTitle":"Siemens 3RT1026-3XF40-0LA2 SIRIUS Power Contactor, 110 VDC C","metaDescription":"Siemens SIRIUS power contactor 3RT1026-3XF40-0LA2, 110 VDC coil, S0 frame, AC-4 15.5 A at 400 V. Current production. Sourced to order against RFQ.","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":"119 mm","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","At The Side":"10 mm","Rated Value":"110 V","Initial Value":"0.7","Type Of Voltage":"DC","lifecycle_stage":"current","During Operation":"-40 ... +70 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Full-Scale Value":"1.25","Size Of Contactor":"S0","Solid Or Stranded":"2x (1 ... 2,5 mm²), 2x (2,5 ... 6 mm²), max. 2x 10 mm²","Product Brand Name":"SIRIUS","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":"3 hp","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","at 110/120 V rated value":"2 hp","at 200/208 V rated value":"7.5 hp","at 220/230 V rated value":"7.5 hp","at 460/480 V rated value":"15 hp","at 575/600 V rated value":"20 hp","Of Main Circuit Rated Value":"6 kV","at AC-4 at 400 V rated value":"15.5 A","Substance Prohibitance (Date)":"01.05.2012 00:00:00","Design Of The Surge Suppressor":"with varistor","at AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 10), 1x 8","Of Auxiliary Circuit Rated Value":"6 kV","For Auxiliary And Control Circuit":"spring-loaded terminals","Function Module For Communication":"No","Product Function Bus Communication":"No","With Type Of Assignment 2 Required":"fuse gL/gG: 35 A","closing power of magnet coil at DC":"6 W","holding power of magnet coil at DC":"5.4 W","reference code acc. to IEC 81346-2":"Q","With Type Of Coordination 1 Required":"fuse gL/gG: 100 A","at AWG cables for auxiliary contacts":"2x (24 ... 14)","operational current at AC-12 maximum":"10 A","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","Product Function Short Circuit Protection":"No","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","number of NC contacts for auxiliary contacts":"2","number of NO contacts for auxiliary contacts":"2","Type Of Voltage Of The Control Supply Voltage":"DC","touch protection on the front acc. to IEC 60529":"finger-safe, for vertical contact from the front","protection class IP on the front acc. to IEC 60529":"IP20","Of Main Circuit With Degree Of Pollution 3 Rated Value":"690 V","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","Of Auxiliary Circuit With Degree Of Pollution 3 Rated Value":"690 V","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","Of The Contactor With Added Electronically Optimized 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=364252&mlfb=3RT1026-3XF40-0LA2","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1026-3XF40-0LA2/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1026-3XF40-0LA2 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What is the AC-4 rating of this contactor?","answer":"The AC-4 rating at 400 V is 15.5 A, which governs reversing or plug-stop duty where the contactor switches stalled-rotor current."},{"question":"Does this contactor have a built-in surge suppressor?","answer":"Yes, the design includes a varistor surge suppressor across the coil."},{"question":"What compliance documentation is available for 3RT1026-3XF40-0LA2?","answer":"The part is RoHS-compliant per the substance prohibition date of 01.05.2012."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1026-3XF40-0LA2","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/3RT1026-3XF40-0LA2 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}}