{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1026-1XF40-0LA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1026-1XF40-0LA2","canonicalUrl":"https://aoctrl.com/siemens/3RT1026-1XF40-0LA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1026-1XF40-0LA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, S0 frame, 110 VDC coil with varistor, screw terminals, 45 mm width, snap-on DIN rail mounting.","salesMarkdown":"## Siemens SIRIUS 3RT1026-1XF40-0LA2 — 110 VDC Power Contactor, S0 Frame The DC coil draws a pickup power of 0.7 per-unit initial value and a holding power of 1.25 per-unit full-scale value, meaning the coil's inrush is lower than its sealed consumption — a characteristic that simplifies DC supply sizing in 24 VDC or 110 VDC control circuits. Rated for AC-4 duty at 15.5 A at 400 V, this contactor handles the severe switching conditions of plugging and inching motor loads, not just steady-state running. ## Panel Integration & Wiring Main circuit terminals accept screw-type connections: solid conductors 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), max. 2x (0.75...4 mm²). Auxiliary/control circuit terminals accept 2x (1...2.5 mm²) solid or stranded, max. 2x 10 mm². Side-by-side mounting is permitted, which saves rail space when grouping multiple contactors. ## Switching Capacity & Motor Ratings The main contact rated impulse withstand voltage is 6 kV, consistent with standard industrial isolation coordination. Motor horsepower ratings span from 2 hp at 110/120 V up to 20 hp at 575/600 V, covering common North American motor voltages. At 400 V the contactor switches 11 kW motors; at 690 V it also switches 11 kW. DC switching ratings are provided for the auxiliary contacts: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V. These matter when the contactor controls DC solenoids or indicator lamps in the same panel. ## Compliance & Substance Restrictions Standard Siemens SIRIUS documentation includes the declaration of conformity and the CE mark; specific UL or IEC certification files are available on request.","metaTitle":"Siemens 3RT1026-1XF40-0LA2 SIRIUS Power Contactor, 110 VDC,","metaDescription":"Siemens SIRIUS 3RT1026-1XF40-0LA2 power contactor, 110 VDC coil, S0 frame, AC-4 15.5 A at 400 V. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"101 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"45 mm","Height":"116 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)":"05/01/2012","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":"screw-type 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","With Type Of Coordination 1 Required":"fuse gL/gG: 100 A","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","operational current at AC-12 maximum":"10 A","number of NO contacts for main contacts":"3","reference code according to IEC 81346-2":"Q","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","Product Function Short Circuit Protection":"No","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","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=161801&mlfb=3RT1026-1XF40-0LA2","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1026-1XF40-0LA2/alternatives.json"},"ai":{"faq":[{"question":"What is the coil voltage and type for 3RT1026-1XF40-0LA2?","answer":"The coil is rated 110 VDC, with an integrated varistor surge suppressor."},{"question":"What are the mounting dimensions and clearances for this contactor?","answer":"Width 45 mm, depth 101 mm, height 116 mm. Requires 10 mm clearance upwards, forwards, downwards, and at the side. Mounts on 35 mm DIN rail per DIN EN 50022."},{"question":"What is the AC-4 current rating of 3RT1026-1XF40-0LA2?","answer":"Rated 15.5 A at 400 V for AC-4 duty, covering plugging and inching motor loads."},{"question":"Where can I buy 3RT1026-1XF40-0LA2 and how is it quoted?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1026-1XF40-0LA2","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/3RT1026-1XF40-0LA2 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}}