{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1026-3BD40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1026-3BD40","canonicalUrl":"https://aoctrl.com/siemens/3RT1026-3BD40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1026-3BD40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1026-3BD40 power contactor, size S0, 11 kW AC-2 at 400 V, 15.5 A AC-4, screw-type main terminals, spring-loaded aux/control terminals, IP20 front, 45 mm width, snap-on DIN rail.","salesMarkdown":"The Siemens 3RT1026-3BD40 is a SIRIUS power contactor in frame size S0, rated for motor switching at 11 kW under AC-2 duty at 400 V and 15.5 A under AC-4 inching duty at 400 V. The AC-2 11 kW at 400 V rating covers slip-ring motor starting where the contactor opens under load at reduced current — typical for crane or hoist applications. Type 2 coordination is met with a 35 A gL/gG fuse upstream, meaning the contactor remains usable after a short-circuit fault — no welded contacts, minimal downtime. For Type 1 coordination (replace after fault), a 100 A gL/gG fuse suffices. Main power circuit uses screw-type terminals accepting 2x (0.25...2.5 mm²) solid or 2x (1...2.5 mm²) stranded, up to 2x 10 mm² max. Auxiliary and control circuits use spring-loaded terminals (2x 0.25...2.5 mm² solid, 2x 24...14 AWG) — no screw tightening needed on the aux side, which speeds panel wiring.","metaTitle":"Siemens 3RT1026-3BD40 SIRIUS Power Contactor, S0, 11 kW AC-2","metaDescription":"Siemens 3RT1026-3BD40 SIRIUS power contactor, size S0, 11 kW at AC-2 400 V, 15.5 A AC-4, screw/spring terminals, IP20 front, active production. RFQ for BOM fit.","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":"85 mm","Rated Value":"42 V","On The Front":"IP20","Initial Value":"0.8","Of The Terminal":"IP00","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Full-Scale Value":"1.1","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","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","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"11 kW","at AC-4 at 400 V rated value":"15.5 A","Substance Prohibitance (Date)":"01.07.2006 00:00:00","at AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 10), 1x 8","For Auxiliary And Control Circuit":"spring-loaded terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 35 A","closing power of magnet coil at DC":"5.4 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 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)","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Type Of Voltage Of The Control Supply Voltage":"DC","Required Spacing For Grounded Parts At The Side":"6 mm","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","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","number of NC contacts for auxiliary contacts instantaneous contact":"0","number of NO contacts for auxiliary contacts instantaneous contact":"0","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=214212&mlfb=3RT1026-3BD40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1026-3BD40/alternatives.json"},"ai":{"faq":[{"question":"What are the key motor ratings for this contactor?","answer":"It is rated 11 kW at AC-2 duty at 400 V (slip-ring motor starting) and 15.5 A at AC-4 duty at 400 V (inching/plugging)."},{"question":"What coordination fusing is required?","answer":"Type 2 coordination requires a 35 A gL/gG fuse; Type 1 coordination allows a 100 A gL/gG fuse upstream."},{"question":"What is the mounting and terminal type?","answer":"It snap-mounts onto 35 mm DIN rail per EN 50022. Main terminals are screw-type; auxiliary and control terminals are spring-loaded."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1026-3BD40","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/3RT1026-3BD40 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}}