{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1026-3BB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1026-3BB40","canonicalUrl":"https://aoctrl.com/siemens/3RT1026-3BB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1026-3BB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S0 power contactor, 3RT1026-3BB40, 24 VDC coil, screw-type main terminals, spring-loaded auxiliary terminals, 11 kW at AC-2 400 V, IP20 front.","salesMarkdown":"It is rated for motor switching at 11 kW in AC-2 duty at 400 V and carries a 15.5 A rated operational current in AC-4 at 400 V. The coil draws 5.4 W closing and holding power. This is a current-production part. AC-2 at 400 V is the duty for slip-ring motor starting and reversing — the 11 kW rating tells you the maximum motor power it can handle under those conditions. AC-4 at 400 V (15.5 A) covers plugging and inching duty, where the contactor sees higher switching stress. For AC-1 resistive loads the contactor is rated 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V. The 24 VDC coil pulls 5.4 W holding power — verify your control transformer sizing if driving multiple contactors. Auxiliary and control circuit terminals are spring-loaded, accepting 2x (0.25…2.5 mm²) solid or 2x (24…14) AWG.","metaTitle":"Siemens 3RT1026-3BB40 SIRIUS Power Contactor, 24 VDC, 11 kW","metaDescription":"Siemens 3RT1026-3BB40 SIRIUS S0 power contactor, 24 VDC coil, 11 kW AC-2 at 400 V. IP20 front, screw-type main terminals, spring-loaded aux. Current lifecycle stage. Sourced to ord","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":"24 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=505188&mlfb=3RT1026-3BB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1026-3BB40/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RT1026-3BB40?","answer":"The 3RT1015-1BB42 is a smaller SIRIUS contactor (S00 frame) with a 24 VDC coil, but it has lower motor ratings — it will not directly replace the S0-frame 3RT1026-3BB40 without verifying the load current and frame size fit."},{"question":"Will 3RT1026-3BB40 drop into a panel specified around 3RT1015-1BB42?","answer":"No. The 3RT1026 is an S0 frame (45 mm wide) while the 3RT1015 is an S00 frame (22.5 mm wide). The wider width and different terminal layout mean the DIN rail footprint and wiring plan must be rechecked."},{"question":"What compliance documentation is available for 3RT1026-3BB40?","answer":"RoHS compliance is documented with a substance prohibition date of 01 July 2006. The contactor is designed to IEC 60947-4-1 and carries the reference code Q per IEC 81346-2."},{"question":"Where can I buy 3RT1026-3BB40 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/3RT1026-3BB40","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/3RT1026-3BB40 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}}