{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1026-1DB44","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1026-1DB44","canonicalUrl":"https://aoctrl.com/siemens/3RT1026-1DB44","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1026-1DB44","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1026-1DB44, S0 size, 11 kW at 400 V AC-3, 24 VDC coil with varistor, screw terminals, 45 mm width, current production.","salesMarkdown":"The Siemens 3RT1026-1DB44 is a SIRIUS power contactor in the S0 frame size, rated 11 kW at 400 V AC-3 and also 11 kW at 690 V AC-3 — that is the motor-switching duty class for standard squirrel-cage induction motors. The AC-3 rating is the one that governs real motor loads; the AC-4 rating of 15.5 A at 400 V covers reversing or inching duty where the contacts make and break at full load. The 24 VDC coil draws 5.4 W both on pick-up and hold, so the control transformer and wiring need to support that continuous draw — no extra inrush to size for. A varistor is built in across the coil for surge suppression, which means no external RC snubber is needed on the coil circuit. The S0 footprint is 45 mm wide, 88 mm tall, 150 mm deep. Side-by-side mounting is allowed with a 6 mm air gap to adjacent devices. The main circuit terminals are screw-type accepting 2x (1...2.5 mm²) stranded or 2x (2.5...6 mm²) single-core, up to 2x 10 mm² max. Control terminals accept 2x (0.5...1.5 mm²) solid or 2x (0.75...2.5 mm²) stranded, max 2x 4 mm². The enclosure is IP20 on the front, IP00 at the terminals — so the terminal area is not touch-safe without additional shrouding or panel enclosure. ## Coordination and fusing","metaTitle":"Siemens 3RT1026-1DB44 SIRIUS Power Contactor, 11 kW at 400 V","metaDescription":"Siemens 3RT1026-1DB44 SIRIUS power contactor, 11 kW rated at 400 V AC-3, 24 VDC coil with varistor, screw terminals, S0 size, 45 mm wide, current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"150 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"45 mm","Height":"88 mm","Maximum":"2 000 m","At The Side":"6 mm","Rated Value":"24 V","On The Front":"IP20","Initial Value":"0.8","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","Full-scale value":"1.1","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 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","Instantaneous Contact":"2","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","Design of the surge suppressor":"with varistor","Closing power of magnet coil at DC":"5.4 W","Holding power of magnet coil at DC":"5.4 W","Operating current at AC-12 maximum":"10 A","With Type Of Assignment 2 Required":"fuse gL/gG: 35 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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"screw-type terminals","at ambient temperature 40 °C rated value":"40 A","Type of voltage of the control supply voltage":"DC","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"}},"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=445448&mlfb=3RT1026-1DB44","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1026-1DB44/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to 3RT1026-1DB44?","answer":"The 3RT1023-1AL20 is a smaller S00-frame contactor with a 24 VAC/DC coil and lower motor rating (5.5 kW at 400 V AC-3). It will not drop into the same panel without rewiring because the S0 and S00 frames have different mounting hole patterns and terminal layouts. For a direct S0-frame alternative with a 24 VDC coil, the 3RT1026-1DB44 is the current-production part; no exact second-source exists in the same frame."},{"question":"What compliance documentation does Siemens provide for 3RT1026-1DB44?","answer":"Siemens provides a CE declaration of conformity and the product is designed to meet RoHS and REACH requirements. The part carries a UL/CSA listing (IEC 60947-4-1) as standard for the SIRIUS series. Specific certificates are available on request with an RFQ."},{"question":"Where can I buy 3RT1026-1DB44 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time. Submit an RFQ for a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1026-1DB44","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/3RT1026-1DB44 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}}