{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1026-8BB45-1PB2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1026-8BB45-1PB2","canonicalUrl":"https://aoctrl.com/siemens/3RT1026-8BB45-1PB2","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1026-8BB45-1PB2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 24 VDC coil, S0 size, screw terminals, 11 kW at 400 V AC-3, 55 x 85 x 101 mm.","salesMarkdown":"The S0 frame keeps the footprint compact at 55 mm wide, 85 mm tall, and 101 mm deep — a direct fit into most distribution or motor-control enclosures without extra spacing. The 11 kW rating at 400 V AC-3 is the headline motor-switching figure — it tells you the contactor can start and stop a 400 V three-phase induction motor up to that shaft power. The AC-4 rating of 15.5 A at 400 V is the one to watch for plugging or jogging duty; if your application cycles the contactor under load, that 15.5 A limit governs, not the AC-3 kW number. The coil draws 5.4 W both on closing and holding, which is a constant DC load on the 24 V supply — no surge beyond the pick-up power. The front face carries IP20 finger protection; the terminals themselves are IP00, meaning the wiring compartment expects enclosure protection from the panel. If you are evaluating a panel originally built around the smaller 3RT1015-1BB42, the S0 frame of this contactor is physically larger — 55 mm wide versus the S00 frame's 45 mm — so verify DIN-rail space and terminal clearance before assuming a drop-in swap. The screw terminals accept up to 2x 10 mm² or 1x 8 AWG for the main circuit, which covers most motor feeds up to the 11 kW rating.","metaTitle":"Siemens 3RT1026-8BB45-1PB2 SIRIUS Power Contactor, 24 VDC, S","metaDescription":"Siemens SIRIUS 3RT1026-8BB45-1PB2 power contactor, 24 VDC coil, S0 size, 11 kW at 400 V AC-3. 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 (0.25 ... 2.5 mm²)","Width":"55 mm","Height":"85 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":"1","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","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 (0.25 ... 1.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (24 ... 14)","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"spring-loaded terminals","at ambient temperature 40 °C rated value":"40 A","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","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=57082&mlfb=3RT1026-8BB45-1PB2","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1026-8BB45-1PB2/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for this contactor?","answer":"The headline ratings are 11 kW at 400 V AC-3 for motor starting, 15.5 A at 400 V AC-4 for reversing duty, and a 24 VDC coil drawing 5.4 W. Operating temperature range is -25 to +60 °C."},{"question":"Will this contactor fit a panel designed for the 3RT1015-1BB42?","answer":"Not without checking space. The 3RT1026-8BB45-1PB2 uses the S0 frame (55 mm wide), while the 3RT1015-1BB42 is an S00 frame (45 mm wide). The extra 10 mm width and different terminal layout mean you should verify DIN-rail clearance and wiring access before assuming a direct swap."},{"question":"What wire sizes does the main circuit accept?","answer":"The screw terminals accept 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), or max. 2x 10 mm² solid/stranded, and 2x (16 to 12 AWG), 2x (14 to 10 AWG), or 1x 8 AWG."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1026-8BB45-1PB2","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/3RT1026-8BB45-1PB2 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}}