{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1026-1BG40-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1026-1BG40-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1026-1BG40-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1026-1BG40-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1026-1BG40-1AA0, size S0 power contactor, 11 kW at 500/690 V AC-3, 15.5 A AC-4, screw-type terminals, 45 mm width.","salesMarkdown":"For reversing or plugging duty (AC-4), it carries 15.5 A at 400 V — the rating that governs contact life under high electrical stress, not the AC-3 figure. The main circuit uses screw-type terminals accepting 2x (1 to 2.5 mm²) stranded, 2x (2.5 to 6 mm²), or a single 10 mm² conductor. Auxiliary contacts accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid, with a max of 2x (0.75 to 4 mm²). This wire range covers standard motor leads and control wiring without adapters. The 35 A limit is the one to design around if the panel must survive a fault without component replacement. Pollution degree 3 (conductive or dry non-conductive pollution) suits it for industrial environments where humidity and dust are present. ## Coil and auxiliary contact ratings The DC magnet coil draws 5.4 W during both closing and holding — no power reduction after pick-up, so the control transformer must supply continuous 5.4 W per contactor. Auxiliary contacts are rated across multiple voltages: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 0.3 A at 220 V DC. The 24 V DC rating (10 A) is the one to use for PLC output interfacing. ## Environmental limits Maximum installation altitude is 2 000 m above sea level.","metaTitle":"Siemens 3RT1026-1BG40-1AA0 SIRIUS S0 Power Contactor, 11 kW","metaDescription":"Siemens SIRIUS 3RT1026-1BG40-1AA0 power contactor, size S0. 11 kW at 500/690 V AC-3, 15.5 A AC-4. Screw terminals, 45 mm width. Current production. Sourced to order.","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":"85 mm","Maximum":"2 000 m","At The Side":"6 mm","Rated Value":"125 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":"0","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 (0.5 ... 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=436932&mlfb=3RT1026-1BG40-1AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1026-1BG40-1AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the physical size and mounting?","answer":"It is a size S0 frame, 45 mm wide, 85 mm high, and 101 mm deep. It mounts via screw or snap-on onto a 35 mm DIN rail per DIN EN 50022."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1026-1BG40-1AA0","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/3RT1026-1BG40-1AA0 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}}