{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1026-1BG44","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1026-1BG44","canonicalUrl":"https://aoctrl.com/siemens/3RT1026-1BG44","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1026-1BG44","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1026-1BG44 power contactor, size S0, 45 mm width, screw-type terminals, AC-4 rated 15.5 A at 400 V, 11 kW motor power at 500 V, DIN rail mount.","salesMarkdown":"For AC-3 duty (normal motor start/stop), it's rated for 11 kW at 500 V and 11 kW at 690 V, covering common three-phase motor sizes across 400-690 V line supplies. The coil draws 5.4 W on DC hold — a continuous-duty coil that stays cool in a sealed enclosure, so no derating needed for the holding power. Main circuit terminals accept screw-type connections: 2x (0.5...1.5 mm²) solid, 2x (0.75...2.5 mm²) stranded, up to 2x 4 mm² max. For AWG, that's 2x (16...12) solid, 2x (14...10) stranded, or 1x 8. At altitudes above 2,000 m, derate the thermal current. ## Sizing and coordination For Type 1 coordination (replace the contactor after a fault), use a 100 A gL/gG fuse. These values govern your branch circuit protection design. The auxiliary contact block has 2 instantaneous contacts (NO/NC configurable).","metaTitle":"Siemens 3RT1026-1BG44 SIRIUS Power Contactor, S0, 45mm, AC-4","metaDescription":"Siemens SIRIUS 3RT1026-1BG44 power contactor, size S0, 45 mm width, screw terminals, AC-4 rated 15.5 A at 400 V, 11 kW at 500 V. Current lifecycle stage. DIN rail mount. Source to","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":"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":"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","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=274557&mlfb=3RT1026-1BG44","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1026-1BG44/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of the 3RT1026-1BG44?","answer":"The depth is 150 mm from the mounting surface to the furthest projection (typically the front cover or auxiliary block). This is the total installed depth you need to allow in the enclosure."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1026-1BG44","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/3RT1026-1BG44 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}}