{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1026-1BP40-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1026-1BP40-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1026-1BP40-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1026-1BP40-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, Size S0, 3RT1026-1BP40-1AA0, 11 kW at 400 V AC-2, 45 mm wide, screw-type terminals, IP20 front.","salesMarkdown":"## Integrator's brief: what this contactor delivers The Siemens SIRIUS 3RT1026-1BP40-1AA0 is a Size S0 power contactor rated for motor switching at 11 kW in AC-2 duty at 400 V — the standard category for slip-ring motor starting and reversing. For resistive loads (AC-12), it handles up to 10 A continuously. The 45 mm width and 85 mm height keep it within a standard panel layout — three units per 135 mm section. Screw-type terminals on the main circuit accept 2x (0.5 to 1.5 mm²) solid, 2x (0.75 to 2.5 mm²) stranded, or up to 2x 4 mm² max. AWG equivalents are 2x (16 to 12) solid and 1x 8 stranded. Strip and torque per Siemens standard — no special tooling needed beyond a Pozidriv #2. Short-circuit coordination is defined for two assignment types. This matters when you're sizing the upstream protective device — the 35 A limit for Type 2 keeps the contactor reusable after a downstream short. Side-by-side mounting is permitted — no spacing required — which saves rail space in dense panels. ## Coil and control: DC magnet data The DC magnet coil draws 5.4 W during both closing and holding — a constant-power design that simplifies the control transformer sizing. These are the utilization category ratings for the auxiliary contacts, not the main poles. ## Sourcing and lifecycle: current production, quoted to order However, verify the coil voltage and auxiliary contact configuration against the original BOM — the 3RT1026-1BP40-1AA0 carries a DC magnet, while the 3RT1015-1BB42 may differ in coil supply.","metaTitle":"Siemens SIRIUS 3RT1026-1BP40-1AA0 Power Contactor, Size S0,","metaDescription":"Siemens SIRIUS 3RT1026-1BP40-1AA0 power contactor, Size S0, 11 kW at 400 V AC-2, 45 mm wide, screw terminals, IP20 front, current lifecycle stage. 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":"230 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=367163&mlfb=3RT1026-1BP40-1AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1026-1BP40-1AA0/alternatives.json"},"ai":{"faq":[{"question":"What are the key motor ratings for this contactor?","answer":"At 400 V AC-2 duty it is rated for 11 kW motor switching. At 400 V AC-4 duty (plugging/inching) the current rating is 15.5 A. For resistive loads at AC-12, maximum operating current is 10 A."},{"question":"What fuse rating is needed for Type 2 short-circuit coordination?","answer":"Type 2 coordination requires a gL/gG fuse rated 35 A. Type 1 coordination allows a 100 A gL/gG fuse."},{"question":"What is the physical size and mounting of this contactor?","answer":"It is a Size S0 frame, 45 mm wide, 85 mm high, 101 mm deep. Mounts via screw or snap-on onto a 35 mm DIN rail per EN 50022. Side-by-side mounting is permitted without spacing."},{"question":"What wire sizes does the screw terminal accept?","answer":"Solid conductors: 2x (0.5 to 1.5 mm²). Stranded: 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). AWG equivalents: 2x (16 to 12) solid, 2x (14 to 10) stranded, 1x 8 stranded."},{"question":"Will this contactor fit into a panel designed for 3RT1015-1BB42?","answer":"Yes, both are Size S0 frames with the same 45 mm width and DIN rail mounting, so the physical footprint is identical. However, confirm the coil voltage and auxiliary contact arrangement — the 3RT1026-1BP40-1AA0 uses a DC magnet, which may differ from the 3RT1015-1BB42's coil supply."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1026-1BP40-1AA0","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/3RT1026-1BP40-1AA0 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}}