{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1026-1BW40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1026-1BW40","canonicalUrl":"https://aoctrl.com/siemens/3RT1026-1BW40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1026-1BW40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, Size S0, 48 V DC coil, screw-type terminals, 11 kW at 400 V AC-2/AC-3, 45 mm width, IP20 front.","salesMarkdown":"It carries a 48 V DC coil and is rated for 11 kW at 400 V in both AC-2 and AC-3 duty classes, meaning it handles slip-ring motors (AC-2) and standard squirrel-cage motors (AC-3) up to that power. For AC-4 duty — plugging and inching — the rated operational current is 15.5 A at 400 V. Front protection is IP20, terminal area is IP00 — so the panel enclosure provides the environmental seal. ## Coil and auxiliary circuit Rated control supply voltage is 48 V DC. The contactor includes an instantaneous auxiliary contact (N/O). For the main circuit, screw-type terminals accept 2x (1 to 2.5 mm²) stranded or 2x (0.5 to 1.5 mm²) solid, with a maximum of 2x 10 mm². ## Short-circuit coordination For Type 2 coordination (contactor remains operational after a fault), the fuse is gL/gG 35 A. This is the spec the panel designer needs for the SCCR declaration.","metaTitle":"Siemens 3RT1026-1BW40 SIRIUS Power Contactor, Size S0, 48 VD","metaDescription":"Siemens 3RT1026-1BW40 SIRIUS power contactor, Size S0, 48 VDC coil, 11 kW at 400 V AC-2/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 (0.5 ... 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":"48 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":"$86.41","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=386677&mlfb=3RT1026-1BW40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1026-1BW40/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RT1026-1BW40?","answer":"The 3RT1023-1AL20 is a Size S0 contactor with a similar AC-3 power rating but uses a 24 V AC/DC coil instead of the 48 V DC coil on this part. The 3RT1026-1AB00 shares the same 48 V DC coil but is a 4-pole configuration. Neither is a drop-in without verifying the coil voltage or pole count against your BOM."},{"question":"Where can I buy 3RT1026-1BW40?","answer":"Sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for your quantity and delivery window."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1026-1BW40","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/3RT1026-1BW40 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}}