{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1026-1AC20-ZW97","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1026-1AC20-ZW97","canonicalUrl":"https://aoctrl.com/siemens/3RT1026-1AC20-ZW97","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1026-1AC20-ZW97","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1026-1AC20-ZW97, size S0 power contactor, 24 VAC 50/60 Hz coil, 11 kW at 400 V AC-3, screw terminals, snap-on DIN rail.","salesMarkdown":"The 24 VAC coil accepts both 50 Hz and 60 Hz supplies, with a rated control supply voltage of 24 V at 50 Hz and 24 V at 60 Hz. The headline motor rating is 11 kW at 400 V AC-3 and 11 kW at 690 V AC-3. AC-3 is the standard duty for squirrel-cage induction motors — starting and switching off under load. The 11 kW at 400 V means this contactor handles a typical 15 HP (11 kW) motor on a 400 V three-phase supply. For reversing or plugging duty (AC-4), the rated operating current is 15.5 A at 400 V, which is lower than the AC-3 current — AC-4 involves inrush on every operation and the contactor must be derated accordingly. ## Auxiliary contact switching capacity The built-in auxiliary contacts are rated for 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V. These are DC ratings for the auxiliary circuit — useful for signalling to a PLC or relay. The AC rating at 230 V is 6 A, and at 400 V is 3 A. The 10 A maximum operating current at AC-12 (resistive) confirms the auxiliary contacts can handle control transformer loads without issue. ## Short-circuit protection and coordination For Type 2 coordination (contactor remains fully functional after a fault), the required fuse is 35 A gL/gG. These values matter when designing the upstream protection — a 35 A fuse limits let-through energy enough to keep the contactor reusable after a short circuit. ## Physical fit and terminal details The contactor measures 45 mm wide, 85 mm high, and 91 mm deep — a standard S0 footprint that occupies three 18 mm module positions on a DIN rail. Main circuit terminals accept screw-type connections: 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), or max. 2x (0.75...4 mm²) for solid wire, and 2x (1...2.5 mm²) or 2x (2.5...6 mm²) for stranded, with a maximum of 2x 10 mm². Auxiliary and control terminals accept 2x (0.5...1.5 mm²) solid or 2x (0.75...2.5 mm²) stranded. The front face is rated IP20, the terminal area is IP00 — meaning the terminals are touch-hazardous and must be inside a closed panel. ## Environmental limits and mounting clearances","metaTitle":"Siemens 3RT1026-1AC20-ZW97 SIRIUS Power Contactor, S0, 24 VA","metaDescription":"Siemens SIRIUS 3RT1026-1AC20-ZW97 power contactor, size S0, 24 VAC 50/60 Hz coil. Rated 11 kW at 400 V AC-3, 15.5 A AC-4. Screw terminals, snap-on DIN rail. Current production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"91 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 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","At The Side":"6 mm","On The Front":"IP20","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","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","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 50 Hz rated value":"24 V","at 500 V rated value":"11 kW","at 60 Hz rated value":"24 V","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","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","Apparent holding power of magnet coil at AC":"8.4 V·A","Apparent pick-up power of magnet coil at AC":"64 V·A","Type of voltage of the control supply voltage":"AC","Inductive power factor with closing power of the coil":"0.72","Inductive power factor with the holding power of the coil":"0.24","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=374404&mlfb=3RT1026-1AC20-ZW97","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1026-1AC20-ZW97/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative — 3RT1023-1AL20?","answer":"The 3RT1023-1AL20 is a different frame size (S00 vs S0) and uses a different coil voltage (230 VAC). It will not drop into the same panel without rewiring: the S00 frame is physically smaller (22.5 mm wide vs 45 mm), and the coil voltage is incompatible. The 3RT1026-1AC20-ZW97 is the correct S0-frame, 24 VAC version."},{"question":"What are the main circuit terminal wire sizes?","answer":"Solid wire: 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), max. 2x (0.75...4 mm²). Stranded: 2x (1...2.5 mm²), 2x (2.5...6 mm²), max. 2x 10 mm². AWG equivalents: 2x (16...12), 2x (14...10), 1x 8."},{"question":"What compliance documentation is available?","answer":"The product is a standard Siemens SIRIUS catalog item, which typically carries CE, UL, CSA, and CCC certifications. Specific compliance documentation (RoHS, REACH, IEC) should be available from the manufacturer's technical documentation portal for this order code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1026-1AC20-ZW97","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/3RT1026-1AC20-ZW97 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}}