{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1326-1AU00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1326-1AU00","canonicalUrl":"https://aoctrl.com/siemens/3RT1326-1AU00","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1326-1AU00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S0 power contactor, 3RT1326-1AU00, 4-pole, 4 NO main contacts, 11 kW at 400 V AC-2, screw terminals, 61 x 85 x 91 mm, snap-on DIN rail.","salesMarkdown":"## SIRIUS S0 power contactor — 4-pole, 11 kW AC-2 at 400 V The Siemens 3RT1326-1AU00 is a SIRIUS S0-frame power contactor with four main poles, all normally open, rated for 11 kW at 400 V in AC-2 duty — the duty class for slip-ring motor starting and plugging, where the contactor makes and breaks the load current at reduced inrush. That 11 kW figure at 400 V is the load the contactor can switch under those conditions, not a continuous thermal rating; for continuous current the AC-1 resistive rating governs, and for across-the-line squirrel-cage starts you need the AC-3 or AC-4 curve. The S0 frame is the middle size in the SIRIUS contactor family, sized for motor loads up to about 18.5 kW in AC-3 depending on the variant, but this specific order code is configured for the higher electrical endurance of AC-2 service. ## Mounting and panel integration — DIN rail, S0 footprint The S0 envelope is 61 mm wide, 85 mm tall, 91 mm deep — a compact footprint that leaves room for a full motor starter combination (contactor + overload relay + fuse disconnect) in a 200 mm wide enclosure bay. The IP20 front-of-terminal protection is adequate for enclosed panel use; the terminal body itself is IP00, so live parts are exposed when the contactor is removed from the panel — standard for open-device contactors. ## Termination and wiring — screw terminals, dual-wire capacity Main and auxiliary circuits use screw-type terminals. The main circuit accepts solid or stranded conductors: 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), or a single 10 mm². The auxiliary circuit accepts 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²). AWG equivalents are 2x (20 to 16) and 2x (18 to 14) for the main, same for aux. This dual-wire capacity is useful for looping the supply through the contactor to feed a downstream device without a separate terminal block — common in motor starter assemblies. The fine-stranded with ferrule range is the same as the solid range, so no special preparation is needed for stranded control wiring. ## Coordination and protection — Type 1 and Type 2 fuse ratings For short-circuit protection the contactor is coordinated with gL/gG fuses: Type 2 coordination requires a 35 A fuse, Type 1 coordination a 63 A fuse.","metaTitle":"Siemens 3RT1326-1AU00 SIRIUS S0 Power Contactor, 4-pole 11 k","metaDescription":"Siemens SIRIUS 3RT1326-1AU00 S0 power contactor, 4 NO main contacts, 11 kW at 400 V AC-2, 4-pole, screw terminals, DIN rail mount. Current lifecycle: active 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":"61 mm","Height":"85 mm","Maximum":"2 000 m","at 50 Hz":"0.8 ... 1.1","At The Side":"6 mm","On The Front":"IP20","1 Rated Value":"50 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":"240 V","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","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 (20 ... 16), 2x (18 ... 14), 1x 12","With Type Of Coordination 1 Required":"fuse gL/gG: 63 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":"4","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":"4","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":"7.8 V·A","Apparent pick-up power of magnet coil at AC":"61 V·A","Type of voltage of the control supply voltage":"AC","Inductive power factor with closing power of the coil":"0.82","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=153932&mlfb=3RT1326-1AU00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1326-1AU00/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RT1326-1AU00?","answer":"The depth is 91 mm, with a width of 61 mm and height of 85 mm — the S0 frame size."},{"question":"What wire sizes does the main circuit accept?","answer":"The main circuit screw terminals accept solid or stranded conductors: 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), or a single 10 mm². AWG equivalents are 2x (20 to 16) and 2x (18 to 14)."},{"question":"What short-circuit protection is required for Type 2 coordination?","answer":"Type 2 coordination requires a gL/gG fuse rated at 35 A. Type 1 coordination allows a 63 A fuse."},{"question":"Where can I buy 3RT1326-1AU00?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at the time of quote."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1326-1AU00","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/3RT1326-1AU00 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}}