{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1326-1AC20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1326-1AC20","canonicalUrl":"https://aoctrl.com/siemens/3RT1326-1AC20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1326-1AC20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, size S0, 3RT1326-1AC20, 4 NO main contacts, 11 kW at AC-2 400 V, screw terminals, DIN-rail mount.","salesMarkdown":"## SIRIUS S0 power contactor — 4-pole NO, 11 kW at AC-2 400 V The Siemens SIRIUS 3RT1326-1AC20 is a size S0 power contactor with four normally open main contacts, rated for 11 kW at AC-2 duty at 400 V. Rated operational current at 24 V is 10 A, dropping to 6 A at 230 V and 3 A at 400 V. The contactor handles AC-2 motor loads up to 11 kW at 400 V, which covers most squirrel-cage induction motors in that power band. For type 2 coordination, the required fuse is gL/gG 35 A; type 1 coordination allows up to 63 A gL/gG. ## Mounting and wiring integration Dimensions are 85 mm height, 61 mm width, and 91 mm depth. The 61 mm width is the S0 frame standard, so it occupies one 18 mm module position on a DIN rail. Main circuit terminals are screw-type, accepting solid conductors from 2x (0.5 to 1.5 mm²) up to 2x (0.75 to 4 mm²), and stranded from 2x (1 to 2.5 mm²) up to 2x 10 mm². AWG equivalents are 2x (20 to 16) solid and 2x (18 to 14) stranded, with a maximum 1x 12 AWG. The auxiliary contact block terminals accept 2x (0.5 to 1.5 mm²) solid and 2x (0.75 to 2.5 mm²) stranded, max 2x (0.75 to 4 mm²). Strip length should follow standard practice for screw terminals — typically 8 to 10 mm for the main terminals.","metaTitle":"Siemens 3RT1326-1AC20 SIRIUS Power Contactor, 4-Pole NO, 11","metaDescription":"Siemens SIRIUS 3RT1326-1AC20 power contactor, size S0. 4 NO main contacts, 11 kW rated at AC-2 400 V. Screw terminals, DIN-rail mount. Current lifecycle stage. Quoted to order.","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 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 60 Hz rated value":"24 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":"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":"$356.12","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=439841&mlfb=3RT1326-1AC20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1326-1AC20/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1326-1AC20?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is 3RT1326-1AC20's depth?","answer":"The depth is 91 mm."},{"question":"What wire sizes does the 3RT1326-1AC20 accept?","answer":"Main circuit screw terminals accept solid conductors from 2x (0.5 to 1.5 mm²) up to 2x (0.75 to 4 mm²), and stranded from 2x (1 to 2.5 mm²) up to 2x 10 mm². Auxiliary terminals accept 2x (0.5 to 1.5 mm²) solid and 2x (0.75 to 2.5 mm²) stranded, max 2x (0.75 to 4 mm²)."},{"question":"Will 3RT1326-1AC20 drop into a panel specified for 3RT1023-1AL20 without rewiring?","answer":"Both are SIRIUS size S0 contactors with the same DIN-rail mounting footprint, so mechanical fit is identical. However, the 3RT1326-1AC20 has 4 NO main contacts versus the 3RT1023-1AL20's configuration, so verify the contact arrangement matches your circuit before substituting."},{"question":"What compliance documentation does Siemens provide for 3RT1326-1AC20?","answer":"The reference code per DIN EN 81346-2 is Q. The product carries the SIRIUS brand designation. Specific compliance documents (RoHS, REACH, UL, IEC) should be requested at quote time as they are not listed in the base specification."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1326-1AC20","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/3RT1326-1AC20 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}}