{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1323-5CS41-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1323-5CS41-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RK1323-5CS41-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1323-5CS41-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens ECOFAST reversing starter, AS-Interface, mechanical switching, solid-state overload protection, AC-3 up to 4 kW / 400 V, 2.40...9.00 A, IP65, tab terminals.","salesMarkdown":"The Siemens 3RK1323-5CS41-1AA0 is an ECOFAST reversing starter designed for motor control in distributed automation architectures. It combines mechanical switching contacts with solid-state electronic overload protection, rated for AC-3 duty up to 4 kW at 400 V, with an adjustable current range of 2.4 A to 9 A. The unit communicates over AS-Interface, making it a drop-in node for AS-i networks without requiring a separate PROFIBUS DP gateway. The solid-state overload (type of motor protection) provides adjustable trip class and eliminates the bimetal drift of thermal relays — important for applications with frequent starts or varying ambient temperatures. The mechanical switching contacts handle the main current path; short-circuit protection is provided externally via fuses (design of short-circuit protection), so the panel builder must size and install the correct upstream fuses. This suits washdown environments, outdoor installations under cover, or food-and-beverage zones where hose-down cleaning is routine. AS-Interface bus communication (AS-interface protocol: Yes) means this starter is a slave on an AS-i network, carrying digital inputs (2x DC 24 V) and control signals over the two-wire flat cable. No PROFIBUS DP onboard — if the line uses PROFIBUS, a gateway is required. The bus communication function is built in, so no separate bus module is needed. Reversing starters of this type are deployed in conveyor systems, hoists, door operators, and any application requiring forward/reverse motor control from a single device. The ECOFAST form factor is designed for distributed installation close to the motor — mounted on machine frames or in small junction boxes — rather than in a central MCC. The AS-Interface connection reduces field wiring to a single two-conductor cable carrying both power and data. Sourcing is via quoted-to-order RFQ. Lead time should be confirmed against the project schedule. No official cross-reference or second-source exists in the evidence. ## Integration notes Dimensions are 130 mm wide, 250 mm high, and 91 mm deep. Tab terminals for the main circuit require female quick-connects.","metaTitle":"Siemens 3RK1323-5CS41-1AA0 ECOFAST Reversing Starter, 4 kW","metaDescription":"Siemens 3RK1323-5CS41-1AA0 ECOFAST reversing starter, AS-Interface, solid-state overload, 2.4-9 A, 4 kW at AC-3 400 V, IP65. Active production. RFQ for lead time.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Depth":"91 mm","Width":"130 mm","Height":"250 mm","Maximum":"500 V","Minimum":"400 V","Initial Value":"2.4 A","Type of voltage":"DC","lifecycle_stage":"current","Full-scale value":"9 A","Type of assignment":"1","Protection class IP":"IP65","PROFIBUS DP protocol":"No","AS-interface protocol":"Yes","Design of the product":"reversing starter","Type of the motor protection":"solid-state","Design of the switching contact":"mechanical","Design of short-circuit protection":"fuse","Product function Bus communication":"Yes","Ambient temperature during operation":"-20 ... +40 °C","Product component Motor brake output":"No","Equipment marking acc. to DIN EN 61346-2":"Q","Operating power at AC-3 at 400 V rated value":"4 000 W","Type of electrical connection for main current circuit":"tab terminals","Maximum short-circuit current breaking capacity (Icu) at 400 V rated value":"100 kA"}},"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=117812&mlfb=3RK1323-5CS41-1AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1323-5CS41-1AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the physical size of the 3RK1323-5CS41-1AA0?","answer":"The enclosure measures 130 mm wide, 250 mm high, and 91 mm deep. Main circuit connections use tab terminals (female quick-connects)."},{"question":"Does this starter require external short-circuit protection?","answer":"Yes, the design of short-circuit protection is 'fuse', meaning upstream fuses must be provided by the installer. The solid-state overload handles the running overload protection only."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1323-5CS41-1AA0","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/3RK1323-5CS41-1AA0 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}}