{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1323-5BS41-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1323-5BS41-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RK1323-5BS41-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1323-5BS41-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens ECOFAST reversing starter, 3RK1323-5BS41-1AA0, AS-Interface, mechanical switching, solid-state overload, 0.3–3.0 A, 1.1 kW at AC-3 400 V, IP65.","salesMarkdown":"## What this reversing starter does The Siemens 3RK1323-5BS41-1AA0 is an ECOFAST reversing starter — a compact, IP65-rated unit that combines a reversing contactor pair with solid-state electronic overload protection, all in one enclosure. It switches motor loads up to 1.1 kW at AC-3 duty on a 400 V supply, with the current adjustable from 0.3 A to 3.0 A. The solid-state overload provides accurate, drift-free protection against motor heating, unlike a bimetal relay that can shift over time. The mechanical switching contacts handle the power circuit, while the AS-Interface bus connection carries control and diagnostics — no parallel control wiring needed. The 1.1 kW at AC-3 400 V rating tells you the motor power this starter can handle in the most common industrial duty — starting and stopping a squirrel-cage induction motor under load. The 0.3 A to 3.0 A adjustment range covers small motors, typically fractional to about 3 HP at 400 V three-phase. The operating temperature range of -20 to +40 °C is standard for indoor industrial environments; if your line runs hotter than 40 °C, the overload must be derated per the thermal curve. The main circuit connects via tab terminals, not screw clamps — so your panel wiring plan needs the matching tab receptacles, typically 6.3 mm or 4.8 mm fastons. ## Integration with AS-Interface The AS-Interface protocol connection carries both the reversing commands (forward/reverse) and the overload trip signal back to the controller. Two digital inputs at 24 V DC are integrated for local pushbuttons or limit switches. The enclosure is plastic, IP65, sized at 130 mm wide, 250 mm high, 91 mm deep — it mounts directly on the machine frame via the ECOFAST base plate, not on a DIN rail. No separate contactor panel is needed. The bus communication function is built in; no external gateway module is required for AS-Interface.","metaTitle":"Siemens 3RK1323-5BS41-1AA0 ECOFAST Reversing Starter, 0.3-3","metaDescription":"Siemens ECOFAST reversing starter, AS-Interface, solid-state overload, 0.3-3 A, 1.1 kW at AC-3 400 V, IP65. Current lifecycle stage. Sourced to order against RFQ.","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":"0.3 A","Type of voltage":"DC","lifecycle_stage":"current","Full-scale value":"3 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":"1 100 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=17437&mlfb=3RK1323-5BS41-1AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1323-5BS41-1AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RK1323-5BS41-1AA0?","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 the closest functional second-source for 3RK1323-5BS41-1AA0?","answer":"The Siemens 3RT5065-6AB36 is a SIRIUS power contactor, not a reversing starter — it lacks the reversing contactor pair, the solid-state overload, the AS-Interface bus, and the IP65 enclosure. It will not drop into the same panel without rewiring and a separate overload relay and reversing contactor set. There is no direct form-fit-function substitute; the ECOFAST design is unique to Siemens."},{"question":"What compliance documentation is available for this part?","answer":"The evidence does not list specific compliance certificates (UL, CSA, CE, RoHS, REACH) for this order code. Standard Siemens ECOFAST documentation typically includes a CE declaration of conformity and RoHS compliance; verify with the supplier at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1323-5BS41-1AA0","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/3RK1323-5BS41-1AA0 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}}