{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU4321-0BN00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU4321-0BN00","canonicalUrl":"https://aoctrl.com/siemens/4EU4321-0BN00","factsUrl":"https://aoctrl.com/api/mcp/products/4EU4321-0BN00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU4321-0BN00 commutating choke for converter, 3-phase, 520V AC, 1132A rated, 50Hz, IP00, thermal class H, flat-type terminal.","salesMarkdown":"The Siemens 4EU4321-0BN00 is a commutating choke (line reactor) for converter applications, designed to limit current rise and reduce harmonics on the AC side of a drive or rectifier. It's a 3-phase, 520V AC rated choke pulling 1132A continuous — that's the current it'll carry without saturating, sized for a hefty drive line. Rated inductance is 0.000023 H (23 µH) with a relative inductive voltage drop of 4% at rated current and frequency — that 4% drop is the impedance it adds to the line, typical for a 4% line reactor used to protect the converter from line spikes and to smooth out current draw. Total power loss splits between the coil (712W) and the iron core (222W), for a combined 934W at rated load. That's heat that needs to leave the enclosure — at IP00 with no enclosure of its own, it's meant to be mounted in a ventilated cabinet or open panel where that dissipation can convect away. That 1132A is the RMS line current it can pass without exceeding the insulation temperature limit — if your drive's input current is lower, it runs cooler; if higher, you need a bigger choke or forced cooling. It also carries a DC rated value of 1387.2A — that's the current it can handle if used on the DC bus side of a converter (though it's spec'd as an AC commutating choke). The DC rating is higher because DC doesn't have the same skin effect and core losses as 50Hz AC. IP00 means no ingress protection — it's an open component. Mount it in a clean, dry, ventilated enclosure; it's not for washdown or dusty environments. The flat-type main circuit connectors are bus-bar style lugs, not screw terminals — expect to bolt copper bars or cable lugs directly.","metaTitle":"Siemens 4EU4321-0BN00 Commutating Choke, 1132A 520V 3-Phase","metaDescription":"Siemens 4EU4321-0BN00 commutating choke for converters. 1132A rated, 520V AC, 3-phase, 50Hz. IP00, thermal class H. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.265m","Width":"0.46m","Height":"0.435m","Maximum":"1 132A","Rated Value":"1 132A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"1 387.2A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.000023H","Power loss [W] of the coil":"712W","Operating voltage rated value":"520V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"222W","Thermal class acc. to IEC 60085":"H","Type of electrical connection for main current circuit":"flat connector","Relative inductive drop in voltage on the measurement level current, voltage and frequency":"4%"}},"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=135128&mlfb=4EU4321-0BN00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU4321-0BN00/alternatives.json"},"ai":{"faq":[{"question":"What are the key specifications of 4EU4321-0BN00?","answer":"3-phase commutating choke, 520V AC, 1132A rated current, 23 µH inductance, 4% voltage drop at 50Hz. Thermal class H (180°C), IP00, flat-type terminals. Power loss 934W total at rated load."},{"question":"Where can I buy 4EU4321-0BN00?","answer":"This part is sourced to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is the physical size of 4EU4321-0BN00?","answer":"Width 0.46m, height 0.435m, depth 0.265m. It's a substantial component — plan for cabinet space accordingly."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU4321-0BN00","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/4EU4321-0BN00 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}}