{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU4321-0BD00-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU4321-0BD00-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU4321-0BD00-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU4321-0BD00-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU4321-0BD00-0A commutating choke for converter, 3-phase, 690 V AC, 1640 A max, 1476 A rated, 0.015 mH, IP00, flat-type terminals, thermal class H.","salesMarkdown":"The Siemens 4EU4321-0BD00-0A is a commutating choke (line reactor) for converter applications — 3-phase, 690 V AC rated voltage, 1640 A maximum current, 1476 A rated current, and 0.015 mH inductance. Built to EN 61558-2-20, it limits current rise and harmonics on the AC side of a drive or converter, protecting the semiconductor bridge from commutation notches and reducing line-side distortion. The 1640 A maximum current (Ithmax) at 50 Hz sets the thermal limit for continuous operation — sized for a 1476 A nominal (ILN) converter input. The 0.015 mH inductance is low — typical for a high-current, high-frequency commutating choke rather than a bulk line reactor; it targets the commutation notch, not total harmonic filtering. Thermal class H (180 °C) insulation per IEC 60085 allows the choke to run hot in a sealed cabinet. Total power loss is 995 W (670 W coil + 325 W iron core) at rated conditions — that heat must be vented or the enclosure derated accordingly. IP00 means no ingress protection; the choke requires a cabinet with at least IP2X or better to keep tools and debris off the windings. Commutating chokes sit on the AC input of a 3-phase converter or drive, between the supply and the rectifier. They limit the rate of current rise (di/dt) during commutation, reducing voltage notches that can trip upstream protection or radiate EMI. They also smooth the DC-link current ripple to some degree. This class of part is standard on any medium-to-high-power drive installation where the line impedance is low or where the drive manufacturer specifies an external choke for the frame size. Footprint is 0.46 m wide × 0.435 m high × 0.265 m deep — a substantial enclosure; verify panel door clearance and busbar access before laying out. Main circuit connection uses flat-type terminals (busbar or cable lug), not spring-cage or screw-clamp. No DIN-rail mount — the choke bolts directly to a mounting plate or chassis.","metaTitle":"Siemens 4EU4321-0BD00-0A Commutating Choke, 1640 A, 690 V AC","metaDescription":"Siemens 4EU4321-0BD00-0A commutating choke for converter, 3-phase, 690 V AC, 1640 A max, 1476 A rated, 0.015 mH, IP00. Mature lifecycle. Sourced to order. Request quote.","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 640A","Rated Value":"1 476A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"2 009.8A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.000015H","Power loss [W] of the coil":"670W","Operating voltage rated value":"690V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"325W","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":"2%"}},"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=14919&mlfb=4EU4321-0BD00-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU4321-0BD00-0A/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU4321-0BD00-0A","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/4EU4321-0BD00-0A 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}}