{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU4321-1DA00-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU4321-1DA00-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU4321-1DA00-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU4321-1DA00-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EU4321-1DA00-0A commutating choke for converter, 3-phase, 690V AC, 50Hz, 720A rated current, 1000A peak, 0.000048H inductance, IP00, Class H insulation, flat-type terminals.","salesMarkdown":"## What this choke does in a drive line The Siemens 4EU4321-1DA00-0A is a three-phase commutating choke (Kommut.-Drossel f. Stromrichter) designed for the DC link or AC input of a converter drive. Its job is to limit the rate of rise of current (di/dt) during thyristor or IGBT commutation, reducing switching losses and suppressing harmonics that would otherwise reflect back onto the supply. Rated at 720 A continuous with a peak capability of 1 000 A, it handles the repetitive current pulses a six-pulse rectifier draws without saturating the core. That 4 % figure is the key spec for sizing: too low and commutation notches get worse; too high and the DC bus sags under load. ## Thermal and mechanical constraints for panel integration IP00 means no enclosure — the choke is a bare magnetic assembly intended for mounting inside a ventilated cabinet. The combined power loss is 760 W (460 W in the coil, 300 W in the iron core), so forced-air cooling or a generously sized enclosure with natural convection is required. Class H insulation (180 °C thermal class per IEC 60085) gives a 40 °C ambient rating with headroom for hot-spot rise; derate the continuous current if the cabinet ambient exceeds that. The footprint is 0.46 m wide × 0.435 m tall × 0.265 m deep — a substantial panel-mounted component. Terminals are flat-type connectors for bolted bus-bar or cable-lug connections; plan for access on both sides. No DIN-rail clip — this is a through-bolt or bracket mount.","metaTitle":"Siemens 4EU4321-1DA00-0A Commutating Choke, 720A, 690V, 50Hz","metaDescription":"Siemens 4EU4321-1DA00-0A commutating choke for converters. 720A rated, 1000A peak, 690V AC, 50Hz, IP00, Class H insulation. 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":"800A","Rated Value":"720A","Peak current":"1 000A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"980.3A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.000048H","Power loss [W] of the coil":"460W","Operating voltage rated value":"690V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"300W","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=136273&mlfb=4EU4321-1DA00-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU4321-1DA00-0A/alternatives.json"},"ai":{"faq":[{"question":"What is the 4EU4321-1DA00-0A used for?","answer":"It is a commutating choke for a converter drive. It limits di/dt during thyristor or IGBT commutation, reduces harmonics, and protects the DC link from switching transients. Typical applications include the AC input or DC-link section of variable-speed drives for pumps, fans, conveyors, and other motor loads."},{"question":"Where can I buy the 4EU4321-1DA00-0A?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead-time commitment."},{"question":"What are the key ratings of the 4EU4321-1DA00-0A?","answer":"720 A rated continuous current, 1 000 A peak, 690 V AC operating voltage, 50 Hz, 0.000048 H inductance, 4 % relative inductive drop, 760 W total power loss, IP00 protection, Class H insulation (180 °C)."},{"question":"Does the 4EU4321-1DA00-0A have UL or CSA recognition?","answer":"Yes, the description states it is UL/CSA-recognized and complies with EN 61558-2-20. The UL/CSA mark covers the safety of the magnetic component for use in North American panels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU4321-1DA00-0A","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/4EU4321-1DA00-0A 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}}