{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EP4003-2DS00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EP4003-2DS00","canonicalUrl":"https://aoctrl.com/siemens/4EP4003-2DS00","factsUrl":"https://aoctrl.com/api/mcp/products/4EP4003-2DS00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EP4003-2DS00 commutating choke for converter applications, 3-phase, 500V AC, 71A max, 0.4mH, IP00, flat-type terminals.","salesMarkdown":"## Current ratings — the real load envelope Three current figures define the operating envelope. The 71 A maximum (Ithmax) at 50 Hz is the thermal current limit in free air — this is the hard ceiling for continuous operation. The 63.9 A rated value (I LN) is the nominal current at which the 4% voltage drop is specified and the 80 W coil loss plus 26 W iron loss apply. The 89 A peak current and 87 A DC rated value tell you the choke can handle short-duration overloads and DC-link ripple without saturating. For a 400 V class drive, this choke is typically paired with a converter rated around 45–55 kW output, but the exact match depends on the drive's own line-side current draw and switching frequency. ## Thermal class and cooling Rated for 40 °C ambient with Class B insulation (130 °C hot-spot limit per IEC 60085). The combined 106 W power loss (80 W coil + 26 W iron) must be dissipated into the panel air — this is not a negligible heat source. The IP00 rating means no enclosure protection; the choke is an open-frame component intended for installation inside a cabinet or cubicle where personnel cannot contact live parts. ## Physical fit and connections Dimensions: 0.219 m wide, 0.179 m tall, 0.143 m deep. The main circuit connects via flat-type terminals — these are bus-bar or cable-lug connections, not screw-clamp or spring-cage. Plan for lug-type terminations and adequate bending radius for the power cables. The open-frame construction means it mounts on a chassis plate or sub-panel, not a DIN rail. Classified as a mature product. It remains in the active catalog but is not a current-promotion or high-velocity line item. No official successor order code has been published, so this is the current form-fit-function part for new builds and replacement.","metaTitle":"4EP4003-2DS00 Commutating Choke, 71A, 500V AC, 50Hz","metaDescription":"Siemens 4EP4003-2DS00 commutating choke for converters. 71A max, 500V AC, 50Hz, 0.4mH, IP00. Mature lifecycle; sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.143m","Width":"0.219m","Height":"0.179m","Maximum":"71A","Rated Value":"63.9A","Peak current":"89A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"87A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.0004H","Power loss [W] of the coil":"80W","Operating voltage rated value":"500V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"26W","Thermal class acc. to IEC 60085":"B","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=6167&mlfb=4EP4003-2DS00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EP4003-2DS00/alternatives.json"},"ai":{"faq":[{"question":"What are the key specifications of 4EP4003-2DS00?","answer":"Three-phase commutating choke for converters, 500 V AC, 50 Hz, 71 A maximum current, 63.9 A rated current, 0.4 mH inductance, 4% voltage drop, IP00, Class B insulation, flat-type terminals."},{"question":"Where can I buy 4EP4003-2DS00?","answer":"Sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time."},{"question":"What compliance standards does 4EP4003-2DS00 meet?","answer":"Designed and tested per EN 61558-2-20 (safety of transformers, reactors, and power supply units — particular requirements for small reactors). Thermal class B per IEC 60085."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EP4003-2DS00","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/4EP4003-2DS00 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}}