{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EP4003-1DS00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EP4003-1DS00","canonicalUrl":"https://aoctrl.com/siemens/4EP4003-1DS00","factsUrl":"https://aoctrl.com/api/mcp/products/4EP4003-1DS00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 4EP4003-1DS00 commutating choke for converter, 3-phase, 500 V AC, 50 Hz, 50.4 A rated current, 0.52 mH inductance, IP00, flat-type terminals.","salesMarkdown":"The Siemens 4EP4003-1DS00 is a three-phase commutating choke (line reactor) designed for converter front-end duty — it sits between the AC line and the rectifier to limit current rise, reduce harmonics, and protect the DC link from line-side transients. Rated for 500 V AC at 50 Hz, it carries a continuous current of 50.4 A (56 A maximum, 71 A peak), with an inductance of 0.00052 H and a relative inductive voltage drop of 4% at rated conditions. The 4% voltage drop is the key specification for sizing — it determines the impedance the choke presents to the drive's switching frequency. For a 500 V system, that drop is about 20 V line-to-line at full rated current, which the drive's DC bus regulation typically absorbs without issue. The 50.4 A rated current (56 A maximum) is the thermal continuous rating at 40 °C ambient with Class B insulation (130 °C hot-spot limit per IEC 60085). The 71 A peak rating covers short-duration overloads — typical for a drive's inrush or a momentary load step — but sustained operation above 56 A will exceed the thermal design. Total power loss splits between the coil (80 W) and the iron core (25 W), for a combined 105 W at full load. That heat must be dissipated into the surrounding air; the IP00 enclosure means no fan or forced cooling is built in, so panel ventilation or derating is required if ambient exceeds 40 °C. This choke mounts in the AC line path ahead of a variable-frequency drive or DC drive converter, typically on a mounting plate inside a control panel. Dimensions are 0.219 m wide by 0.179 m tall by 0.143 m deep — about the footprint of a large contactor.","metaTitle":"Siemens 4EP4003-1DS00 Commutating Choke, 50.4 A, 0.52 mH","metaDescription":"Siemens 4EP4003-1DS00 commutating choke for converter duty. Rated 50.4 A continuous, 56 A max, 71 A peak. 0.52 mH, IP00, flat-type terminals. Mature lifecycle; sourced to order aga","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":"56A","Rated Value":"50.4A","Peak current":"71A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"68.6A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.00052H","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":"25W","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=510924&mlfb=4EP4003-1DS00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EP4003-1DS00/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EP4003-1DS00","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/4EP4003-1DS00 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}}