{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EP3905-0AK00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EP3905-0AK00","canonicalUrl":"https://aoctrl.com/siemens/4EP3905-0AK00","factsUrl":"https://aoctrl.com/api/mcp/products/4EP3905-0AK00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EP3905-0AK00 commutating choke for converter duty, 3-phase, 400V AC, 180A rated / 200A max, 0.03 mH, IP00, flat-type terminals.","salesMarkdown":"The Siemens 4EP3905-0AK00 is a three-phase commutating choke (line reactor) designed for converter input or output circuits. Rated for a 40 °C ambient with Class B insulation (130 °C hot-spot per IEC 60085), the choke dissipates 69 W in the coil and 13 W in the iron core at full load — total 82 W of heat to vent inside the enclosure. ## Where it goes — panel and circuit fit Dimensions are 0.219 m wide, 0.179 m tall, and 0.123 m deep. The main circuit connects via flat-type terminals (flat connector) — expect busbar or large-gauge ring-tongue lugs, not spring-cage or screw-clamp. Verify the terminal spacing against your existing busbar layout before panel layout. This is a three-phase device; the 0.5% impedance is low enough that it won't cause significant voltage drop under normal load, but it will limit fault-current rise rate. Typical placement is between the line supply and the converter input (or between the converter output and the motor, depending on the drive topology). IP00 means no integral cooling fan — the cabinet's forced-air or natural convection must handle the 82 W heat load.","metaTitle":"Siemens 4EP3905-0AK00 Commutating Choke, 180A, 400V AC, 3-Ph","metaDescription":"Siemens 4EP3905-0AK00 commutating choke for converters. 180A rated, 200A max, 400V AC, 3-phase, 0.03 mH. IP00. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.123m","Width":"0.219m","Height":"0.179m","Maximum":"200A","Rated Value":"180A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.00003H","Power loss [W] of the coil":"69W","Operating voltage rated value":"400V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"13W","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":"0.5%"}},"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=485708&mlfb=4EP3905-0AK00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EP3905-0AK00/alternatives.json"},"ai":{"faq":[{"question":"What are the key specifications of 4EP3905-0AK00?","answer":"Three-phase commutating choke, 400 V AC, 50 Hz, 180 A rated / 200 A maximum, 0.03 mH inductance, 0.5% relative voltage drop, IP00, Class B insulation, flat-type terminals. Dimensions: 0.219 m wide × 0.179 m tall × 0.123 m deep."},{"question":"Where can I buy 4EP3905-0AK00 and get current pricing?","answer":"We source this part to order against an RFQ through our independent distribution network. Availability and current pricing are confirmed at quote time — submit an RFQ for your quantity and delivery timeline."},{"question":"Will 4EP3905-0AK00 fit in a panel designed for a miniature circuit breaker like 5SJ3140-7?","answer":"No — this is a completely different class of device. The 4EP3905-0AK00 is a 0.219 m wide × 0.179 m tall × 0.123 m deep power choke weighing and sized for 180 A busbar connections, while the 5SJ3140-7 is a 1-pole 40 A DIN-rail MCB. They are not physically or electrically interchangeable."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EP3905-0AK00","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/4EP3905-0AK00 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}}