{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EP3400-0JS00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EP3400-0JS00","canonicalUrl":"https://aoctrl.com/siemens/4EP3400-0JS00","factsUrl":"https://aoctrl.com/api/mcp/products/4EP3400-0JS00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EP3400-0JS00 commutating choke for converter, 3-phase, 18A rated, 0.39 mH, IP00, free cable endings, EN 61558-2-20.","salesMarkdown":"The Siemens 4EP3400-0JS00 is a 3-phase commutating choke for converter applications, rated 18 A continuous with a maximum of 20 A. Its 0.39 mH inductance shapes the current rise on the DC link or input side of a variable-speed drive, limiting di/dt and reducing harmonic stress on the upstream supply and the converter's semiconductors. The 18 A rated current (I_LN) at 50 Hz with a 40 °C ambient is the continuous thermal limit for a 3-phase converter input or DC-link circuit. The 20 A maximum (I_thmax) allows short-term overload headroom. The 0.39 mH inductance and 0% relative inductive voltage drop (UK) mean this choke is designed for low-impedance insertion — it filters without dropping significant line voltage at rated current. The 32.6 W coil loss plus 4.6 W iron-core loss at 40 °C ambient gives a total dissipation of about 37 W; factor that into enclosure thermal calculations. Thermal class B per IEC 60085 means the insulation system withstands 130 °C hot-spot temperature, adequate for continuous duty in a ventilated cabinet. Commutating chokes (also called line reactors or DC-link reactors) sit between the AC supply and a variable-frequency drive's rectifier, or in the DC link of a regenerative converter. They smooth current ripple, limit peak currents during commutation, and protect both the drive's input diodes and the upstream distribution from high-frequency harmonics. This 3-phase unit is sized for a converter in the 18 A class — typical for a 7.5 kW to 11 kW motor drive at 400 V three-phase. ## Integration Notes Mounting dimensions: 0.124 m width, 0.122 m height, 0.073 m depth. The free cable endings require a terminal block or lug connection inside the panel — no screw terminals on the choke body. Verify the cable cross-section matches your drive's input wiring; the choke is passive and polarity-independent for AC installation. Panel clearance around the IP00 core is recommended for airflow to dissipate the 37 W total loss.","metaTitle":"Siemens 4EP3400-0JS00 Commutating Choke, 18A, 0.39 mH, 3-Pha","metaDescription":"Siemens 4EP3400-0JS00 commutating choke for converters. 3-phase, 18A rated, 0.39 mH, IP00, EN 61558-2-20. Mature lifecycle. Available to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.073m","Width":"0.124m","Height":"0.122m","Maximum":"20A","Rated Value":"18A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"24.5A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.00039H","Power loss [W] of the coil":"32.6W","Operating voltage rated value":"0V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"4.6W","Thermal class acc. to IEC 60085":"B","Type of electrical connection for main current circuit":"free cable endings","Relative inductive drop in voltage on the measurement level current, voltage and frequency":"0%"}},"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=82731&mlfb=4EP3400-0JS00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EP3400-0JS00/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of 4EP3400-0JS00?","answer":"3-phase commutating choke, 18 A rated (20 A max), 0.39 mH inductance, 50 Hz, 40 °C ambient, IP00, thermal class B, with free cable endings. Total power loss is approximately 37 W (32.6 W coil + 4.6 W iron core)."},{"question":"Where can I buy 4EP3400-0JS00?","answer":"This part is sourced and quoted to order against an RFQ through independent industrial-automation distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead-time estimate."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EP3400-0JS00","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/4EP3400-0JS00 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}}