{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EM5008-0DK00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EM5008-0DK00","canonicalUrl":"https://aoctrl.com/siemens/4EM5008-0DK00","factsUrl":"https://aoctrl.com/api/mcp/products/4EM5008-0DK00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EM5008-0DK00 commutating choke for converters, single-phase, AC, 690V rated voltage, 20A max AC current, 2.2mH inductance, IP00, screw/tab terminals.","salesMarkdown":"The Siemens 4EM5008-0DK00 is a single-phase commutating choke (line reactor) designed for converter front-ends. It limits current rise during switching events, reducing harmonic distortion and protecting the DC link from line notches. Rated for 690 V AC at 60 Hz, it carries 20 A maximum AC current and delivers 2.2 mH inductance with a 2.4% relative inductive voltage drop at rated load. That 2.4% drop is the key sizing figure — it tells you the choke is matched to the converter's impedance budget, so swapping in a different value shifts the voltage sag and can trip the drive on undervoltage. This choke is IP00 — no enclosure, no finger-safe cover. It mounts inside a panel, typically on a base plate or DIN rail via an optional bracket (not included). Dimensions are 0.115 m deep, 0.097 m wide, 0.111 m tall, so it fits in a standard 200 mm deep enclosure with room for gland plates and wiring ducts. Terminals are screw-type or tab connections, accepting solid or stranded copper up to the rated current. The thermal class B (130 °C) insulation system means the winding can run hot without degrading — fine for a 40 °C ambient, but if your panel ambient pushes past that, derate the continuous current or add forced ventilation. The 20 A maximum AC current is the thermal limit (Ith) — the choke can carry that continuously in free air at 40 °C. The 18 A rated operational current (I_LN) is the design point for the 2.4% voltage drop; running at 20 A pushes the drop higher and increases core saturation, so the 18 A figure is the one to use for sizing against your converter's nominal input current. Power loss splits into 14.3 W in the winding (copper) and 25.8 W in the iron core — total 40.1 W dissipated as heat inside the panel.","metaTitle":"Siemens 4EM5008-0DK00 Commutating Choke, 20A, 2.2mH, 690V","metaDescription":"Siemens 4EM5008-0DK00 single-phase commutating choke for converters. Rated 20A AC, 690V, 2.2mH, IP00, 60Hz. Mature lifecycle, sourced to order. Request RFQ for pricing and availabi","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.115m","Width":"0.097m","title":"4EM5008-0DK00","Height":"0.111m","description":"COMMUTATING CHOKE FOR CONVERTER; PHASES:1; UN1(V):690; ITHMAX 1(A) / F1(HZ):20 /60; I LN (A):18; UK(%):2,4; LN(MH):2,2; TA/ISOKL:40 /B; IP00; TYPE OF TERMINALS:SCREW/TAB CONNECTION; EN 61558-2-20 >CHOKE<","Phase Number":"1","Type Of Voltage":"AC","lifecycle_stage":"mature","Product Designation":"Kommut.-Drossel f. Stromrichter","protection class IP":"IP00","current at AC maximum":"20A","Inductivity Rated Value":"0.0022H","power loss [W] of the coil":"14.3W","Operating Voltage Rated Value":"690V","Ambient Temperature Rated Value":"40°C","Operating Frequency Rated Value":"60Hz","power loss [W] of the iron core":"25.8W","thermal class acc. to IEC 60085":"B","operational current at AC rated value":"18A","Type Of Electrical Connection For Main Current Circuit":"screw-type terminals / tab terminals","Relative Inductive Drop In Voltage For Rated Value Of The Current, Voltage And Frequency":"2.4%"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/95903c2a2f9f716921eaca630df800a3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=341985&mlfb=4EM5008-0DK00"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 4EM5008-0DK00?","answer":"Submit an RFQ through this listing. We source the part to order through independent distribution and confirm pricing and lead time at quote time — no stock count or price is listed here."},{"question":"Will 4EM5008-0DK00 drop into a panel specified around 5SJ3140-7?","answer":"No — the 5SJ3140-7 is a miniature circuit breaker (MCB), not a choke. They serve completely different functions: the MCB protects branch circuits, while this choke filters the converter input. You can't substitute one for the other without rewiring the entire circuit."},{"question":"What compliance documentation does Siemens provide for 4EM5008-0DK00?","answer":"The choke is designed to EN 61558-2-20 (safety of transformers, reactors, and power supply units). Standard documentation includes a declaration of conformity and the product datasheet. Specific RoHS or REACH declarations are available on request from Siemens or through this listing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EM5008-0DK00","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/4EM5008-0DK00 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}