{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EM5003-2CB00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EM5003-2CB00","canonicalUrl":"https://aoctrl.com/siemens/4EM5003-2CB00","factsUrl":"https://aoctrl.com/api/mcp/products/4EM5003-2CB00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 4EM5003-2CB00 commutating choke for converters, 1-phase, 230V AC, 50Hz, 33A max / 29.7A rated, 0.77mH, IP00, screw terminals.","salesMarkdown":"The Siemens 4EM5003-2CB00 is a single-phase commutating choke (line reactor) for converter applications, rated 230V AC at 50Hz. It carries a maximum continuous current of 33A and a rated current of 29.7A, with an inductance of 0.77mH. The 33A maximum current (Ithmax) is the thermal limit at 40°C ambient — size your upstream protection so the choke never sees sustained current above that. The 29.7A rated current (ILN) is the continuous design point at 50Hz; the choke's total power loss splits 13.6W in the coil and 27.9W in the iron core, so panel ventilation matters, especially if you're grouping several chokes in a confined enclosure. The DC rated value of 40.4A tells you this choke can handle the DC-side ripple current in a single-phase rectifier — the DC rating is higher than the AC rating because the RMS heating effect differs. Thermal class B per IEC 60085 means the insulation system is rated for 130°C hot-spot, which is standard for general-purpose industrial chokes. IP00 means no enclosure — it's an open-frame component for mounting inside a cabinet. The screw-type terminals accept standard ring or fork lugs; plan for a 0.115m depth (115mm) in your panel layout, with 0.097m width and 0.111m height. Commutating chokes sit between the AC line and the rectifier input of a variable-speed drive or DC drive. Their job is to limit the rate of current rise during commutation, reduce diode/capacitor stress, and attenuate line notches. On a single-phase converter, this 4EM5003-2CB00 handles the full input current — it's a line-side component, not a motor-side dV/dt filter.","metaTitle":"Siemens 4EM5003-2CB00 Commutating Choke, 33A, 0.77mH","metaDescription":"Siemens 4EM5003-2CB00 commutating choke for converters. 33A max, 29.7A rated, 0.77mH, 230V AC, 50Hz, IP00. Mature lifecycle, sourced to order. Quoted against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.115m","Width":"0.097m","Height":"0.111m","Maximum":"33A","Rated Value":"29.7A","Phase number":"1","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"40.4A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.00077H","Power loss [W] of the coil":"13.6W","Operating voltage rated value":"230V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"27.9W","Thermal class acc. to IEC 60085":"B","Type of electrical connection for main current circuit":"screw-type terminals","Relative inductive drop in voltage on the measurement level current, voltage and frequency":"3%"}},"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=118893&mlfb=4EM5003-2CB00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EM5003-2CB00/alternatives.json"},"ai":{"faq":[{"question":"What is the physical size of 4EM5003-2CB00?","answer":"The dimensions are 0.115m depth, 0.097m width, and 0.111m height. It is an open-frame (IP00) component for cabinet mounting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EM5003-2CB00","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/4EM5003-2CB00 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}}