{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EM5318-4DB00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EM5318-4DB00","canonicalUrl":"https://aoctrl.com/siemens/4EM5318-4DB00","factsUrl":"https://aoctrl.com/api/mcp/products/4EM5318-4DB00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIDAC smoothing choke, 1-phase, 20A DC max, 600V, 12mH, IP00, screw/tab terminals.","salesMarkdown":"It operates at 600 V and provides 12 mH of inductance. The part is an open-frame design (IP00) with screw-type and tab terminals for the main circuit connection. Total power loss sums to 50 W — 48 W in the coil and 2 W in the iron core — at a rated ambient temperature of 40 °C. Thermal class B per IEC 60085 means the insulation system withstands a hot-spot temperature of 130 °C, so it handles sustained DC ripple without accelerated aging. The 20 A maximum DC rating sets the absolute ceiling; the 18 A rated value is the continuous design point for a DC bus or DC-link application. At 12 mH, this choke smooths current ripple from a single-phase rectifier or DC supply feeding a drive or converter. The screw/tab terminals accept ring lugs or fork terminals; plan for a 0.129 m depth, 0.151 m width, and 0.151 m height footprint when laying out the panel. ## Deployment context This choke belongs in a DC power circuit — typically the DC link of a variable-frequency drive, a DC motor drive, or a battery charger. The 12 mH inductance and 20 A rating suit single-phase rectifier outputs where ripple reduction is needed to protect downstream capacitors or to meet conducted-emission limits. The screw/tab terminals simplify field wiring with standard crimp lugs.","metaTitle":"Siemens SIDAC 4EM5318-4DB00 Smoothing Choke, 20A DC, 600V","metaDescription":"Siemens SIDAC 4EM5318-4DB00 smoothing choke, 1-phase, 20A DC max, 600V, 12mH, IP00, screw/tab terminals. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.129m","Width":"0.151m","Height":"0.151m","Maximum":"20A","Rated Value":"18A","Phase number":"1","Energy content":"2.4W","Type of voltage":"DC","lifecycle_stage":"mature","Product brand name":"SIDAC","Product designation":"Glaettungsdrossel","Protection class IP":"IP00","Inductivity rated value":"0.012H","Power loss [W] of the coil":"48W","Operating voltage rated value":"600V","Ambient temperature rated value":"40°C","Power loss [W] of the iron core":"2W","Thermal class acc. to IEC 60085":"B","Product function windings in parallel selectable":"No","Type of electrical connection for main current circuit":"screw-type terminals / tab terminals"}},"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=2799&mlfb=4EM5318-4DB00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EM5318-4DB00/alternatives.json"},"ai":{"faq":[{"question":"What is the 4EM5318-4DB00 used for?","answer":"It is a smoothing choke (DC-link reactor) for single-phase DC circuits, rated 20 A max, 600 V, 12 mH. It reduces current ripple from a rectifier or DC supply to protect downstream components and improve power quality."},{"question":"Where can I buy the 4EM5318-4DB00?","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."},{"question":"What are the key specifications of the 4EM5318-4DB00?","answer":"1-phase, 20 A DC max, 18 A DC rated, 600 V operating voltage, 12 mH inductance, IP00, screw/tab terminals, 50 W total power loss at 40 °C ambient, thermal class B."},{"question":"Does the 4EM5318-4DB00 require an enclosure?","answer":"Yes. The IP00 protection class means it has no built-in ingress protection. It must be mounted inside a panel or cabinet that provides the required environmental sealing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EM5318-4DB00","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/4EM5318-4DB00 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}}