{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EM5308-1CB00","brand":"Siemens","brandSlug":"siemens","productSlug":"4EM5308-1CB00","canonicalUrl":"https://aoctrl.com/siemens/4EM5308-1CB00","factsUrl":"https://aoctrl.com/api/mcp/products/4EM5308-1CB00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIDAC series, smoothing choke (Glaettungsdrossel), 1-phase, 4EM5308-1CB00, rated 20A DC / 18A, 690V, 13mH, IP00, screw/tab terminals.","salesMarkdown":"The Siemens SIDAC 4EM5308-1CB00 is a 1-phase smoothing choke — a DC link reactor — designed to smooth current ripple on DC bus lines in drives, converters, and power supplies. Rated for a maximum DC current of 20 A (18 A rated continuous), it handles the steady-state load without saturating the core. The 690 V insulation voltage means it can sit on a 400–480 VAC rectified DC bus with margin; the 13 mH inductance (0.013 H) gives enough filtering to knock down the switching-frequency ripple from a 6-pulse or 12-pulse rectifier. Total power loss runs 47.9 W (46.8 W coil + 1.1 W iron core), so plan for that heat in a ventilated enclosure — this is an open-frame IP00 part, no enclosure of its own. ## Where it lands in a panel At 151 mm wide × 151 mm high × 129 mm deep, this choke takes up a solid footprint on a mounting plate — not a DIN-rail clip-on. The screw-type and tab terminals accept ring lugs or fork terminals for the main DC circuit. Thermal class B per IEC 60085 means the insulation system is rated for a 130 °C hot-spot; the 40 °C ambient rating is the standard derating baseline. IP00 means no drip shield or finger guard — mount it inside a locked cabinet or behind a panel door.","metaTitle":"Siemens SIDAC 4EM5308-1CB00 Smoothing Choke, 20A DC, 690V","metaDescription":"Siemens SIDAC 4EM5308-1CB00 1-phase smoothing choke. Rated 20A DC, 690V, 13mH, IP00. Mature lifecycle. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.129m","Width":"0.151m","Height":"0.151m","Maximum":"20A","Rated Value":"18A","Phase number":"1","Energy content":"2.5W","Type of voltage":"DC","lifecycle_stage":"mature","Product brand name":"SIDAC","Product designation":"Glaettungsdrossel","Protection class IP":"IP00","Inductivity rated value":"0.013H","Power loss [W] of the coil":"46.8W","Operating voltage rated value":"690V","Ambient temperature rated value":"40°C","Power loss [W] of the iron core":"1.1W","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=204854&mlfb=4EM5308-1CB00","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EM5308-1CB00/alternatives.json"},"ai":{"faq":[{"question":"What are the key electrical ratings for 4EM5308-1CB00?","answer":"Rated for 20 A DC maximum (18 A continuous), 690 V insulation voltage, 13 mH inductance, and 47.9 W total power loss. Thermal class B, 40 °C ambient."},{"question":"Where can I buy 4EM5308-1CB00?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm position."},{"question":"What is the physical size of 4EM5308-1CB00?","answer":"151 mm wide × 151 mm high × 129 mm deep. It is an open-frame IP00 component, not DIN-rail mountable — requires a mounting plate inside a cabinet."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EM5308-1CB00","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/4EM5308-1CB00 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}}