{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU4521-0CD00-0B","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU4521-0CD00-0B","canonicalUrl":"https://aoctrl.com/siemens/4EU4521-0CD00-0B","factsUrl":"https://aoctrl.com/api/mcp/products/4EU4521-0CD00-0B","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIDAC output reactor, 3-phase AC, 400V, 111A max, 0.4 mH, 6.4 kHz switching frequency, IP00, flat-type terminals.","salesMarkdown":"## What this output reactor does The Siemens SIDAC 4EU4521-0CD00-0B is a 3-phase output reactor (output choke) for variable-frequency drive installations. It sits between the drive output and the motor, filtering the PWM carrier to reduce voltage spikes, limit motor bearing currents, and extend cable runs. Rated for a 6.4 kHz switching frequency and a maximum continuous current of 111 A, it handles the output of a 400 V-class drive in the 75–100 kW range depending on duty cycle. The 111 A maximum rating is the thermal limit at 40 °C ambient — derate above that. The 0.4 mH inductance is a common value for motor cable lengths up to about 150 m on a 400 V drive; longer runs typically need a higher inductance reactor. The 6.4 kHz switching frequency matches most modern IGBT drives; if your drive runs a higher carrier frequency, the core losses increase and you may need to derate current or step up to a reactor rated for that frequency. Thermal class H insulation means the winding can handle 180 °C hot-spot temperature — adequate for the reactor's own losses plus heat soak from the drive cabinet. ## Physical integration and termination The reactor measures 0.46 m wide by 0.43 m tall by 0.29 m deep — a substantial block that needs floor or back-panel mounting, not a DIN rail. IP00 means no enclosure; it must live inside a cabinet with at least IP2X protection. Main circuit connections are flat-type terminals, designed for busbar or cable lug termination — not spring-cage or screw-clamp. Plan for M8 or M10 ring lugs and adequate bending radius for the incoming motor cables.","metaTitle":"Siemens SIDAC 4EU4521-0CD00-0B Output Reactor, 111A, 0.4 mH","metaDescription":"Siemens SIDAC 4EU4521-0CD00-0B output reactor. 3-phase, 400V, 111A max, 0.4 mH, 6.4 kHz switching frequency. IP00, flat terminals. Mature lifecycle; sourced to order. Request quote","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.29m","Width":"0.46m","Height":"0.43m","Maximum":"111A","Minimum":"0Hz","Rated Value":"6 400Hz","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","Product brand name":"SIDAC","Product designation":"output reactor","Protection class IP":"IP00","Inductivity rated value":"0.0004H","Ambient temperature rated value":"40°C","Thermal class acc. to IEC 60085":"H","Type of electrical connection for main current circuit":"flat connector"}},"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=143235&mlfb=4EU4521-0CD00-0B","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU4521-0CD00-0B/alternatives.json"},"ai":{"faq":[{"question":"What is the lead time for 4EU4521-0CD00-0B?","answer":"We source this reactor to order against an RFQ. Availability and current lead time are confirmed at quote time — submit a request and we will check our network of stocking locations."},{"question":"What are the physical dimensions of 4EU4521-0CD00-0B?","answer":"The reactor measures 0.46 m wide by 0.43 m tall by 0.29 m deep. It requires floor or back-panel mounting — not DIN-rail compatible."},{"question":"What compliance documentation is available for 4EU4521-0CD00-0B?","answer":"The reactor is designed to EN 61558-2-20 (safety of transformers, reactors, and power supply units) as noted in the spec string. For RoHS, REACH, and UL documentation, request the current manufacturer declarations with your RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU4521-0CD00-0B","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/4EU4521-0CD00-0B 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}}