{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4EU4321-4BA00-0A","brand":"Siemens","brandSlug":"siemens","productSlug":"4EU4321-4BA00-0A","canonicalUrl":"https://aoctrl.com/siemens/4EU4321-4BA00-0A","factsUrl":"https://aoctrl.com/api/mcp/products/4EU4321-4BA00-0A","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS commutating choke, 4EU4321-4BA00-0A, 3-phase AC, 750V, 710A max / 639A rated, 50Hz, IP00, flat-type terminals.","salesMarkdown":"The Siemens 4EU4321-4BA00-0A is a commutating choke (line reactor) for converter applications — three-phase AC, rated 750 V, 50 Hz, with a maximum continuous current of 710 A and a rated current of 639 A. The 0.077 mH inductance limits di/dt and reduces harmonic distortion on the line side of a variable-frequency drive or DC drive converter. The 710 A maximum (639 A rated) at 750 V AC three-phase sets the envelope: this choke is sized for a 400–690 V class drive with a nominal output current in the 600–700 A range. The DC rated current of 870 A tells you it can also sit on the DC link of a converter, not just the AC line side, which is useful for retrofit or dual-use designs. The 488 W coil loss plus 283 W iron core loss (771 W total at rated conditions) must be dissipated — the IP00 enclosure means it's open-frame, intended for cabinet mounting where forced air or natural convection handles the heat. Thermal class H insulation means the winding can sustain 180 °C hot-spot temperature without degradation, which is a margin above the 40 °C ambient rating. Dimensions: 0.460 m wide × 0.435 m high × 0.265 m deep. That's a substantial footprint — roughly 46 cm × 43.5 cm — so it needs a dedicated mounting plate or a large DIN-rail backplate section. IP00 means no ingress protection — mount inside a cabinet rated to the environment, not in a washdown zone or outdoors.","metaTitle":"Siemens 4EU4321-4BA00-0A Commutating Choke, 710A 3-Phase","metaDescription":"Siemens 4EU4321-4BA00-0A commutating choke for converters. 710A max, 639A rated, 750V AC, 3-phase, 50Hz, IP00. Mature lifecycle; quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Line/Load Reactors"],"specifications":{"Depth":"0.265m","Width":"0.46m","Height":"0.435m","Maximum":"710A","Rated Value":"639A","Phase number":"3","Type of voltage":"AC","lifecycle_stage":"mature","at DC rated value":"870A","Product designation":"Kommut.-Drossel f. Stromrichter","Protection class IP":"IP00","Inductivity rated value":"0.000077H","Power loss [W] of the coil":"488W","Operating voltage rated value":"750V","Ambient temperature rated value":"40°C","Operating frequency rated value":"50Hz","Power loss [W] of the iron core":"283W","Thermal class acc. to IEC 60085":"H","Type of electrical connection for main current circuit":"flat connector","Relative inductive drop in voltage on the measurement level current, voltage and frequency":"4%"}},"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=161502&mlfb=4EU4321-4BA00-0A","alternativesUrl":"https://aoctrl.com/api/mcp/products/4EU4321-4BA00-0A/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of 4EU4321-4BA00-0A?","answer":"Three-phase AC commutating choke rated 750 V, 50 Hz, with a maximum current of 710 A and a rated current of 639 A. Inductance is 0.077 mH with a 4% relative inductive voltage drop. DC rated current is 870 A. Thermal class H insulation, IP00 enclosure, flat-type terminals."},{"question":"Where can I buy 4EU4321-4BA00-0A and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price is published here. Submit an RFQ for a firm commercial offer."},{"question":"Will 4EU4321-4BA00-0A drop into a panel specified around 3RV6011-0CA10 without rewiring?","answer":"No — the 3RV6011-0CA10 is a Siemens SIRIUS motor-protective circuit breaker (45 mm wide, DIN-rail mount, screw terminals). The 4EU4321-4BA00-0A is a 46 cm wide commutating choke with flat-type terminals, requiring busbar or lug connections and a mounting plate. These are different form factors and connection styles; a panel designed for the breaker would need significant rework to accept the choke."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/4EU4321-4BA00-0A","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/4EU4321-4BA00-0A 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}}