E-I Laminated Wound Core for Distribution Transformers from Mexico
An E-I shaped silicon steel laminated core with precision windings, manufactured for integration into medium-voltage distribution transformers in electrical grids. Classified under HTS 8504.90.96.42 due to its wound construction specifically for transformer incorporation, optimizing flux density and efficiency.
Duty Rate — Mexico → United States
25%
Rate breakdown
9903.82.0925%Except as provided for in headings 9903.82.16, 9903.82.20–9903.82.26 and 9903.85.68, articles of copper and derivative aluminum and steel articles, as provided for in subdivisions (c)(vi)–(viii) and (xi) of U.S. note 16 to this subchapter
9903.05.900%Articles of aluminum, of steel or of copper or derivative aluminum or steel articles; passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans and cargo vans) and light trucks; parts of passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans and cargo vans) and light trucks; medium- and heavy-duty vehicles; parts of medium- and heavy-duty vehicles; wood products; patented pharmaceutical articles; and semiconductor articles, as provided in subdivision (f) of U.S. note 52 to this subchapter
Import Tips
• Include engineering drawings showing E-I lamination stack and winding configuration to confirm transformer-specific design during customs review
• Test for core loss specifications and provide certification, as substandard materials may trigger quality-based rejections or higher duties
• Bundle with transformer assembly invoices if imported as part of production kits to qualify for potential duty relief programs