E-I Laminated Wound Core for Distribution Transformers from China
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 — China → United States
35%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
9903.88.0125%Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [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