Three-Phase E-I Stacked Transformer Core from Mexico
Interleaved E-I shaped laminations stacked for three-phase power transformer cores, typically using CRGO steel. These pre-assembled stacks reduce manufacturing time when windings are added domestically. Falls under HTS 8504.90.96.38 as stacked cores for transformer incorporation.
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 already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Include phase configuration drawings and stack height specs to demonstrate three-phase transformer specificity
• Anti-dumping duties may apply to certain silicon steel cores from specific countries; check Commerce Department scopes
• Avoid bundling with yokes or frames, as that could shift classification to other transformer part subheadings