Audio Equipment Step-Down Transformer from Mexico
18VA toroidal transformer for powering tube preamplifiers and small audio components, providing clean isolated 12V AC power. Classified under HTS 8504.31.40.35 for its low power rating below 40VA and audio-specific design with minimal electromagnetic interference.
Duty Rate — Mexico → United States
31.6%
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
• Specify toroidal vs EI core type affecting EMI performance; include ground isolation diagrams; verify audio frequency response characteristics if questioned