Toroidal Wound Ferrite Core for Power Transformers from China
A toroidal-shaped wound core made from ferrite material, pre-wound with copper magnet wire, designed specifically for incorporation into high-efficiency power transformers used in consumer electronics. It falls under HTS 8504.90.96.42 as a wound core intended for transformer assembly, featuring a closed magnetic path to minimize electromagnetic interference.
Duty Rate — China → United States
Rate breakdown
Import Tips
• Verify core specifications including winding turns, wire gauge, and material composition match transformer incorporation requirements to avoid reclassification as finished inductors
• Provide manufacturer datasheets proving the core is wound and solely for transformer assembly, as incomplete documentation often leads to duty reassessment
• Check for restrictions on electrical components from certain origins; declare insulation class and voltage rating accurately to prevent holds