High-Frequency Wound Amorphous Core for Switch-Mode Transformers from China
A compact wound core made from amorphous metal alloy, optimized for high-frequency switch-mode power supply transformers in computing devices. Falls under HTS 8504.90.96.42 as it's pre-wound specifically for transformer integration, reducing energy losses at frequencies above 20kHz.
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
• Provide frequency response test data proving high-frequency design, distinguishing from audio or low-frequency cores
• Label with amorphous alloy composition percentage, as alloy content affects duty calculations and origin rules
• Ship in anti-corrosion packaging; surface damage often leads to rejection as unfit for transformer incorporation