Wound cores for incorporation into transformers
Electrical transformers, static converters (for example, rectifiers) and inductors; parts thereof: > Parts: > Other: > Other > Other parts: > Of transformers: > Wound cores for incorporation into transformers
Duty Rate (from China)
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
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]
Products classified under HTS 8504.90.96.42
Toroidal Wound Ferrite Core for Power Transformers
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.
E-I Laminated Wound Core for Distribution Transformers
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.
Three-Phase Wound Iron Core for Industrial Transformers
A heavy-duty three-phase wound core constructed from grain-oriented electrical steel, pre-wound for direct incorporation into large industrial step-up transformers. It meets HTS 8504.90.96.42 criteria as a specialized wound component essential for transformer manufacturing, supporting high current loads.
High-Frequency Wound Amorphous Core for Switch-Mode Transformers
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.
Planar Wound Core for PCB-Mount Transformers
Low-profile planar wound core with thin copper foil windings, engineered for surface-mount transformers on printed circuit boards in telecommunications equipment. Classified in HTS 8504.90.96.42 for its wound design dedicated to compact transformer assembly, enabling high power density.
CRGO Wound Core for Audio Output Transformers
Cold-rolled grain-oriented (CRGO) steel wound core with bifilar windings for high-fidelity audio output transformers in professional sound equipment. Meets HTS 8504.90.96.42 as a precision-wound component for transformer incorporation, preserving audio signal integrity.
Nanocrystalline Wound Core for EMI Suppression Transformers
Nanocrystalline alloy wound core designed for common-mode EMI suppression transformers in power lines and switchgear. Falls under HTS 8504.90.96.42 specifically as a wound core for transformer incorporation, offering superior noise attenuation.
Multi-Strand Wound Core for Medical Isolation Transformers
Wound core using Litz wire multi-strand construction for patient-safe isolation transformers in medical equipment, preventing ground faults. Classified HTS 8504.90.96.42 for wound transformer cores, meeting IEC 60601 leakage current standards.
Shell-Type Wound Core for Instrument Transformers
Shell-type configuration wound core for precision instrument transformers measuring voltage/current in metering applications. HTS 8504.90.96.42 applies to its wound construction for transformer incorporation, ensuring high accuracy ratio.
Bobbin Wound Core for Automotive Ignition Transformers
Plastic bobbin-mounted wound core for high-voltage ignition coil transformers in vehicle engine management systems. Meets HTS 8504.90.96.42 as wound for automotive transformer incorporation, handling spark timing pulses.