Ferrite Bead Core for EMI Suppression
Small cylindrical ferrite beads used on cables as common-mode chokes in power converters to suppress electromagnetic interference. Classified under HTS 8504.90.96.30 as ferrite inductor/transformer parts for static converters. Effective at frequencies 1 MHz to 1 GHz.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If considered electrical insulators
Purely capacitive suppression devices might classify differently from inductive ferrites.
If sold as complete ferrite bead inductors
Assembled/wound versions classify as finished inductors under 8504.50.
If for use in measuring instruments
EMI suppression components integral to test equipment move to Chapter 90.
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Import Tips & Compliance
• Specify impedance vs. frequency curves in documentation to prove inductive function
• Ship in anti-static packaging to prevent damage claims during customs inspection
• For clip-on beads, verify they qualify as parts vs. accessories (different treatment)
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