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Tube core RH series emi suppression ferrite bead tube core commonly used for round cable for wire winding to get the anti-interference efficiency at high working frequency for application, especially at 1MHZ-500MHZ is the best condition, to fitted cable diameter from 1mm to 20mm.
EFD core EFD series MnZn transformer core are commonly used for Auxiliary powr transformer,main power transformer,choke coils and various kinds of electronic instruments, etc. It has high permeability, low core loss factor, and low price and High Frequency.This EFD core is made by MnZn material which permeability from 2000 to 15000.