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F25 & F29 are perminvar ferrites and undergo irreversible changes of characteristic (µ increases and loss factors become much greater, especially at high frequencies) if subjected to strong magnetic fields or mechanical shock.
Data is derived from measurements 30mm x 19mm x 6.5mm toroidal samples for F19, F13 & F14.
Data is derived from measurements 14.5mm x 3.8mm x 12mm toroidal samples for F16, F25 & F29.
These values cannot be directly transferred to products of another shape and size.
The product related data can be taken only from the relevant product specifications.
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