The remarkable new RF-suppressing impregnated soft plastic better than ferrite

[6SN7WGTB]

Just bought some chinese shyte which came with a USB cable.

It had the characteristic 'ferrite' moulded on to it.

Sawed it off and it's just soft plastic.

Or maybe it is an innovative class-leading RF-suppressing impregnated soft composite...?

[silverback]

possibly carbonyl iron added to the plastic or silicon rubber.

[6SN7WGTB]

Looking at it through a loupe I could not see any texture suggesting it may be metallic or crystalline.

In any event such a material would be a very poor substitute for a ferrite core - and doesn't the very usefulness of ferrite depend on the density of magnetic particles?

[T3sl4co1l]

Well no need to speculate, does a magnet stick to it or nah

[mag_therm]

Soft magnetic plastics have been used for 30 years in induction heating (Fluxtrol)
Also  other providers for UHF and in food industry etc.
Permeability is low ( 20 ~ 30 or so), but effectiveness can be gained back by the formability close to the conductor.
(Fridge magnets use the hard magnetic material.)

[6SN7WGTB]

Needless to say it is not magnetic at all...

[Neganur]

Ferrite is not supposed to stick to magnets, or?

[T3sl4co1l]

(They got scammed.)

(Or got what they expected, and didn't pay much for it either, I don't know.)

But suffice it to say, yes, there are people putting those on as solid moldings just to make it look right, and customers rarely know the difference -- or have the means to test.

Tim

[6SN7WGTB]

Came free with something but since it's chinese, knew it would be shyte, sawed it open, and sure enough the chinese are scamming us at every opportunity.