How to know parameters of unknown ferrite ring?

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ALERTLINKS

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I have bought few ferrite rings for car booster power supply or to use in class d amp output filter. But as data is not available, how can i estimate about power ratings and max frequency, it can support.
Outside diameter is 2.9 cm. inside diameter is 2 cm. width is 0.7 cm.
 

if you know the manufacturer of the bought ferrite rings , you can get the max power and frequency details.

otherwise , it is a difficult guesstimate for ferrites.
 

Hi,
I am sure you will be knowing it.
If it is not a BULK LOT PURCHASE by the local seller, their is always part number on the packing
And if you purchased it fro HALL ROAD, then :-D
 

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