Nois filter on power lines USB

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doofus32

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I am going to design connection for USB on the pc side, thats type A connector. I have an reference design that say that could be an Inductor or RF-drossel in seriers with the power lines. The value is 50@100MHz 3A.

I am a litle uncertain about what that mean about the value.
 

It's a chip coil (ferrite bead) with an impedance of 50 ohm at a frequency of 100MHz.
The maximum allowed current for the coil without damage is 3A . Take a look at the murata web site:
Type: e.g. BLM31PG500SN1K
Datasheet: **broken link removed**
 

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