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July 2002

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Subject:	Re: Via Size
From:	Tom Garman <[log in to unmask]>
Reply To:	(Designers Council Forum)
Date:	Sun, 7 Jul 2002 10:58:40 -0400
Content-Type:	text/plain
Parts/Attachments:	text/plain (50 lines)

Hi Karthik;
I determine the "equivalent" trace width by 3.14XR^2. Then use the charts in
ipc-2221. The nominal plating in the hole should be halfway between 1 oz and
1/2 oz. use the chart for inner layers. Not very scientific, but I haven't
had any of them smoke yet.

Regards;
Tom Garman

----- Original Message -----
From: "Karthik, P.V.S. (IE03x)" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, July 04, 2002 7:54 AM
Subject: [DC] Via Size


> Hi All,
>
> I would like to know if there are any calculators/documents/standards for
> selecting/calculating the via size for a particular current rating ?
>
> Karthik P.V.S
>
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