Filled with the lead?
Vias?
Clad Copper thickness?
Plated Copper thickness of the hole by Class 1, 2 or 3?

Lots of questions to look at. I don't know of any charts.
You could calculate this to a certain condition by the circumference of the
nominal hole size, then by the thickness of the board. This would give you a
flat pattern of this area (X and y) then use the standard IPC current charts
from there.

Roland Estrada CID
Lockheed Martin - Dallas

-----Original Message-----
From: Geoff Layhe [mailto:[log in to unmask]]
Sent: Wednesday, October 10, 2001 8:41 AM
To: [log in to unmask]
Subject: [TN] current carrying capacity of PTH


Hi All,
Does anyone have information such as formula, graphs etc  regarding current
carrying capacity of plated through holes?

TIA
Geoff Layhe
www.lamar-uk.co.uk


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