According to IPC-SM-782, for a 1206 chip resistor (RLP103) the X dimension
is 1.6 max, however if you go into the on-line calculator and select RLP103A
the X dimension is 1.8 max.  Has the revision to 782 been completed to Rev.
B?  If not, how can a registered land pattern have changed?  Is this what
RLP103A means?  In the book RLP103 has no suffix after it, however it is
suggested that if you are creating a wave soldered device that you add 'W'
as a suffix.  I am doing some preliminary article research into the problems
with creating CAD parts and have stumbled across this and was wondering what
is up with the land pattern standards.  Thanks.

Mark Ross
Project Engineer
Donnelly Electronics

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