Genny,

 I have lived and breathed this part number stuff for about 20 years.

 I would bet your immediate reason for using a semi-intelligent part number
system is so you can find things. Most apps give you a big list and you need
to run down that list finding something.

 The second main use for the part number is having a unique ID that allows a
specific part with specific characteristics to be specified in a list(BOM).

 What folk do is merge these two requirements into a single semi-intelligent
part number. Problem is that naming system eventually needs to be
reorganized but since the part numbers are in use you are stuck. With two
people doing the "Naming" things also can run amuck.

 It does not have to be this way. What you can do depends on what existing
data system you have in place and how far outside the box you are willing to
go.

 Contact me off line bob <funny a in circle> kondner period com 

Thanks,
Bob Kondner
410-821-1315
Index Designs
Baltimore Maryland USA 21286

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Genny Gibbard
Sent: Thursday, August 26, 2010 4:04 PM
To: [log in to unmask]
Subject: [TN] Resistor part numbers

We use a semi-intelligent internal PN system.  To date, our resistors
are usually 5% or 1%.  For 5%, we use 2 sig digits plus a multiplier
digit for the value, plus a letter code to indicate size.  For 1%, we
use 3 sig digits plus a multiplier plus the letter code.  
We now have a requirement to make some 0.1% resistor part numbers.  We
are struggling with how to define it in our system.  The thought was to
do 4 digits plus a multiplier, but to add to the confusion, the parts
are 1K and 2K21.  This would mean the PN would have a number like 10000
for 1K and 22100 for 2K21.  
Does anyone have any other ideas?

Genny 

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