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Subject:
From:
"Stadem, Richard D." <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Stadem, Richard D.
Date:
Tue, 8 Mar 2016 22:24:42 +0000
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You are most welcome.
dean

-----Original Message-----
From: Datacom - Juliano Ribeiro [mailto:[log in to unmask]] 
Sent: Tuesday, March 08, 2016 12:38 PM
To: Stadem, Richard D.
Subject: RES: [TN] SAC x SN100C

Thank you Richard,

We need exchange the solder pot but the Lead Free solder is very expensive (SAC family).

Thank you for your answers

_____________________________
Juliano Bettim Ribeiro
DATACOM 
+55 (51) 8446-2135
+55 (51) 3933-3000
Ramal: 3484


-----Mensagem original-----
De: Stadem, Richard D. [mailto:[log in to unmask]] 
Enviada em: terça-feira, 8 de março de 2016 11:30
Para: TechNet E-Mail Forum; Datacom - Juliano Ribeiro
Assunto: RE: [TN] SAC x SN100C

Which SN100C? The properties of SN100C from one vendor such as Kester K100LD
are completely different than any SAC305, and also different from other
Sn100C alloys. It depends on the dopant added. I have used K100LD for many
military applications only because I became very familiar with it during
testing of its properties at the Navy testing site on a special project. It
has both drop shock and load cycling properties that are quite similar to
Sn63, and was selected by the Navy as a preferred alloy over the much more
brittle Sn100C alloys that are out there.
http://www.kester.com/kester-content/uploads/2013/03/Tin-Copper_Based_Solder
s-for_Electronic_Assembly.pdf
I have no financial interest or any other association with Kester. I am only
suggesting this alloy because it has proven to be a very good alternative if
you need a lead-free that has better wetting as well as an improvement in
the modulus of elasticity than Sn100C or, God forbid, SAC305. And it is much
less costly.
It has been several years since I qualified this alloy, however. There may
be many other new products out there. Just be sure you look at the cost and
some of the performance characteristics (or lack thereof). You need to
perform a good qualification based on the product you intend to use the
solder on. As an example, many SACxxx alloys simply will not fill the plated
through holes in an .093" thick PWB with any mass, as the SAC alloys do not
wet very well. There are many things to consider. These are not "minor
differences"; they can cause a huge difference in reliability, rework costs,
etc.
dean

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Datacom - Juliano
Ribeiro
Sent: Tuesday, March 08, 2016 5:34 AM
To: [log in to unmask]
Subject: [TN] SAC x SN100C

Hi to all,

 

What are the differences about SAC305/0307 vs SN100C (reliability criteria
and process specification)?

I read about SAC0307 and SAC305 and the article shown that SAC0307 is better
about Drop Shock but the SAC305 is better about Thermal Cycle. I would like
the same comparison about SAC vs SN100C.

 

Thank you a lot

_____________________________

Juliano Bettim Ribeiro

DATACOM 

ENGENHARIA DE PROCESSOS
Rua América Nº 1000 - Eldorado do Sul - RS CEP: 92990-000 
+55 (51) 8446-2135

+55 (51) 3933-3000

Ramal: 3484
 <mailto:[log in to unmask]> [log in to unmask]
<http://www.datacom.ind.br/> www.datacom.ind.br

 


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