Genny,
It depends upon the type of Nylon being used.  In general Nylon is
hydroscopic and not a good choice for moisture rich environments.  Some
of the new compounds that have improved heat resistance are also more
moisture resistant, but still can cause problems.
If you are concerned only about post solder wash, this should not be an
issue, but you should make certain that the assembly is thoroughly
dried.  I hope that this helps.

Doug Erb
Senior FAE
Hirose USA
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Genny Gibbard
Sent: Wednesday, May 13, 2009 11:43 AM
To: [log in to unmask]
Subject: [TN] Nylon connectors - moisture sensitivity

We have been told that a surface mount nylon connector we use is
moisture sensitive, and should be treated as equivalent to level 5a.
This is the highest level we have ever seen on any component we have
used of any type.  I didn't think that a connector could be moisture
sensitive.  Not heat tolerant, yes - we have melted a few - but moisture
sensitive?  
What kind of damage can happen to a nylon connector from too much
moisture absorption?
Thanks in advance for your responses.

Genny 

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