Hello Carl,

"Automotive Environment" covers a broad collections or requirements.

Inside a car (where the people sit) you can get by with a good silicon
based conformal coating from Dow or others.

Outside on the engine in the splash zone you will need something that
does not allow quick diffusion of water in a gas form or other nastiness
such a Sulfur gas.  You had best ask your local conformal coating guy
for recommendations after you understand what you are protecting
against.

The safest is to switch to a metal housing with epoxy sealed mating
surfaces, a sealed connector and a Goretex relief valve.  This is what
DCX seems to like in their under hood electronics.

Best Regards,
 
eric
 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Carl VanWormer
Sent: Tuesday, August 05, 2008 1:34 PM
To: [log in to unmask]
Subject: [TN] Looking for Potting Compound guidance

Our customer has requested that our product be "potted" to help it
survive longer in an "automotive" environment.  Our module is in a
plastic box (black ABS, 80 degree C), and controls a small diesel engine
in an enclosed area.  I'm looking for suggestions for a good potting
compound that is:
1.  "right for the job"
2.  low cost
3.  easy to use
4.  not hazardous
5.  makes sense to use in relatively small batches (100 units at 5
ounces each)

Can any TechNetters suggest potting compounds that they are happy with?
Fatherly guidance and old war stories will be greatly appreciated.

Thanks,
Carl


Carl Van Wormer
Cipher Systems
1800 NW 169th Place, Suite B-100
Beaverton, OR  97006
Phone (503)-617-7447 extension 20    




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