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December 2011

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Subject:	Re: DFH : Design for Humidty
From:	Di Marcello Paul <[log in to unmask]>
Reply To:	(Designers Council Forum)
Date:	Mon, 12 Dec 2011 09:07:02 +0100
Content-Type:	text/plain
Parts/Attachments:	text/plain (1 lines)

Hi Dave,

We only usually specify the requirement of conformal coating for reduced intrinsic safety creepages and clearances.

Paul.

-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of Dave Schaefer
Sent: giovedì 8 dicembre 2011 20.49
To: [log in to unmask]
Subject: [DC] DFH : Design for Humidty

Anyone have experience determining when an Electronic Assembly requires added precaution against humidty ?

Are there any specifications which outline when an assembly must be conformal coated / potted / moisture sealed ?

I've designed many PCBs over the years for various Military and Automotive applications where specific environmental protection was required but this was always laid out in reference to a specific standard on the statement of work. In this case I simply have a requirement that the assembly remain functional at a certain humidty level.

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