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May 1998

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Subject:
Re: Maximum FR4 operating temperature
From:
"<Jason M. Smith>" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 11 May 1998 08:47:16 -0400
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I've always used a max temp of 110 C as a topside board temp.





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Subject:  [TN] Maximum FR4 operating temperature








I have an application with a maximum ambient temperature of 70 °C.  I am
using copper planes on FR4 to help cool some power resistor leads.  The
copper planes can hit 115 °C.  Is this a problem?  Is there a rule of thumb
on how hot FR4 can continuously be operated at?

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