TECHNET Archives

May 1998

TechNet@IPC.ORG
Options: Use Monospaced Font
Show Text Part by Default
Condense Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Mime-Version:
1.0
Sender:
TechNet <[log in to unmask]>
Subject:
Re: Maximum FR4 operating temperature
From:
Dieter Beisiegel <[log in to unmask]>
Date:
Mon, 11 May 1998 15:02:06 +-200
Content-Type:
multipart/mixed; boundary="---- =_NextPart_000_01BD7CED.C580FC20"
Reply-To:
"TechNet E-Mail Forum." <[log in to unmask]>, Dieter Beisiegel <[log in to unmask]>
Parts/Attachments:
text/plain (528 bytes) , application/ms-tnef (1662 bytes) 
Hi Sam,
according to UL746 (?) the temperature limit for FR4 is 130 ºC.
Kind regards,
Dieter

----------
From:   Sam Mollet[SMTP:[log in to unmask]]
Sent:   Monday, 11 May, 1998 14:25
To:     [log in to unmask]
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?

ATOM RSS1 RSS2