At 12:30 AM 11/17/99 -0500, Sean wrote: >Does anyone have any info on the thermal conductivity of PCB material? >Roughly,does it conduct heat well or insulate it? I realize that it varies >greatly depending upon the material. Specifically, I am talking about FR4 >and possibly also phenolic materials (like cheapo perfboard and protoboard >is made of). My guess is that it is NOT a good conductor of heat (I seem to >remember somewhere that one of the materials commonly used for PCBs is >similar to the ablative heat sheild material used in the early US space >program?). These boards are usually epoxy filled with glass. They are not as good a conductor as metal, obviously, but not as bad as plastics. I would guess at a thermal conductivity of 0.1 in metric units. ================================================================ Robert A. LaBudde, PhD, PAS, Dpl. ACAFS e-mail: ral@lcfltd.com Least Cost Formulations, Ltd. URL: http://lcfltd.com/ 824 Timberlake Drive Tel: 757-467-0954 Virginia Beach, VA 23464-3239 Fax: 757-467-2947 "Vere scire est per causae scire" ================================================================