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Old 6th June 2008, 02:09 AM   #1
aldovan is offline aldovan  Brazil
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Default Mica in Heatsink TO3 power transistor or no ?


I want know if the heat transfer is best with mica isolator or without it.
I do not need mica for electric isolation.
I will use in a TO3 package power transistor.

Thanks in advance,


PS: I will use termic paste.

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Old 6th June 2008, 03:20 AM   #2
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The lowest thermal resistance will be without the mica washer, so if you don't need electrical isolation, don't use it.
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Old 6th June 2008, 03:39 AM   #3
djk is offline djk
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Mica and grease is about 0.3*C/W, grease only is about 0.1*C/W
Candidates for the Darwin Award should not read this author.
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