Talk:Thermal resistance in electronics

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Here it says

   RθJC = 1.5 K/W (for a typical TO-220 package)
   RθB = 0.1 K/W (a typical value for an elastomer heat-transfer pad for a TO-220 package)

I think the values ar more like 100K/W - 10K/W. Here is an example http://www.ortodoxism.ro/datasheets/philips/BD139-16.pdf I'm trying to find one that has those properties.

No, 1.5K/W is OK: http://www.st.com/stonline/products/literature/ds/10073/stb200nf04.pdf I've seen a TO-220 regulator one with 3K/W also. The one in BS129-16.pdf has a lower power case style. Kallog 13:24, 24 June 2007 (UTC)