|WikiProject Physics||(Rated Start-class, Low-importance)|
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. --(unsigned edit was by ) Zuperman 2007-05-30T09:44:01
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)
Cleanup tag status
- I think the example calculation section is still over complicated. But yea apart from that. Kallog (talk) 01:49, 20 March 2010 (UTC)
The formula in the example does not match the formula with numbers substituted. The latter doesn't have deltaThs but has Rha. Also the concept of deltaThs is not clear. Hoemaco (talk) 07:27, 5 April 2011 (UTC)
- Agreed. DeltaThs from the formula is not in the example. More importantly, Deltahs shouldn't be in the equations anyway, as this is accounted for by Q*Rha (i.e. = the temperature drop across the heatsink). Comment that "THS appears to be undefined." in earlier paragraph may be eluding to this. — Preceding unsigned comment added by ASearcher (talk • contribs) 19:14, 20 March 2013 (UTC)
Requested move to Thermal resistance
Units are not consistent
Can anyone tell me why meters squared are included?
Keeping them would make calculations & understanding
so much easier.
But nobody else does that
except the thermal resistance page & the thermal conduction page.
The thermal conductivity page does not have meters squared
for thermal resistance or thermal conductance.
Peter Sheedy PS20100401@gmx.de