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A question about one way resistors.

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Posted by ukmp on August 5, 2008, 11:47 am
Are they supposed to get seriously hot when connected to a twenty watt
solar panel feeding in to 12v batteries.Total amps from all other panels
approx 4.5


Posted by bealiba on August 5, 2008, 1:22 pm

One would suppose that you are talking about diodes.

If you mean too hot to touch, then you are headed for failure.

Posted by ukmp on August 5, 2008, 5:42 pm
 bealiba@gmail.com wrote:

Well i can hold it between my fingers but it feels quite hot.
Yes i meant diode-sorry.

Posted by spaco on August 5, 2008, 7:51 pm
 Since you mean diode, it depends upon the rating of the diode.  If it's
supposed to have a heat sink, does it have one?

   UL says that "too hot to hold your hand on" is anything over 137
degrees F.  Just about any power diode should be able take 50 degrees C
rise.  That's about 122 degrees F.
   You decide.

Pete Stanaitis

ukmp wrote:

Posted by John Bachman on August 5, 2008, 10:38 pm
 One more piece of information that you can use.  Cooler = longer life.
Heatsink 'em if you can.



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