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| Old tantalum capacitors (solid type) Would you use them? |
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| David Hess:
AVX has a paper about field crystallization as well. But the various papers I have read all agree that it only applies to higher voltage (25 volts and greater) parts and I am not convinced that proper derating would not allow self healing to handle these defects. I like T3sl4co1l's idea about monitoring noise; I will have to try that. So far I just burn NOS (new old stock) solid tantalum capacitors in for a couple days while monitoring leakage current as shown below. Epoxy packaged solid tantalum capacitors (but probably not hand soldered leaded parts) suffer from stress induce defects when heated during soldering and perhaps over the long term with humidity changes. These defects can be cleared after soldering during a separate burn in stage. Check out this video this video from Kemet at about 34 minutes: Also, is there any way to include a video link without embedding it??? |
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