cheap UCD "500 watt" modules on eBay

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Chances are that they are more reliable than the Hypex stuff itself. I had no less then 5, yes 5 Hypex modules that literally went up in smoke. Two UCD700 modules exploded. The second was a replacement by Hypex of the first one. Two years later the other UCD700 channel went out with a big bang as well. Alle happened when idling. One plate amp went up in smoke while idling, one power suplly made a loud his and pop and stopped working. Not in my lifetime I will buy anything from Hypex again, it's highly dangerous stuff if you ask me. I would not let anything from Hypex in my outlet while away from home.
 
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I have fixed many ucd400 modules....the fets blow after heavy use and are replaceable....the smps have that one tiny cap that eventually goes bad, but I would not hesitate buying Hypex. The NCore are not fixable as far as I can determine, but the ucd400 are a great deal.

I cannot say for these fake UCDs