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Re: Good IGBT List?
Original poster: "Barton B. Anderson" <bartb@xxxxxxxxxxxxxxxx>
Some semiconductor magazines will have articles regarding parts (good
parts vs. the cheap parts). It wasn't too long ago that I read an
article on a part where the manufacturer explicitly explained and
showed (with pictures) the difference between a good manufacturer
part and a cheap replica. It looks identical on the outside, but the
internal dies were like 70% smaller). I couldn't believe how poorly
the replica was made.
The familiar line "parts are parts" is not true in electronics. I
guess the term (equivalent or replica) means that it looks like the
original on the outside (but that's about it). I'm sure there are
true equivalents, but it may be worth an optopsy to be sure.
Take care,
Bart
Tesla list wrote:
Original poster: "resonance" <resonance@xxxxxxxxxxxx>
Another mistake experimenters make, in being economically frugal, it
to buy their semiconductors off E-Bay or from a surplus house. Many
of these are factory "seconds" that do not meet the normal
manufacturer's standards. Sometimes it's only cosmetic, but other
times it has flaws which will cause electrical failure.
I've seen people degrade manufacturers for bad products when they
have purchased "seconds" that failed.
Also, most Tesla experimenters are operating the IGBTs at or above
their rated values. This also can cause premature failure of the
semiconductor.
If you are on a tight budget you must be willing to accept
occassional failures.
Dr. Resonance
I would have to agree with Steve here. The only way you get to
reduce the number of failed semi's is through a better
understanding of how they work. Search the manufacturer's websites
for application notes, and detailed datasheets.
Having blown up many single IGBT modules worth upwards of $2000
each in my research, I have learned the hard way that the
manufacturers do not necessarily know everything either however.