Here I present the fakes bought on Ebay
LM338K - (National semiconductors) fake
click on image to enlarge
TO-3 casing was carefully opened on a lathe
worst fake I've ever seen,
very thin wires from contacts to silicon
The LM338 is the 3-terminal adjustable positive voltage
regulator and is capable of supplying in excess of 5A over a
1.2V to 32V output range.
This regulators are exceptionally easy to
use and require only 2 resistors to set the output voltage.
Read more in a data-sheet
This fake have a "built-in fuse" which burn at approx 2A of electrical current, the reason is to thin bonding wires from contacts to silicon, so that wires are some kind of a fuse.
In the picture above you can see the bonding wire that has blown!
Original regulators are capable to supply at least 5A and a lot of dissipation, but this fake is capable less than 2A of current and small dissipation.
When exceeds the current, then it die ingloriously.
I suggest all buyers on eBay, not to give feedback before testing the product!
If the product is bad or fake, give negative or neutral feedback to the seller and request a refund!
... to be continued!