I have 8 pairs of K1058/J162 bought in supposed trustable shop and supposed paired too.
I bought them long time ago, more than one year.
Now I opened the drawer to use those MOSFETS in a project and what I see is no signal of pairing (no sticks or any sign visible) and lots of doubts if they are genuine or not.
The marks are not engraved and theres no brand (Hitachi, toshiba, renesas or whatever)
This is a picture. The scratches in the K1058 has been done by myself checking they were not engraved.
What do you think about?
Do you know any testing circuit to match them?