Identifying MOSFET "03 GUB 7X1V03" or "02 GUA 6X4H06"

[boardbread]

Hello! I have these MOSFETs used on a desktop motherboard, the name of the motherboard will not be helpful, because it is quite rare and doesn't have schematics. They are used in a power rail and have very unusual metallic package, I've never seen anything like this. Could you help me identifying these, or at least identify their package?

[piernov]

PE600BA marking code is F1, unrelated.

02 should be PR802BA33.
03 should be PR804BA33.

[R_J]

The GUB might be PE600BA not sure about the GUA

[piernov]

PE600BA marking code is F1, unrelated.

02 should be PR802BA33.
03 should be PR804BA33.

[boardbread]

PE600BA marking code is F1, unrelated.

02 should be PR802BA33.
03 should be PR804BA33.

Thank you very much! I was just going to write, that by looking at PE600BA I found that markings are very similar and image-searched for another MOSFETs from this manufacturer. Then I found their article about PowerFET package that looked exactly like my MOSFET and found the same PR802BA33 and PR804BA33 that you found!

I wonder, how did you found these? Was it the similar process, or you have more complete SMD markings database?

[piernov]

These are typical UNIKC/NIKO-SEM markings. UNIKC datasheets usually contain marking informations, but it's not necessarily easy to look them up.

These were not on our list previously but SMDFlea added them already : https://www.badcaps.net/forum/troubl...86#post1672286

If you look on Google with search strings similar to :
"UNIKC" "此产品代码为" "<marking code>"
or :
"UNIKC" "产品代码" "<marking code>"

Replacing <marking code> with the characters in the top left, then you can sometimes find the datasheet for them.
PR802BA33 did show up like that.

PR804BA33 did not, but I looked for other parts in the same family. Ended up finding PR812BA33 then PR804BA33.
Confirmed PR804BA33 with the pictures and datasheet found at LCSC. This UNIKC datasheet does not contain the string "产品代码" (only a picture of the marking information) so it could not show up in a search. Thanks for being consistent…

[R_J]

Those look like the right ones; I was getting close