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Associate
January 26, 2026
Solved

Identify this part?

  • January 26, 2026
  • 2 replies
  • 711 views

Edited to place the image in the post - for easier viewing.


Hello,
This is my first time posting.
I am trying to find the P/N from the part's marking.
If you know it, please let me know.

Engraving: GP229

Guess: Schottky barrier diode STPS2L60 - 2A, 60V. Is that correct...?

If you have any information, please let me know. Thank you.

 

AndrewNeil_0-1769438378563.jpeg

 

Best answer by CXTURBO

Sorry for the late reply.
I obtained two candidate types and made a decision.
In the end, it appears that STTH112 was the correct answer.
STTH112 does not conduct current even at 1KV or reverse voltage, but STTH102 did.
Now I can install it with confidence.
Thank you for your advice.

2 replies

AScha.3
Super User
January 26, 2026

Hi,

marking could be ... GU

AScha3_0-1769416008969.png

Look, what it should do probably in the board : diode or ESD protection ?

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CXTURBOAuthor
Associate
January 27, 2026

Thank you for getting in touch.
I repair faulty power supplies, circuit boards, etc. that are entrusted to me by customers.
In this case, I needed this diode to repair an AC servo driver.
As I don't have a circuit diagram, I don't know its purpose (protection, ESD, etc.).
I plan to create a circuit diagram depending on the situation, but I was in a difficult situation as I couldn't install an uncertain part.
Is it likely that the SM6T200A mentioned in your comments is the P/N?
Also, is there a way to identify the P/N from the engraving?
Thank you in advance.

 

Please excuse any strange notation as I am using Japanese translation software.

CXTURBOAuthor
Associate
January 27, 2026

I'm sorry I don't really understand how to use it.
Regarding the STTH102/112, as advised by Peter, I'd like to remove the parts and measure them.
I'll comment once I've finished checking.
Thank you in advance.

Peter BENSCH
Technical Moderator
January 26, 2026

Welcome @CXTURBO , to the community!

You'll find the marking in the 2nd line, i.e. U12.

Unfortunately, the marking is ambiguous and could refer to either STTH102 (Utrafast 200V) or STTH112 (Utrafast 1.2kV) , which differ significantly from the blocking voltage and the forward voltage. For a successful replacement, you should therefore try to find out what the maximum voltage can be.

Regards
/Peter