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Associate
August 22, 2026
Solved

ES and E marking on NUCLEO-F303RE

  • August 22, 2026
  • 3 replies
  • 17 views

I am using NUCLEO-F303RE board. I couldn't find ES and E marking in the product information of the datasheet. Does it mean it is not "ES" and "E" marked. can any one please confirm it.

Best answer by mƎALLEm

Ok,

As stated in the user manual of the board "ES" and "E" means the product is not yet qualified.

"ES" means Engineering Sample i.e. the product is in a qualification phase.

The datasheet provides information about qualified products. No need to provide that information in the datasheet.

If you have "STM" instead of "ES", that means your product is fully qualified. 

Hope that helps.

3 replies

AnuprashAuthor
Associate
August 22, 2026

@mƎALLEm  

  • ES = Engineering Sample
  • E = Engineering

I have added the snip below, which states ES or E marked cannot be used for qualification activities

 

 

cf8bf157-2d36-2b24-9270-ed96b5c7fb35.png

 

 

mƎALLEm
mƎALLEmBest answer
ST Technical Moderator
August 27, 2026

Ok,

As stated in the user manual of the board "ES" and "E" means the product is not yet qualified.

"ES" means Engineering Sample i.e. the product is in a qualification phase.

The datasheet provides information about qualified products. No need to provide that information in the datasheet.

If you have "STM" instead of "ES", that means your product is fully qualified. 

Hope that helps.

To give better visibility on the answered topics, please click "Best answer" on the reply which solved your issue or answered your question.
mƎALLEm
ST Technical Moderator
August 27, 2026

Hello  @Anuprash  and welcome to the ST community,



What do you mean by "ES" in the marking?

Please give an example. What marking do you have on your device? I have a doubt about the answer but I need to be sure ..

To give better visibility on the answered topics, please click "Best answer" on the reply which solved your issue or answered your question.