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Peter BENSCH
Technical Moderator
March 6, 2026

Welcome @KhanhTran, to the community!

Since STDES boards are not products in production and are not offered for sale, only the design documentation available on the website is provided.

You are welcome to get in touch with your local distributor or sales contact who will help you realise your project if the quantity is large enough.

Hope that helps?

Regards
/Peter

Andrew Neil
Super User
March 6, 2026

@Peter BENSCH wrote:

STDES boards are not products in production and are not offered for sale,


But the Product Page  says,

"The STDES-SSR003V1 is a ready to use reference design that features a solid state relay. The reference design allows us to evaluate TN4050HP-12L2Y as a 40 A switch for automotive and industrial AC applications."
(my emphasis)

So what use is it if you can't buy it, and can't get the schematics?

A complex system that works is invariably found to have evolved from a simple system that worked.A complex system designed from scratch never works and cannot be patched up to make it work.
Peter BENSCH
Technical Moderator
March 6, 2026

Well, this is probably one of the tricks of marketing: a reference design is actually not a purchasable product, but something like a product study. The term "ready to use" is, in my opinion, somewhat unfortunately chosen. In many cases, the complete documentation (schematics, GERBER) can also be found with STDES boards, but in this case, the marketing has not made it available for unknown reasons.

I am sincerely sorry for not being able to give a more positive response.

Regards
/Peter