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i won't buy chinise parts from aliexpress or ebay
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Psi:
Buying crystals from aliexpress sounds like a terrible idea.
As i said before, choose your battles.
wraper:

--- Quote from: Psi on February 18, 2020, 11:50:48 am ---Buying crystals from aliexpress sounds like a terrible idea.
As i said before, choose your battles.

--- End quote ---
And why do you think buzzers will be any different? Also SMT piezo buzzer is not nearly $2 at digikey unless you want to go for expensive option. And here you go, almost as cheap as your $3 for 10 and has datasheet (BTW there are actually none on aliexpress that match your description) https://lcsc.com/product-detail/Buzzers_KELIKING-KLJ-1625_C201041.html
Psi:

--- Quote from: wraper on February 18, 2020, 12:25:44 pm ---And why do you think buzzers will be any different?

--- End quote ---

Mainly because crystal are a precision part. If the frequency/stability is off your product may have serious problems.
but if the piezo beeper frequency is a little off, or a little quieter than normal, it's not usually a problem.
If a crystal fails your product stops dead, if a beeper fails your product just doesn't beep any more.

The piezo beeper was just an example i ran into 3 years ago
This was the style/footprint of the buzzer i was ordering
https://www.digikey.com/product-detail/en/murata-electronics/PKLCS1212E40A1-R1/490-5262-1-ND/1992371

I dont think LCSC exited back then, or if it did i didnt know about it.
wraper:

--- Quote from: Psi on February 19, 2020, 12:24:39 pm ---
--- Quote from: wraper on February 18, 2020, 12:25:44 pm ---And why do you think buzzers will be any different?

--- End quote ---

Mainly because crystal are a precision part. If the frequency/stability is off your product may have serious problems.

--- End quote ---
Frequency stability was not a problem. They were mechanically damaged internally. Conductive adhesive between crystal and package broke.
nigelwright7557:
"Save a penny, lose a pound"
"Buy cheap, buy twice"
etc etc

Learned my lesson years ago with ebay and/or Chinese parts.
Always buy from Farnell or RS Components now.
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