Electronics > Beginners
Chinese relay module - reliability???
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Connecteur:
There's usually a tier of ridiculously low prices. These are likely a scam to collect your money and ship you nothing.  But there is intense competition for sales, and you can often get good quality for very low prices.
Geoff-AU:
80% of the product for 20% of the price.

Just gotta ask yourself which 20% they've left out. 

Personally, I'll buy from a proper channel like Element14 or Digikey if it NEEDS to work. 

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