9 AliExpress Components You Should Never Use in a Product Published on August 19, 2026 AliExpress is a great resource for a wide variety of Chinese-made components, but you have to be careful about the quality of what you actually get. One of them gets sold as a humidity sensor when there’s no humidity sensor inside it. Another one is a fire risk with a label claiming triple the capacity physics allows. The worst part is that a counterfeit component almost never fails on the day you solder it down. It fails once your product is in a customer’s hands, and at that point you’re paying for a whole production run over a two dollar part.