I have been looking for an 0805 10uF ceramic capacitor rated for 100v. Mouser and Digikey have only appalling prices for such specs (50 cents/piece at 5k for example).
I recently made this shocking discovery on Aliexpress from a (somewhat) reputable dealer: https://www.aliexpress.com/item/33053004449.html
The price per item comes out to a few cents, and when comparing to U.S. prices, I am wondering if it's a scam. I can see one of these sellers selling 50v caps (much cheaper from U.S. distributors) as 100v caps, and my design blowing up with a bang.
Are these legit? I know it couldn't hurt to test them (100 of these is the same price as three from Digikey), but if there's a 0% chance they will work I would rather look elsewhere and not bother waiting for the shipping.
Perhaps this is an opportunity for someone who knows more than I do about ceramic capacitor manufacturing to explain the cost impact of increasing the capacitor's capacitance and voltage rating. Three factors that come to mind are more expensive materials, specialized design process, and lack of demand to produce economically in large batches. Are any of these remotely reasonable?