Alternate Chinese supplier for A grade items - Page 1
Forum section: electronics / beginners

author: sairfan1
author_rank: Frequent Contributor
timestamp: February 14, 2020, 02:52:18 pm
content: As parts available on ebay and aliexpress from Chinese market are cheap but mostly they are B/C class, through they are good for hobby work but not for professional projects, i was looking at LoRa module at AliExpress its available for $4.5 but same moduels is priced at $19 on digikey/mouser that sounds really crazy, same is the case with ESP, on aliexpress i can found around $3 but on digikey it was listed $14One of my friend told me as parts available on ebay/aliexpress are B/C grade their performance is inconsistent for example different range for same module. I want to know is there some supplier/web site from China where i can buy A grade items at reasonable price?

author: mvs
author_rank: Frequent Contributor
timestamp: February 14, 2020, 07:14:54 pm
content: Quote from: sairfan1 on February 14, 2020, 02:52:18 pmOn ebay/aliexpress you can buy functional copies with similar or original part numbers. It has nothing to do with B/C class, they are just another products from another manufacturer.Look at lcsc.com, they do list a manufacturer and datasheet for most of their parts.

author: Jwillis
author_rank: Super Contributor
timestamp: February 15, 2020, 01:25:42 am
content: Although counterfeit components do exist which you should be aware of. Also you must be aware of recycled components. Most of the stuff you get on Ebay is factory surplus or warehouse rotation. Many component manufactures have facilities in China and have to get rid of surplus. And warehouses continually rotate the supply they have. Instead of just throwing it out or recycling it they try to sell it at cut rates through various vendors . This is common not only in China but around the world . With authorized distributors your more likely to have access to the most up to date components and usually are not that much more expensive then Ebay or other small market vendors.Will authorized vendors have the best ? In most cases that is true but remember they are only distributors and can receive components that may not be as good as they should be. Factories do make mistakes and only batch test , not every component they make gets tested . So occasionally some bad ones get into the market.Manufacturers will also down grade components that don't meet specifications. And remark those components if they fall into a different set of specifications .I recently had a long discussion with Digikey about some faulty components that they sold me. They do not test components before sale. So if they get a bad batch from the manufacturer they will not know it until a complaint is issued after sale. But they will replace faulty components no problem. Digikey also receives much of their stock from facilities in China. It's just the way it is. I know there will be people that will disagree but this information comes from the distributor and other various companies I have contacted.

author: sairfan1
author_rank: Frequent Contributor
timestamp: February 18, 2020, 09:32:04 pm
content: Yes, exactly i want to avoid used modules so that i do not have performance issues. is there some Chinese suppliers/web sites that you guys know

author: Jwillis
author_rank: Super Contributor
timestamp: February 18, 2020, 10:23:43 pm
content: I use Ebay simply because of shipping convenience. So I use the same vendors most of the time . I haven't had any problems with the stuff I get and always able to get answers to questions . I've used Banggood a fair bit with no problems as well. I'm not very particular about obsolescence most of the time because I'm not designing anything for a market . I just design and try ideas I have and if they don't work so be it.I don't use the Chinese web sites because most of them need translating and are difficult to navigate.But if you want the sellers I used off Ebay I can direct you to those.Your in Canada so you could tryhttps://leeselectronic.com/en/mostly geared towards audio . Vancouver BChttp://www.a1parts.com/surplus and new. Don't buy the RF generators .They're crap. Toronto Onthttps://www.justradios.com/Mostly geared to vintage audio but the parts are new. Scarborough OntFor newer released components and surface mounthttps://www.digikey.ca/?utm_adgroup=General&utm_source=google&utm_medium=cpc&utm_campaign=Brand_General_E&utm_term=digikey%20canada&productid=&gclid=EAIaIQobChMI8dzB9ZPc5wIVBB-tBh2FaQmsEAAYASAAEgIbWPD_BwE