Electronics > PCB/EDA/CAD

Knock off chips?

(1/3) > >>

wadmancpu:
Hello, I've been buying some voltage controller qfn chips from ebay and the last batch seemed mostly defective. These are ISL9860 chips allegedly made by Intersil. I ordered from another supplier and the print on them is much brighter and clearer, even a bit of a different color. I was wondering how many knock offs of components are floating around out there and how many of you have run across them? Not saying for sure that these are but it certainly looks suspicious. Thanks all.

DerekG:

--- Quote from: wadmancpu on March 17, 2019, 02:51:23 am ---Hello, I've been buying some voltage controller qfn chips from ebay and the last batch seemed mostly defective.

--- End quote ---

There is an entire industry in China that de-solders components from old PCBs & then resells them as new, often with no testing taking place to confirm the component is still operational.

There is also a large industry that re-numbers lower spec components as higher spec components. This is particularly prevalent in the high voltage arena of MOSFETS, transistors & voltage suppressors.

You can only be guaranteed of avoiding these "grey" parts by buying direct from an authorised supplier.

james_s:
Yet another industry takes large quantities of useless obsolete ICs and relabels them as completely different much more useful parts. Sometimes you can find a bargain on genuine parts and sometimes clone parts are quite good. The problem is you can never tell what you're getting until you get it. For hobby projects I don't worry about it too much but if I were producing items for sale I'd buy from a reputable distributor.

Warhawk:

--- Quote from: james_s on March 17, 2019, 03:57:27 am ---Yet another industry takes large quantities of useless obsolete ICs and relabels them as completely different much more useful parts. Sometimes you can find a bargain on genuine parts and sometimes clone parts are quite good. The problem is you can never tell what you're getting until you get it. For hobby projects I don't worry about it too much but if I were producing items for sale I'd buy from a reputable distributor.

--- End quote ---

My hobby time is so precious that I would not bother even thinking about buying any IC from eBay or other sources know for counterfeits.  ;)

Gyro:

--- Quote from: wadmancpu on March 17, 2019, 02:51:23 am ---I was wondering how many knock offs of components are floating around out there and how many of you have run across them? Not saying for sure that these are but it certainly looks suspicious. Thanks all.

--- End quote ---

A forum search for 'fake' will yield the extent of this problem. Too numerous to mention.

Navigation

[0] Message Index

[#] Next page