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Old 8th August 2012, 06:54 AM   #1
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Default Utsource fake??

Can anyone confirm whether Utsource.net sell fake transistors???
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Old 8th August 2012, 07:17 AM   #2
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I'm sure they do, whether they realize it or not.

If the US military can be duped into buying fake parts, it's almost a guarantee that a HK parts broker also buys/sells fake parts.

That said, I've always had excellent service from utsource and the parts have always worked, fakes or not.
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Old 8th August 2012, 08:44 PM   #3
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I bought Toshiba 2SK2013/2SJ313 from UT Source. They were fakes. They did not reply to my repeated mail asking for a replacement of parts only, even if I paid for shipping both ways. Whereas, prior to the purchase, they were very prompt in replying to my queries. Shame.
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Old 8th August 2012, 08:52 PM   #4
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I bought Toshiba 2SK2013/2SJ313 from UT Source, too. And they were not fakes (measured and tested, in compliance with datasheet).
People often declare parts to be fakes based only on visual examination, without proper testing. Many parts have been produced in different housings, depending on year of production and that causes confusion among users who weren't able or willing to execute serious testing or serious research (there are different datasheets for parts produced in different years).
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Old 9th August 2012, 01:38 AM   #5
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Iíve bought many hundreds of transistors, FETS and capacitors from HK based ebay stores and not a single fake in site.

Iíve had wrong parts suppled, wrong number of parts supplied and wrong batch numbers supplied but no fakes.

This whole fake transistor business is blown completely out of proportion.

By the wayÖ I donít consider an On Semi MPSA 42 for example a fake as long as you know you are getting an On Semi device and not a Motorola!
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Old 9th August 2012, 10:25 AM   #6
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Utsource do supply fakes or should I rather say second source. I had this with toshiba drivers. The parts supplied looked exactly like the original toshiba down to the markings. The only suspicion was the too shiny legs of the components. Well they did turn out to be the parts in question but they were not from toshiba, they were manufactured in Hong kong and said to be second source, the problem being that very little of them in a batch of 500 came close to datasheet specs. They do work but will not perform as well as suggested by datasheet info. When I finally located real toshiba, less than 1 percent of them were slightly off and all better than the supposed components from Hong kong. KEC also manufacture the pair, nowhere close to datasheet specs, much slower.
Please note that toshiba does not supply licencing for second source manufacturing for parts still in current production.
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Old 9th August 2012, 10:35 AM   #7
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Quote:
Originally Posted by triplej View Post
Iíve bought many hundreds of transistors, FETS and capacitors from HK based ebay stores and not a single fake in site.

Iíve had wrong parts suppled, wrong number of parts supplied and wrong batch numbers supplied but no fakes.

This whole fake transistor business is blown completely out of proportion.

By the wayÖ I donít consider an On Semi MPSA 42 for example a fake as long as you know you are getting an On Semi device and not a Motorola!
Thats probably because you dont know how to distinguish or you dont measure to conform that they perform according to spec. The parts do work, thats not the problem.

Perhaps you dont know but ONsemi bought the Motorola semiconductor manufacturing company part of Motorola back in 1999 so you getting the parts exactly from the same factory and made by the same machines and probably the same staff, only the company name has changed.
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Old 9th August 2012, 10:39 AM   #8
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Try Ebay, find Toshiba 2SA1302 for instance. Report back if the amp you soldered them in still functions... I agree that the fear for fake parts is out of proportion but I have experienced fake TDA1541A and fake Wima caps so things are not made up. BTW the fake Wima caps were in a branded preamp.
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Last edited by jean-paul; 9th August 2012 at 10:41 AM.
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Old 9th August 2012, 10:43 AM   #9
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Quote:
Originally Posted by juma View Post
I bought Toshiba 2SK2013/2SJ313 from UT Source, too. And they were not fakes (measured and tested, in compliance with datasheet).
People often declare parts to be fakes based only on visual examination, without proper testing. Many parts have been produced in different housings, depending on year of production and that causes confusion among users who weren't able or willing to execute serious testing or serious research (there are different datasheets for parts produced in different years).
Some attention has to be given to this but on the other side fakers have upped their game and in some cases near impossible to distinguish till youve measure.
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Old 9th August 2012, 10:44 AM   #10
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Quote:
Originally Posted by triplej View Post
Iíve bought many hundreds of transistors, FETS and capacitors from HK based ebay stores and not a single fake in site.

Iíve had wrong parts suppled, wrong number of parts supplied and wrong batch numbers supplied but no fakes.

This whole fake transistor business is blown completely out of proportion.

By the wayÖ I donít consider an On Semi MPSA 42 for example a fake as long as you know you are getting an On Semi device and not a Motorola!
I had parts bought from a authorized EOL distibutor that turned out to be fake, quite to the shock of that distributor. It was hard for them to argue with the company who originally made the part and said there was no record of the batch. THey swore they were original, but my money was returned. Go figure. The fake parts business is in full swing. Don't believe me, go find FQA19n25C. You will find 100's of thousands, none that are original.
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