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Old 23rd November 2012, 04:48 AM   #1
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Default sjep120r100 faking from China

Today I've got these power jfet from som eone in China and they told me it surely brand new !
Look at this picture You will find many different, then I test them it was UJT !!!
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Old 23rd November 2012, 06:09 AM   #2
The Dastardly Dad of Three
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owww!!! so sorry to hear that mate & thanks for the warning!
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Old 23rd November 2012, 08:11 PM   #3
dsdjoy is offline dsdjoy  Germany
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Hello anadigit,

from the foto they look like genuine.
Are you sure they are fake ?
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Old 23rd November 2012, 10:16 PM   #4
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Originally Posted by dsdjoy View Post
Hello anadigit,

from the foto they look like genuine.
Are you sure they are fake ?
Yes, it's look like new but not genue.
I've ordered from Tranton company whom advertise in Alibaba.
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Old 24th November 2012, 02:07 PM   #5
nr12 is offline nr12  Germany
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Here's a picture of one ordered at Farnell
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Old 24th November 2012, 04:18 PM   #6
alex mm is offline alex mm  Europe
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....... same source
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Old 24th November 2012, 04:24 PM   #7
qusp is offline qusp  Australia
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yep, the model lettering is clearly quite different on the fakes

I wouldnt trust anything ordered at alibaba for high end electronics, not a chance

Last edited by qusp; 24th November 2012 at 04:27 PM.
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Old 24th November 2012, 04:51 PM   #8
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Didnt take long, did it.
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Old 27th November 2012, 07:01 PM   #9
Tea-Bag is offline Tea-Bag  United States
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dont go by just the lettering differences. The original R100's and some R100As used the more 'white' letter printing. They also used a more 'shiny' legs and drain substrate backing.

That being said, I've had a couple of parts searchers seek these out lately. They are saying any offer right now are from seedy sources and likely fake. So really buyer beware.
The IC district of China can unfortuntely produce whatever you want for a part in printing in a couple of days notice.

R100's of any sort will have a much lower VgS test then any IRF240.
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Old 27th November 2012, 09:03 PM   #10
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Quote:
Originally Posted by ANADIGIT View Post
Today I've got these power jfet from som eone in China and they told me it surely brand new !
Look at this picture You will find many different, then I test them it was UJT !!!
Does UJT mean Uni Junction Transistor?
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