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4hv.org :: Forums :: General Science and Electronics
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is there any chance of these being fakes?

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Thomas W
Fri Mar 23 2012, 07:50PM Print
Thomas W Registered Member #3324 Joined: Sun Oct 17 2010, 06:57PM
Location:
Posts: 1276
im thinking of buying this, how likely are they to be fakes?
Link2

also, are there any general ways to aviod fake parts?

thanks,
Tom Williamson
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Sulaiman
Fri Mar 23 2012, 07:52PM
Sulaiman Registered Member #162 Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
with 11620 transactions and 99.7% positive feedback it should be ok.
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IamSmooth
Fri Mar 23 2012, 09:37PM
IamSmooth Registered Member #190 Joined: Fri Feb 17 2006, 12:00AM
Location:
Posts: 1567
I've bought many semiconductors and other parts from supplies like these. The parts are good, the shipping is usually fast and the price is cheaper than you will find at Digikey or Mouser.
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Thomas W
Fri Mar 23 2012, 09:44PM
Thomas W Registered Member #3324 Joined: Sun Oct 17 2010, 06:57PM
Location:
Posts: 1276
ah ok, thanks
ever since i read a thread on fake IGBTs from china ive been kinda sacred of buying componenets from anywhere like china or thiland ect XD
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Patrick
Sat Mar 24 2012, 02:00AM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
if your getting them suspiciously cheaper, and or look modified (like the mold rounds are missing) then youll want to excercise caution, once you find a good known seller, save that person as a supplier for later. The problem is many butchers charge the right amount and pocket the difference.
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Thomas W
Sat Mar 24 2012, 09:40AM
Thomas W Registered Member #3324 Joined: Sun Oct 17 2010, 06:57PM
Location:
Posts: 1276
how do you mean, the mold rounds?
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Patrick
Sat Mar 24 2012, 05:52PM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Tom Williamson wrote ...

how do you mean, the mold rounds?
there are often 2mm or smaller round flats with a mirror like finish, when cowards grind the original part down, those go missing.
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Thomas W
Sat Mar 24 2012, 06:00PM
Thomas W Registered Member #3324 Joined: Sun Oct 17 2010, 06:57PM
Location:
Posts: 1276
so they basickly buy cheap TO-247 packages and grind off their name then re-etch it?
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Patrick
Sat Mar 24 2012, 06:10PM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Tom Williamson wrote ...

so they basickly buy cheap TO-247 packages and grind off their name then re-etch it?
yep, they even do this:


1327390644 2431 FT1630 Untitled123


didnt we have a previous thread that went over much of this?
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Marko
Sat Mar 24 2012, 06:34PM
Marko Registered Member #89 Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
Hi Tom,

Well, the package in the picture looks legitimate. If you receive parts that look exactly the same I wouldn't worry!
I can imagine the part number being printed in a flat groove on the package makes counterfeiting quite a bit harder.

I myself am currently far more frustrated by lack of availability of good igbt's. Seems like all major resellers can hardly be bothered shipping to Croatia anymore due to ever more bizarre habits of Croatian customs. (Digikey now charges $120 shipping even if I buy just one igbt).


So, I'd be very glad to know if any of you has had experience with this following seller?

Link2

Their prices seem similar to arrow electronics, though this by no means guarantees they aren't fakes!

Cheers,

Marko








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