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Are these 2SC3556 transistors fake??
Are these 2SC3556 transistors fake??
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Old 30th July 2012, 08:29 PM   #1
diy didi is offline diy didi  South Africa
diyAudio Member
Join Date: Sep 2009
Location: Pretoria
Default Are these 2SC3556 transistors fake??

Could someone please verify if these are indeed fake, or useless.
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Old 30th July 2012, 08:36 PM   #2
Tekko is offline Tekko
Join Date: Jan 2005
Put them in a test jig and see if they meet spec. If they fail at a fraction of their spec, their fake.
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Old 30th July 2012, 09:29 PM   #3
Ian Finch is online now Ian Finch  Australia
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Join Date: Apr 2010
Location: Coffs Harbour
Unless Sanken have changed their package specification from MT100, you have what looks like an old TOP3 package on the lower 2 examples (yes, TOP3, not TO3P) The word fake hardly applies - perhaps "feeble attempt at a fake" would be apt.

Just as much a worry, the laser mark panel on the MT100 style examples is something I've not seen on Sanken parts yet either. Consequently, they may all be suspect in some respect.

Despite the constant warnings here about Ebay fakes, people obviously think that their chances of buying genuine and NOS parts at firesale prices are still very good. Well, how are the chances now?

It all comes down to testing, though. Without objective proof, as Tekko posted, it is just conjecture.
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