### Counterfeit transistors

Some fake Toshiba Transistor 2S5200/A1943
 

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Dunno if this is the right forum/thread to ask you guys about possible faking the TI TPA3118. I'd assume, they might blacktop/sanddown TPA3130 to sell TPA3118.

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#1 Genuine, like those i have directly from TI
#2 possible Fake, Pin1 indicator not made by the mold but marked Lot#4AAD6TT(G4)
#3 possible Fake, Same Lot# as #2 but with molded Pin1 indicator
#4 possible Fake, Same Lot# as #2
#5 possible Fake, Same Lot# as #2 but bigger Pin1 indicator
#6 possible Fake, Different TI logo pattern than the others, smudges on font
#7 possible Fake, different distance of Pin1 indicator compared to #1 and #3

What do you guys think?
 

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#6 might be correct logo, but well cleaned chip ????? No mistake in G4 either, not in G or in horizontal allignement G4, but size of print not directly visable in comparison. The funny chip with laser marked dot had larger print than genuine.

#3 might be original laserprint that was used to make the series of "laser dot" and "bad alligned G4" series
 
#6 is very sharp/thin, t in logo is also visibly separate line in gmarsh chip I used as comparison, so cleaning maybe I thought. The entire print on #6 is a little more center chip or lower than expected on tpa3118, that is also true for most Sanwu sold by Sanwu board chips.
 
....Please take a look at the pics I've attached.
According to Rod Elliot's pages...these are counterfeit due to MEXICO at the bottom row...and not MEX...on 2nd row.
Also...date code not in correct place.

However...these were obtained from a 3rd party some 14/15 years ago as samples from ON-Semi, and I believe this info. to be reliable.
I've chatted with ON-Semi...and provided the picture below.
They suggest that printing standards/protocols may have changed over the years...and not to rely on the internet info.

They most certainly PASS the acetone test....but I haven't been able to test them conclusively yet.

Any thoughts out there please?
 

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