How to tell fake from real transistor

ifrythings · 16th October 2006, 09:08 PM

I got a fair amount of 2SA1302 and 2SC3182 transistor that all say Toshiba on them but some look different then other's and some have off centered holes in the black area on the back of the device.

How can I tell which ones are fake and which ones are real. I would like to keep the devices in working condition if posible and just root out the bad ones.

Any ways to tell or test would be highly appreciated.

Thanks

Dave

Netlist · 16th October 2006, 09:12 PM

Did you look here ?

/Hugo

Netlist · 13th December 2006, 08:46 PM

Would a list with production dates of transistors exist?
That would make it easier to eliminate fakes.
I’m asking because I found a supplier selling e.g. a 2SB600 RoHs compliant.
2SB600 used to be made by Nec but is AFAIK discontinued.
The nice thing is: Said supplier has plenty of –most likely discontinued- RoHs compliant devices.

/Hugo

16th October 2006, 09:08 PM	#1
ifrythings diyAudio Member Join Date: Oct 2005	How to tell fake from real transistor I got a fair amount of 2SA1302 and 2SC3182 transistor that all say Toshiba on them but some look different then other's and some have off centered holes in the black area on the back of the device. How can I tell which ones are fake and which ones are real. I would like to keep the devices in working condition if posible and just root out the bad ones. Any ways to tell or test would be highly appreciated. Thanks Dave

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16th October 2006, 09:12 PM	#2
Netlist diyAudio Moderator Join Date: Jan 2003	Did you look here ? /Hugo

13th December 2006, 08:46 PM	#3
Netlist diyAudio Moderator Join Date: Jan 2003	Would a list with production dates of transistors exist? That would make it easier to eliminate fakes. I’m asking because I found a supplier selling e.g. a 2SB600 RoHs compliant. 2SB600 used to be made by Nec but is AFAIK discontinued. The nice thing is: Said supplier has plenty of –most likely discontinued- RoHs compliant devices. /Hugo

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