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2SA1215 2SC2921, identify genuine and fake
2SA1215 2SC2921, identify genuine and fake
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Old 31st January 2013, 08:37 AM   #1
Sunmansli is offline Sunmansli  China
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Default 2SA1215 2SC2921, identify genuine and fake

Q: How to identify genuine and fake?
A: Currently 2SA1215/2SC2921, fake (Chinese copy) transistor from the appearance has been very difficult to distinguish. but there are three ways to try, this is just my personal experience, does not mean all:
1, Weight: genuine 2SA1215 or 2SC2921 the weight is approx 18.4 g (see SanKen datasheet, I have verified 20 PCS, is 18.4 ~ 18.5 g), but Chinese copy is 15.5 g.
2, Dissect: genuine is two layers of metal heat sink, but Chinese copy is one. see the following pictures.
3, Test: genuine 100% ~ 120% load output is good, fake 60% load output is broken.

Q: Sanken has been discontinued 2SA1215 and 2SC2921?
A: Some friends say Sanken has been discontinued 2SA1215 and 2SC2921, about the information I asked Sanken agents, until today(31st-January-2013) has not been discontinued 2SA1215 and 2SC2921, about these you can contact SanKen or arents, or visit SanKen website.

Q: Why the transistor surface dust?
A: This is the anti-static powder, rather than dust.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.

My genuine SanKen transistors:
Click the image to open in full size.

Last edited by Sunmansli; 31st January 2013 at 08:52 AM.
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Old 31st January 2013, 04:07 PM   #2
HighTec is offline HighTec  Croatia
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Greetings Sunmansli (Electronics Salon).
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Old 22nd July 2016, 10:39 PM   #3
afshindiy is offline afshindiy  Iran
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thanks for your information .

afshin
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Old 22nd July 2016, 10:45 PM   #4
nigelwright7557 is offline nigelwright7557  United Kingdom
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Always buy from reputable dealers.
Its a false economy buying off ebay or from China.

I always buy from RS Components or Farnell Components.
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Old 23rd July 2016, 12:52 AM   #5
restorer-john is offline restorer-john  Australia
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The transistors are still available (3 years later) in vast quantities (1000+) in Japan, genuine, and in at least 2 different grades (/Y/G).

Buy from reputable suppliers and you'll have no problems.
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Old 4th February 2018, 01:11 AM   #6
kokoriantz is offline kokoriantz  Lebanon
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On Aliexpress ,fake and original but factory rejects bear the mention " Is_customized_yes" .The Chinese are honest among themselves.
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Old 4th February 2018, 11:05 AM   #7
Ian Finch is offline Ian Finch  Australia
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Quote:
Originally Posted by theenggprojects View Post
.... I have written this article and I have tried my best to give all related details....Thanks.
You have omitted the most important detail about these premium and unique Sanken audio transistors. They are LAPT type and quite different in their chip construction (there are multiple discrete transistors on the chip) to other audio transistor types like ring emitter, perforated emitter and even the honest copies by reputable manufacturers like ISC. They perform much better and really sound better than just about anything else.

I think we would agree that no fake is acceptable but when you mention that copies of transistors are OK, I think it is an empty statement if you refer to anything other than standard industrial types. High quality, premium audio parts are unmistakably better performing and well worth the higher price that a manufacturer like Sanken asks.
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Old 4th February 2018, 03:00 PM   #8
hahfran is offline hahfran  Germany
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It needs not be fake made in China. It can also be offspec devices. Reliable makers of hifi amps do not order for ex 2SAxxxx but they order a specification. Their specification and the semiconductor manufacturer has to meet that if not it is more or less scrap and is sold for almost nothing to particular wholesale dealer in HongKong etc who just sell these as originals
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Old 4th February 2018, 04:22 PM   #9
thimios is offline thimios  Greece
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Quote:
Originally Posted by hahfran View Post
It needs not be fake made in China. It can also be offspec devices. Reliable makers of hifi amps do not order for ex 2SAxxxx but they order a specification. Their specification and the semiconductor manufacturer has to meet that if not it is more or less scrap and is sold for almost nothing to particular wholesale dealer in HongKong etc who just sell these as originals
Fake 2CA/2SC aren't out of spec original units,they are absolutely different things.
Cheap toys.
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Old 15th May 2018, 03:43 PM   #10
sharkey22 is offline sharkey22  United Kingdom
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Exactly thimios. I have twice ordered what appear to be genuine Sanken 2sa1295/2sc3264 from AliExpress. Sellers picture is almost certainly of genuine Sanken but what they send is FAKE. Sanken 2sa1295/2sc3264 are becoming hard to find and are never cheap to buy since they are high power high quality obselete parts. Good luck if you need to make up matched parallel banks of NPN & PNP. Fortunately I opened a dispute on both occasions and was awarded full refund without returning the fake parts.

Last edited by sharkey22; 15th May 2018 at 03:45 PM. Reason: more information.
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