My Transistors, original or copy?

[LiDer]

Thanks for comments. Cob and Hfe was different from datasheets. Store found items fake and returned the money.

 

[asuslover]

Here some pictures , transistors bought from onsemi.com
4302/4281 could be with different writing.

 

[AndrewT]

the package with the notches between the legs is unknown to me.

Is there a datasheet that confirms this style to be some new form since they took over Fairchild?

 

[anatech]

Hi Andrew,
The notches extend the leakage path, and it is a valid case style. You would tend to see these more on TV parts, but with breakdowns in the 250V + regions, they make sense.

-Chris

 

[googlyone]

I have seen this moulding on ONSEMI parts bought from known good suppliers. I think there may be a bit of catch up on a few ONSEMI datacheets required.

 

[asuslover]

Some other transistors I got from 100% trusted sellers.

 

[anatech]

They are all fine - or the very best fakes I have ever seen!

-Chris

 

[WalterW]

Bought 10 x 2SK170's from seller 'SZ Integrated Circuit' on aliexpress. All fake.
Asked for a full refund. Don't buy there. Picture they advertise with is from a real Toshiba, but they send you fake.
Measured Idss is between 14.0 - 15.5mA. Should be below 12.0mA for BL

 

[stormsonic]

Bought 10 x 2SK170's from seller 'SZ Integrated Circuit' on aliexpress. All fake.
Asked for a full refund. Don't buy there. Picture they advertise with is from a real Toshiba, but they send you fake.
Measured Idss is between 14.0 - 15.5mA. Should be below 12.0mA for BL

2SK170BL :: Other Transistors :: Transistors :: Semiconductors :: Electronic Parts :: Banzai Music GmbH

Why bother with fake Jfets from Aliexpress?

 

[WalterW]

Yeah, you are right. I will stop ordering from Aliexpress

 

[thimios]

2SK170BL :: Other Transistors :: Transistors :: Semiconductors :: Electronic Parts :: Banzai Music GmbH

Why bother with fake Jfets from Aliexpress?

Are you sure that these are original?
0.96 euro?

 

[Trollet]

The one's I bought from Banzai were definitley fake.
Pinch off was way to high and Idss for the SK BL was around 15, SJ74BL had a pinchoff about 1 volt and Idss about 5-6 mA.


They had all other signs of fake as well, the cut on top to the side and to thick body.




/Figge

 

[stormsonic]

Ouch, even they are selling fakes?
I have ordered 2SJ117 from them years ago and they were genuine.

 

[PB2]

2SC2240?

Real or fake, picture of some that I want to buy:

 

[sbrook]

Whatever they are, they look like CRAP! The top of the leads are heavily oxidized and the leads have been subsequently tinned, and very unevenly ... presumably to cover up the oxidation!

Very poorly printed. Find another source!

 

[anatech]

Hi Pete,
That looks to be an original (good). Please let me know where you're going to buy them.

-Chris

 

[PB2]

Hi Pete,
That looks to be an original (good). Please let me know where you're going to buy them.

-Chris

I'll tell you through PM, don't want it to dry up.

 

[PB2]

These arrived today, what's wrong with this picture?

 

[globalplayer]

The aspect ratio?
The exposure time?
I have no idea...

 

[PB2]

Note the leads under the red arrow - they are used pulled parts!