The Motorola 2N5566 orignal or fake !?

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Hello everyone,

I purchased Motorola 2N5566 on ebay, from a Seller in the US country.
This is link: 2N5566 CAN-6 Matched N-Channel JFET BY MOTOROLA

Very many people in the community at my country said "this item is fake". They just look to images, without measurements. They're very sure this item is fake.
I have attached the image below too.

I received this item and I have 30 days left for refund to seller.
I can make an new order and send some sample to you. I need help for measurement this item.

US member is quickly because seller living at US too.
Please send to me an messenger or email to chien.technical@gmail.com - if you free-time or can help me.
Thank and regards,
 

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This one usually has gold coloured leads, so suspicious.
It's easy to test, connect the drains to 9V, gate to 0V and a voltmeter between source and ground.
The two Vp values should be very close and between 0.5V and 3V
See datasheet http://ezphysics.nchu.edu.tw/prophys/ael/File/Datasheet/jfet5564_6.pdf
If somebody has gone to the bother of matching two jfets and packaging them, it isn't a fake
 
Thank Davidsrsb,

Now, I don't have the necessary instruments to measure electricity. I will try to measure them in the upcoming.

I'm tried physical check between 2N5566 (doubt fake)
with 2N4392 (orignal genuine).

Top view: inside and outside are same color between 2N5566 and 2N4392.
sketch-1483623053446.jpg
Bottom view, from left to right: 2N5566, BCY59ix, 2N4392: BCY59ix is different color; 2N5566 & 2N4392 same color.
sketch-1483623638829.jpg

Front label: (2N4392 is different logo; 2N5566 & BCY59ix is same logo).
sketch-1483623856301.jpg
 
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I'm tried an small setup as attacked below.

Volt supply when un-connect to board = 1.544V (small pin)
Vds = 1.469V
Rs = 10.1 ohm
VR to control Vgs = 50K ohm


Case 1: (left side of jfet)
Vgs = -117mV (minimum VR can control)
Volt drop on Rs = 108mV (0.108V)
=> Id = 0.108/10.1 x 1000 = 10.69mA

Case 2: (left side of jfet)
Vgs = 100mV.
Volt drop on Rs = 117mV
=> Id = 0.117/10.1 x 1000 = 11.58mA

Case 3: (lest side of jfet)
Vgs = 300mV
Volt drop on Rs = 128mV
=> Id = 0.128/10.1 x 1000 = 12.67mA.

Case 4: (righr side of jfet)
Vgs = 300mV
Volt drop on Rs = 127mV
=> Id = 0.127/10.1 = 12.57mA

Case 5: Right side of Jfet.
Vgs = 0.92V (maximum VR can control)
Volt drop on Rs = 0.617V
=> Id = 0.617/10.1 x 1000 = 61mA

So, them are orignal or fake !?
I'm only Application Engineer on Medical. My electric is not good.
Thank much for any reply.
 

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Hello everyone,

I purchased Motorola 2N5566 on ebay, from a Seller in the US country.
This is link: 2N5566 CAN-6 Matched N-Channel JFET BY MOTOROLA

Very many people in the community at my country said "this item is fake". They just look to images, without measurements. They're very sure this item is fake.
I have attached the image below too.

I received this item and I have 30 days left for refund to seller.
I can make an new order and send some sample to you. I need help for measurement this item.

US member is quickly because seller living at US too.
Please send to me an messenger or email to chien.technical@gmail.com - if you free-time or can help me.
Thank and regards,

Your picture is fake
Refurbished, not authentic
 
Administrator
Joined 2007
Paid Member
:cop:

You are posting large quantities of pictures of parts together with store numbers and 'free shipping' into old threads. You also posted an email address in this thread for anyone interested in those parts to contact you.

THIS IS NOT ALLOWED in the regular forums.

There are at least two other very recent threads where you have done this. Again, those images of parts for sale have been deleted.
 
:cop:

You are posting large quantities of pictures of parts together with store numbers and 'free shipping' into old threads. You also posted an email address in this thread for anyone interested in those parts to contact you.

THIS IS NOT ALLOWED in the regular forums.

There are at least two other very recent threads where you have done this. Again, those images of parts for sale have been deleted.

Ok, I know I made a mistake. These words cannot appear in the original picture
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.