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The Motorola 2N5566 orignal or fake !?
The Motorola 2N5566 orignal or fake !?
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Old 4th January 2017, 11:17 AM   #1
chientechnical is offline chientechnical  Viet Nam
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Join Date: May 2016
Location: 122050, Hanoi
Question The Motorola 2N5566 orignal or fake !?

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,
Attached Images
File Type: jpg DSC_0013.jpg (433.7 KB, 266 views)
File Type: jpg DSC_0014.jpg (442.4 KB, 261 views)

Last edited by jazbo8; 5th January 2017 at 02:28 PM. Reason: Image size
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Old 5th January 2017, 05:59 AM   #2
davidsrsb is offline davidsrsb  Malaysia
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Join Date: Dec 2005
Location: Kuala Lumpur
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...jfet5564_6.pdf
If somebody has gone to the bother of matching two jfets and packaging them, it isn't a fake
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Old 5th January 2017, 02:05 PM   #3
chientechnical is offline chientechnical  Viet Nam
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Join Date: May 2016
Location: 122050, Hanoi
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

Last edited by jazbo8; 5th January 2017 at 02:30 PM. Reason: Image size
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Old 5th January 2017, 05:22 PM   #4
chientechnical is offline chientechnical  Viet Nam
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Join Date: May 2016
Location: 122050, Hanoi
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.
Attached Images
File Type: jpg DSC_0055.jpg (639.3 KB, 198 views)
File Type: jpg DSC_0056.jpg (526.6 KB, 183 views)

Last edited by chientechnical; 5th January 2017 at 05:31 PM.
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Old 5th January 2017, 07:15 PM   #5
chientechnical is offline chientechnical  Viet Nam
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Join Date: May 2016
Location: 122050, Hanoi
I update the schematic used for test before as attacked below.
Room temperature: 20oC
Attached Images
File Type: png sketch-1483643232919.png (180.3 KB, 188 views)

Last edited by chientechnical; 5th January 2017 at 07:21 PM.
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Old 6th January 2017, 04:37 PM   #6
davidsrsb is offline davidsrsb  Malaysia
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Replace your 1.5V battery with a 9V
Remove the potentiometer and connect drain to 9V, gate to 0V
Measure the voltage between source and 0V

Expect less than 3V
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Old 16th October 2018, 11:36 AM   #7
pras1170 is offline pras1170  China
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Join Date: Sep 2018
Location: china shenzhen
Quote:
Originally Posted by chientechnical View Post
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
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Old 22nd October 2018, 08:02 AM   #8
Mooly is offline Mooly  United Kingdom
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The Motorola 2N5566 orignal or fake !?


Sales related posts have been removed. Please read the rules for information on vendors and selling.
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Old 22nd October 2018, 08:27 AM   #9
pras1170 is offline pras1170  China
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Join Date: Sep 2018
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Quote:
Originally Posted by Mooly View Post


Sales related posts have been removed. Please read the rules for information on vendors and selling.
I have not sold goods here.
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Old 22nd October 2018, 08:35 AM   #10
Mooly is offline Mooly  United Kingdom
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The Motorola 2N5566 orignal or fake !?


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.
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