MAT02 transistors on eBay, are they genuine?

Joshua_G · 13th October 2012, 04:03 PM

Does any one know if the MAT02 transistors from the following eBay links are genuine?
IC ADI TO-78(-6) MAT02EH | eBay
1pcs MAT02EH MAT02 Low Noise Matched Dual Monolithic Transistor | eBay
AD MAT02EH CAN-6 CONN HEADER 18POS 0.1 STR 15A | eBay
MAT02FH Manu:AD Encapsulation:CAN-6,Low Noise, Matched Dual Monolithic | eBay
MAT02CH MAT02 -- Matched Dual Monolithic Transistor ( NEW ) | eBay

sawreyrw · 13th October 2012, 04:24 PM

I don't know, but why did you ask? The feedback on the sellers is very favorable.

BrianL · 13th October 2012, 04:24 PM

All the pictures on the pink foam appear to be the same picture, just cropped and zoomed differently -- look at the texture of the foam. If you read this forum you'll find that some folks have managed to do OK buying components on eBay from Chinese vendors, but many have not. You have to answer two questions: a) can you afford to lose your money if it turns out to be a counterfeit and b) once you get it, how do you determine if it's genuine? Given you're likely buying this for its super-good matching, low noise, etc., you want to be sure it's the real thing.

If you decide to proceed, purchase more than needed, cut the can open on one unit and inspect the die under a microscope and see if it's the genuine ADI die. Note that even if it turns out to be the genuine article, it may be that someone is stealing rejects from the factory and selling them.

Joshua_G · 13th October 2012, 04:51 PM

Well, I can afford loosing the money for the few MAT02 I need. However, I can I determine for sure if they are genuine, or if they perform equally to the genuine transistors?

A reliable European source charges about 4 times the charge those Chinese vendors are asking for.

scott wurcer · 13th October 2012, 04:54 PM

Quote:

Originally Posted by BrianL

Note that even if it turns out to be the genuine article, it may be that someone is stealing rejects from the factory and selling them.

That can happen.

Joshua, how many do you need? I can send a few that I know are genuine.

You can save your money for other stuff, send a PM.

Joshua_G · 13th October 2012, 08:27 PM

Quote:

Originally Posted by scott wurcer

That can happen.

Joshua, how many do you need? I can send a few that I know are genuine.

You can save your money for other stuff, send a PM.

Hi Scot,
Thank you very much, you are a real sport.
PM sent.

scott wurcer · 13th October 2012, 10:09 PM

Quote:

Originally Posted by Joshua_G

Hi Scot,
Thank you very much, you are a real sport.
PM sent.

Good thing and warning mine are all laser branded, not to say the others are not genuine.

Joshua_G · 13th October 2012, 10:19 PM

Well, it's difficult for me to believe that some genuine ones will be laser branded and others print branded.

scott wurcer · 14th October 2012, 01:37 PM

Quote:

Originally Posted by Joshua_G

Well, it's difficult for me to believe that some genuine ones will be laser branded and others print branded.

I just noticed that the last seller has the part in a test carrier (not shipped that way) and branded MAT02C a grade that does not exist.

Joshua_G · 14th October 2012, 02:46 PM

Quote:

Originally Posted by scott wurcer

I just noticed that the last seller has the part in a test carrier (not shipped that way) and branded MAT02C a grade that does not exist.

Which is what I suspected...

13th October 2012, 04:03 PM	#1
Joshua_G diyAudio Member Join Date: Nov 2008 Location: Israel	MAT02 transistors on eBay, are they genuine? Does any one know if the MAT02 transistors from the following eBay links are genuine? IC ADI TO-78(-6) MAT02EH \| eBay 1pcs MAT02EH MAT02 Low Noise Matched Dual Monolithic Transistor \| eBay AD MAT02EH CAN-6 CONN HEADER 18POS 0.1 STR 15A \| eBay MAT02FH Manu:AD Encapsulation:CAN-6,Low Noise, Matched Dual Monolithic \| eBay MAT02CH MAT02 -- Matched Dual Monolithic Transistor ( NEW ) \| eBay

13th October 2012, 04:24 PM	#3
BrianL diyAudio Member Join Date: Mar 2002 Location: USA	All the pictures on the pink foam appear to be the same picture, just cropped and zoomed differently -- look at the texture of the foam. If you read this forum you'll find that some folks have managed to do OK buying components on eBay from Chinese vendors, but many have not. You have to answer two questions: a) can you afford to lose your money if it turns out to be a counterfeit and b) once you get it, how do you determine if it's genuine? Given you're likely buying this for its super-good matching, low noise, etc., you want to be sure it's the real thing. If you decide to proceed, purchase more than needed, cut the can open on one unit and inspect the die under a microscope and see if it's the genuine ADI die. Note that even if it turns out to be the genuine article, it may be that someone is stealing rejects from the factory and selling them. __________________ bel

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13th October 2012, 04:24 PM	#2
sawreyrw diyAudio Member Join Date: Apr 2006 Location: Minnesota	I don't know, but why did you ask? The feedback on the sellers is very favorable.

13th October 2012, 04:51 PM	#4
Joshua_G diyAudio Member Join Date: Nov 2008 Location: Israel	Well, I can afford loosing the money for the few MAT02 I need. However, I can I determine for sure if they are genuine, or if they perform equally to the genuine transistors? A reliable European source charges about 4 times the charge those Chinese vendors are asking for.

13th October 2012, 10:19 PM	#8
Joshua_G diyAudio Member Join Date: Nov 2008 Location: Israel	Well, it's difficult for me to believe that some genuine ones will be laser branded and others print branded.