FS: TOS 2SK2013/2SJ313

[A Jedi]

PM sent

 

[bergy]

I now have some matched quad (K2013/J313-2 each) for sales. Devices are matched for Vgs at 40mA. Due to scarcity. please PM me to check availability.
Thanks
Prakit

got mine thanks!

 

[bOTL]

Prakit
I am interested in 5 pairs or 3 quads if you have stock what would is the price.
PM sent

 

[Algar_emi]

Hi. i would take a matched quad. Thanks
sB

 

[Algar_emi]

Hi. I would like a matched quad. Thanks
sB

 

[audiodany]

Hi, I would like four matched pair. Can you tell me if possible and which kind of payement you prefere
Many thx

 

[prakit]

Please see your PM.

 

[gary s]

I have sent a PM re any left, thanks.

 

[jotom750]

Hi. I know that your devices are genuine and can be used for confirmation. I have some already that I'm unsure of, before I buy some more is it possible for you to post close up high resolution both side pictures of your devices?
Many thanks in advance.

 

[prakit]

Hi. I know that your devices are genuine and can be used for confirmation. I have some already that I'm unsure of, before I buy some more is it possible for you to post close up high resolution both side pictures of your devices?
Many thanks in advance.

Here you go.
I would do some measurements as well. Easiest one is their Vgs. It is distinctly in the range of (2V, 2.3V) at Id~50mA for the genuine items. Most fake ones are in 4V range. Measuring its transconductance should be useful too.

 

[jotom750]

Thanks. I will find mine and compare them with yours. I will let you know!
Kind Regards.

 

[jotom750]

Here are some pictures.

 

[jotom750]

Hi Prakit. Though I think mine are real I would like to buy some so that I can get better matches. Please send me a PM and I will confirm details. Thank you.

 

[JeffYoung]

Mine have a bit more of an overlap between the two sections of the Toshiba 'T'. But I don't know if that's relevant or not.

 

[JeffYoung]

Hmmm... note that the top of the '1' is also a bit different on mine and Prakit's than yours. Again, I haven't a clue if this is relevant or not. Manufacturers certainly changed lines from time to time which resulted in different text shapes, etc.

Have you measured yours? On some fake LU1014s I had plotting just 4 or 5 points was clear that they're weren't "right".

 

[gary s]

I can confirm what prakit says when measuring them. The genuine ones I have, measure between 2.29 to 2.48Vgs for the J313 and 2.41 to 2.45Vgs for the K2013 at 100mA. Fake ones will measure over 4Vgs which is similar to the IRF types. The true Toshiba's have a lower Vgs than other brands of Mosfets.

 

[jotom750]

Thanks to all. I will buy some just in case and I will measure mine at the weekend.

 

[gary s]

Look forward to your test results. I use the NP test method with a regulated 15VDC supply through a 120 ohm 5W resistor to give 100mA. I time for 1 minute and record the Vgs for each. I also clamp the device to a heatsink to make connecting the leads with test clips a lot easier.

 

[jotom750]

Thanks Gary for your input. I'll post the results here when done.

 

[jotom750]

Hi All,
After measuring a couple of each of my devices, I get typical figures.
For the K2013 of approx 2.25Vgs at 100mA.
For the J313 of approx 2.19Vgs at 100mA.
So I am assuming that these are genuine (hopefully).
Thanks to all.