V-FET / SIT data sheets

[Soundhappy]

True. Is there any information available on the "ranking codes" for the 2SJ28/2SK82?
The parts I tested have labels "JD-33" (2SJ28) and "JE-33" (2SK82).

It's the same ranking code priciple for all Sony Vfets look at post # 33
Your 2SJ/2SK are rank code 33

 

[rottalpha]

and more

 

[joshvi]

Today I cut opened some V fets. 2sk60,2sk82,2sk70,2sk76 and 2sk180

Tokin 2sk 180 die size is 13mmx13mm. Very Big one.

2sk60 is the smallest one . Only 2.5mmx2.5mm. grade /batch P56

Yamaha 2sk76 3mmx3mm

NEC 2sk70 4mmx4mm used thick bonding wire compared to others

Sony 2sk82 two 4mmx4mm die connected parallel. grade JE33

I thought 2sk82 is a double die version of 2sk60. but 2sk82 have two bigger sized die.

 

[gary s]

Hell, that is a few dollars worth down the drain - thanks for the info though.

 

[joshvi]

All except 2sk180 are dead ones. Removed from Sony, Sansui and Yamaha amplifiers.

 

[joshvi]

Compare

 

[joshvi]

2sk60

 

[joshvi]

2sk82

 

[joshvi]

2sk70

 

[joshvi]

2sk76

 

[joshvi]

Big one 2sk180

 

[WalterW]

Joshvi, can you post sharper bigger pictures of the 2SK60 and 2SK82?

 

[joshvi]

Sure, give me little more time

 

[mgb1965]

Very interesting insight, joshvi!

Is this the tool you used?

 

[mgb1965]

Does anyone known the die size of the 2SK182 and THF-51 items?

Just curious.

 

[joshvi]

2sk82 die is covered with silicon. Removed silicon from 2sk60

 

[mbrennwa]

I was referred to this thread when I asked about the 2SK79, but I could not find anything about this part here (am I blind?). Anyway, here's a datasheet I found on the Amplimos website (with wrong/useless pin labels), my own (correct) pin label and my curve tracer data.

 

[petoluk]

I was referred to this thread when I asked about the 2SK79, but I could not find anything about this part here (am I blind?).

The very first post? The PDF contains J18, K60, K63 & K79. ;-)

 

[mbrennwa]

Hmm, yes... the search function did not find it though. Also, the 2SK79 datasheet attached to the first post contains the same pinout error as the one on the Amplimos website (they specify BJT pins, which are useless for a JFET/VFET).

 

[petoluk]

Hehe, I never noticed that! :-D Thanks for providing the correct pinout! But just for the heck of it, I'll check what the Japanese FET Data Books have got to say on this matter (when I get home next week). Cheers!