End Of Life for thru hole PNP KSA992 and thru hole P-JFET J175 : October 2025

[Mark Johnson]

I got the notification from DigiKey shown below. Amazingly there are still some KSA992s on the shelf at distributors, and even more amazingly, in the "FB" suffix (Beta = 430-600!) on tape-and-reel . . . . which is better because adjacent parts on the tape probably came from the same wafer and therefore are probably better matched to each other than two randomly chosen parts from a bag of loose TO-92's. Wayne Colburn used these as the PNPs in his BA 2018 linestage; they are sweet sweet parts.

A few of the PJFETs are still on distributor shelves today but in smaller numbers. Be sure to search octopart using the full part number J175-D26Z.

Now is the time to buy. If you can afford to buy 1000 pieces, now is the time to hoard in my opinion. The price for qty=1000 pieces will never be this low, ever again.

(Unless maybe one of the knockoff companies like Central Semiconductor in Hauppauge, New York, or CDIL in New Delhi, decides to make copycats of them).

_

 

[wrenchone]

I have ~500 pieces of KSA992 and about 1500 pieces of leaded J175 - I think I'm set for a while.

 

[FANMUSIC]

KSA992FBTA (hfe 430 -600 ) EOL 10,2025

KSA992F ( hfe 300 -600 ) active !!!!

 

[FANMUSIC]

KSA992FA HFE 300 - 470 also active.

 

[rsavas]

Hi Mark and all,

As of today, this is what onsemi shows for ksa992 availability, they're thinning the herd so to speak. Basically like fjv992, it's not offered in grades. but the processes are so good these days, I think device to device, lot to lot variation are so tight. I did stock up on ksa992FB on tape however.
FJV992FMTF also show active production
Cheers

 

[chermann]

Hi

can somebody explain the advantage of J175 vs. J176.
J175 is tested and its start to open at -1,8V and you get somtimes more then 12mA, transc. is about 5,7
J176 is opn at -0,28V adn you get 7mA, transc. is 6,5

J75 as CCS like the J113?

kr
chris

 

[Mark Johnson]

can somebody explain the advantage of J175 vs. J176

Maybe you will enjoy reading @woofertester 's discussion of his preference, J175 versus J176, it's in post # 529 of (this Forum thread)
.

 

[wrenchone]

I just nailed down another 500 pieces of KSA992 - maybe I should do the same for its complement.

 

[wrenchone]

I just nailed down 500 pieces of KSA1845 with Mouser.

 

[HighTec]

A bit off-topic. Bast..dz are killing all good audio through hole parts.

KSA1015YTA is scheduled for obsolescence and will be discontinued by the manufacturer. Complementary KSC1815YTA still available.


https://www.mouser.com/PCN/onsemi_Generic_PD26576XG.pdf

 

[wrenchone]

The 500 pieces of KSA992 are winging their way slowly and indirectly to me via Montana Fedex says I may get them tomorrow.

 

[Mark Tillotson]

Its only the FB grade that are going. The F grade is still around (unbinned basically). Has anyone found if there is a SMT package for these dies?

[ Ah, I see the FJV992 - which is mentioned above ].

 

[wrenchone]

And its complement, the FJV1845.

 

[rsavas]

To note, Toshiba has many nice smt parts still in production, some dating back from first intro in the 80's.
Searching is a bit of a problem when Mouser uses different package names or no names at all for the same and similar devices, SC-59, TO-236mod, smini all similar to SOT-23
2sa1163/2sc2712 are similar to FJV992/1845
https://www.mouser.ca/c/semiconduct...sistors-bjt/?m=Toshiba&mounting style=SMD/SMT

 

[wrenchone]

I'm sitting here looking at the 500 pieces of KSC1845 I just received from Mouser....