Any genuine source to get any of these or replacements in the same package type?
2sa1266
2sa733
2sa1015
2sa1023
2sc945
2sc3198
2sc1015
2sc1027
2sa1266
2sa733
2sa1015
2sa1023
2sc945
2sc3198
2sc1015
2sc1027
2SA1015 --> KSA1015 (also, KSA1815)
2SA1023 --> try KSA992 perhaps?
2SC945 / 2SA733 --> KSC945 should be fine but KSA733 appears to be no great shakes; you can also use KSC1845 and KSA992 though the former appears to be hard to get right now despite still being marked as active.
2SC3198 --> try digging up some KTC3198 perhaps? There's a complementary KTA1266 as well.
2SC1015 appears to be an RF power transistor?
2SC1027 - again, you may have better luck digging up a KTC1027. 120 V / 800 mA TO-92L drivers aren't exactly growing on trees, and honestly I would investigate the feasibility of using something similar in TO-126 instead. These TO-92L drivers have always been a weak spot, their thermals just aren't very good.
2SA1023 --> try KSA992 perhaps?
2SC945 / 2SA733 --> KSC945 should be fine but KSA733 appears to be no great shakes; you can also use KSC1845 and KSA992 though the former appears to be hard to get right now despite still being marked as active.
2SC3198 --> try digging up some KTC3198 perhaps? There's a complementary KTA1266 as well.
2SC1015 appears to be an RF power transistor?
2SC1027 - again, you may have better luck digging up a KTC1027. 120 V / 800 mA TO-92L drivers aren't exactly growing on trees, and honestly I would investigate the feasibility of using something similar in TO-126 instead. These TO-92L drivers have always been a weak spot, their thermals just aren't very good.
Instead of 945, use 2SD882...it works in mosquito racquets.
1015 and 1815 are a complimentary pair, pretty common in TVs.
Genuine? No idea, but functional ones were 2 Rupees here, 3 cents of US currency.
1015 and 1815 are a complimentary pair, pretty common in TVs.
Genuine? No idea, but functional ones were 2 Rupees here, 3 cents of US currency.
There really isn’t anything special or compelling about the C945/A733. Sort of the Jap-pin out equivalent of the 2N3904/6. When they finally go away just use the C1845/A992 for *everything*.
The tall TO-92s were a rather unique beast, I’m glad I did my lifetime buys a few years back. Because now they are gone. In a lot of apps you can just stick in TO-126’s, but those are now on the chopping block - buy them now because they won’t be around long. I use the tall TO-92’s to replace regular TO 92’s that I deem to be running too hot to be reliable. They also find their way into my own designs when they are more suitable than anything else.
As far as whether common TO-92s are genuine - it seems they DO have fakes out there. Even for three cent transistors. I would never have believed it until I was burned by a fake MPSA06 which turned out to be PNP. All the ones marked that way were. They weren’t *bad* transistors (hFE was about 400, and breakdown voltage around 90) but won’t work where an NPN is called for.
The tall TO-92s were a rather unique beast, I’m glad I did my lifetime buys a few years back. Because now they are gone. In a lot of apps you can just stick in TO-126’s, but those are now on the chopping block - buy them now because they won’t be around long. I use the tall TO-92’s to replace regular TO 92’s that I deem to be running too hot to be reliable. They also find their way into my own designs when they are more suitable than anything else.
As far as whether common TO-92s are genuine - it seems they DO have fakes out there. Even for three cent transistors. I would never have believed it until I was burned by a fake MPSA06 which turned out to be PNP. All the ones marked that way were. They weren’t *bad* transistors (hFE was about 400, and breakdown voltage around 90) but won’t work where an NPN is called for.
The TO-92 clairvoyant NOT
Many of your statements are false
Sure many parts are obsolete but that does not mean that they all are or that you can predict what and when they will be next. You do not control the economics. Just recently I saw onsemi updating old Fairchild to-92 data sheets. Why would they be doing that if they were on the chopping block?
I use ksa1013 and ksc2383 in new designs, no problem at all
Many of your statements are false
Sure many parts are obsolete but that does not mean that they all are or that you can predict what and when they will be next. You do not control the economics. Just recently I saw onsemi updating old Fairchild to-92 data sheets. Why would they be doing that if they were on the chopping block?
I use ksa1013 and ksc2383 in new designs, no problem at all
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You don’t have to be clairvoyant - just observe over time and draw your own conclusions. Page after page of “obsolete non-stock” or MOQ from Rochester of types that were available just a few short years ago. Just a smattering of types left. Ya’ll are going to be squealing like pigs caught under a fence when the KSC3503/A1381 go EOL. Tick-tock, tick-tock, tick-to k.