Anyway to buy discontinued Motorola power transistors?

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Nikolai Petrenko

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Joined 2016
#1
Hi all!
I want to buy some MJ3281A and MJ1302A, but they have been discontinued for long time ago. I like them because of their linearity and NPN-PNP matching. You may advice me to choose plastic version like MJL3281A or NJW3281G, but I like TO-3 case very much because of vague reason.
You may think that I am a crazy guy 😀
Can anyone let me know where to buy MJ3281A/1302A pairs? Of course not counterfeit parts 😀
Thanks!
 
#2
Onsemi are the offshoot from Motorola.
They would produce the original transistors using the original "process" until they thought they had developed a better/cheaper way to do it.

I would expect that when ONsemi uses the same model code it is made the same way.

There are professionals from these (and other) companies posting here. I'm sure they will have more accurate information.
 
#4
AndrewT said:
Onsemi are the offshoot from Motorola.
They would produce the original transistors using the original "process" until they thought they had developed a better/cheaper way to do it.

I would expect that when ONsemi uses the same model code it is made the same way.

There are professionals from these (and other) companies posting here. I'm sure they will have more accurate information.
Click to expand...

But ON seem be has never been produced MJ3281A/1302A! Cause they are very very rare.
 
#6
Motorola may have discontinued them before ONsemi came into being.
The original 3281/1302 were To3 devices and were used very rarely. One instance I am aware of was a HiFi magazine ClassA design where the devices were marked with a unique code. No one could copy the design because you could only get the (then unknown) devices through the magazine shop.
The To3 were not popular because hardly anyone wanted to use the little known 3281/1302 and special coding did not alert the buyers to the new product.
I wonder who invented these faster output devices? Sanken, or Motorola, or some other?
 
#7
AndrewT said:
Motorola may have discontinued them before ONsemi came into being.
The original 3281/1302 were To3 devices and were used very rarely. One instance I am aware of was a HiFi magazine ClassA design where the devices were marked with a unique code. No one could copy the design because you could only get the (then unknown) devices through the magazine shop.
The To3 were not popular because hardly anyone wanted to use the little known 3281/1302 and special coding did not alert the buyers to the new product.
I wonder who invented these faster output devices? Sanken, or Motorola, or some other?
Click to expand...
I think MJ3281A were TO-3 version of Toshiba 2SC3281, but Motorola used others method to manufactured them.
Some guys on ebay sell those transistors, but look at the pictures, I can sure that those are counterfeit, because the "M" letter in the circle are wrong, The "J" too.
 
#9
Motorola's 1302/3281 TO3 devices aren't particularly suited for audio use compared to Toshiba's parts with the same numbers.

The continuation of the Motorola TO3 parts are MJ21195 and MJ21196. Likewise, these are definitely not as good as Toshiba's audio devices, but the only option today if you want TO3.

All discontinued transistors sold today are fake. The exceptions are like needles in a big haystack, so don't even bother looking.
 
#10
Welcome said:
Motorola's 1302/3281 TO3 devices aren't particularly suited for audio use compared to Toshiba's parts with the same numbers.

The continuation of the Motorola TO3 parts are MJ21195 and MJ21196. Likewise, these are definitely not as good as Toshiba's audio devices, but the only option today if you want TO3.

All discontinued transistors sold today are fake. The exceptions are like needles in a big haystack, so don't even bother looking.
Click to expand...

Why are they not as good as 2SC3281/A1302? On what side? :dead:
 
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