2SC2362/2A1016 Transistors - K version?

[PreCD]

I have found some Sanyo 2SC2362 and 2A1016 transistors, rated G. (nice!) They are both trailed by the letter K. Example is 2SC2362K. What is the difference in 2SC2362K and a 2SC2362 transistor?

[mos57]

K version has upper Vcbo and Vceo than base version:

2SC2362 Vcbo:120 V 2SC2362K Vcbo=150 V

2SC2362 Vceo:100 V 2SC2362K Vceo=120 V

[PreCD]

Originally Posted by mos57

K version has upper Vcbo and Vceo than base version:

2SC2362 Vcbo:120 V 2SC2362K Vcbo=150 V

2SC2362 Vceo:100 V 2SC2362K Vceo=120 V

Thank you mos57. Forgive me as I am learning about transistors at this time. Would the K version be better because it has upper Vcbo and Veco than the base version? For instance my amp has the 2SC2362 as differential pairs. Would using a K version be advantageous?

[mos57]

None other advantages, if anything, the opposite.

Best regards, Francesco.

[PreCD]

Thank you Francesco.

The best to you also,
Kevin

[PreCD]

Well I was hoping for 2SC2362 G rated. I got about 10 2SC2362K G rated and 10 F rated. Just cost me $10 so I will move on to the next seller and see if I can come up with enough 2SC2362 Gs to match 2 diff pairs for my power amp.

[anatech]

The markings on those are odd. The ones I have bought are laser etched, not printed like yours are. These are either extremely old, or re-marked from something else. The first ones you show seem to be missing a letter code for breakdown voltage - maybe that's normal, but I haven't ever seen one of these without a complete date code or hFE rating. I'm really not too sure about the first ones. If I had received ones like in your second picture, I'd be checking beta first off.

I have attached the data sheet for this part. I hope this helps you out.

-Chris

[PreCD]

Thanks for the response Chris. Below is a picture of the existing transistors. The labeling does look more like a laser engraving on those however the codes are relatively the same as the 1st in my picture above. I am still searching for 20 or so to be able to match them with the curve tracer.

[anatech]

Okay, those match in appearance. They must have been manufactured way back in time. That's ooold stock!

Once you have matched pairs, make sure you have them in thermal contact and held together. A match doesn't work if they are allowed to vary in temperature independently. Also, you don't need a curve tracer to do this. Just use a jig and run the expected tail current through them. Look for a balanced condition for your match. If you want to go all out, try a couple different tail current levels. Personally, I find that a curve tracer is good for checking a wide range of operating conditions. Remember that the operating point in this circuit is pretty much fixed when using a matched pair. The operation of a long tailed pair will linearise their transfer characteristic. With newer production parts, you will have more matches simply because they have the production process under better control. The parts will be more alike as long as you are picking from the same batch. Wouldn't it be nice if you could buy from the same wafer?

-Chris