Transistor B1185 Who faced?

Question

Electronics

I came across the other day, here is such a transistor, I soldered it from the Technics music center.
I found out that it seems like it is called 2SB1185. As I understand it is a power transistor.
I would like to clarify:

1. What is it appropriate to use it for?
   
2. Why is he so expensive?
   
3. Is there a diagram of its typical use?
   
4. Does it make sense to use it as a typical pnp bipolar transistor for experiments with arduino?
   

Looks like one of the data

Answer 1

Heh, digger :)
1. Put in a box - until you need it.
2. I don’t know, here is an approximate analogue (a little worse).
3. Find books by Horowitz-Hill, Titze-Shenk, start reading - and you will surely find there "a diagram of its typical use."
4. As a model - no, you have one.
No problem - no answer :)