Is the 2t926a transistor suitable for an adjustable power supply unit?

Question

Electronics

I got 2t926a for free , will they suit me for a homemade laboratory power supply?
Description: link to description

• Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . npn
  
• Max. e.g. k-b at a given reverse current to and open circuit e. (Ukbo max), V. . . . 150
  
• Max. e.g. k-e at a given current to and a given resist. in the chain b-e. (Uker max), V. . . . . . . . 150
  
• The maximum allowable current to ( Ik max, A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . fifteen
  
• Static current transfer coefficient h21e min. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
  
• The cutoff frequency of the current transfer coefficient fgr, MHz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51.00
  
• Maximum dissipated power k (Pk, W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . fifty
  
• Frame. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . KT-17
  

Judging by the rating, they seem to fit, but I don’t even know what to look for when choosing a transistor to adjust the voltage drop across it. And confuses the low gain.
The block will have the following parameters:

• Voltage 0-15V rarely up to 0-30V.
  
• Current up to 12A
  

In the power supply I will use:

• Transformer TS-160-3 link to description
  
• Two diode bridges based on KD2999V link to description
  
• Capacitors K50-18 50V 10000uF -20% + 50% there are 3 pcs link to description
  

If it doesn’t make it difficult, explain which transistor to adjust the voltage is better to take, which bipolar, and which field, from domestic and imported. (domestic ones are somehow closer due to the margin of reliability and cheapness). If it doesn't make it difficult to explain what parameters, in addition to the case, heat sink, volt-ampere characteristics, gain, should you pay attention to?
Thank you in advance for your help.

Answer 1

bipolar transistors are bad because
1) they are controlled by current
2) they have a minimum voltage drop from 0.7 to 2 volts (for silicon ones)
3) field workers are afraid of a short circuit
, in turn, they are good because
1) this is a voltage-controlled resistor
2) energy is consumed only for change in state
3) they are more relaxed about short circuit
4) you can turn it on in parallel without bothering much with the selection and body kit
- disadvantages are usually more expensive and require a driver,
but they are completely solved by the fact that you can go to a flea market and buy a dead mother in which there will already be everything you need to create an impulse DC-DC converter down for mere pennies.