Programmable unijunction transistor
Appearance
Component type | Passive |
---|---|
Inventor | General Electric[1] |
Pin names | anode, gate and cathode |
Electronic symbol | |

Programmable unijunction transistor (PUT) is a three-lead electronic semiconductor device with which is similar in characteristic to unijunction transistor except that it is programmable.[2]
Construction
In construction, Programmable unijunction transistor is similar to Silicon controlled rectifier. It consists of four layers, two p-type layers and two n-type layers in equal proportion.[1]
Applications
- It is used to trigger Thyristors.
- It is also used as relaxing oscillator.