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]
| Component type | Passive |
|---|---|
| Inventor | General Electric[1] |
| Pin names | anode, gate and cathode |
| Electronic symbol | |
 | |
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.
As of 2012 ON Semiconductor manufactures a part: 2N6027. 2N6028 was also made in the past.<ref name="electroschematics.com">
References
- ^ a b Jim Keith. "Programmable Unijunction Transistor Flasher".
- ^ "PUT - Programmable Unijunction Transistor - Working, Construction, Biasing - D&E notes". www.daenotes.com.
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