PUT full form

What is the full form of PUT?


Answer : 

  • Programmable Uni Junction Transistor

What does PUT mean?


In a PUT, G is always biased positive with respect to the cathode. When the anode voltage exceeds the gate voltage by near about 0.7 V, Junction gets forward biased and PUT turn on. When anode voltage becomes less than gate voltage, PUT is become turn off. 

It is a PNPN device like SCR, but the major difference is that the gate is connected to n-types material near the anode. 

PUT is used mainly in time delay, logic as well as SCR trigger circuits.





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