Lets Discuss about the Differentiate between SCR (silicon controlled rectifier)/Thyristor and GTO (gate turn off thyristor)

SCR/Thyristor

1) The SCR stands for (silicon controlled rectifier)/Thyristor.

2) The SCR/Thyristor control only ON function.

3) The SCR/Thyristor uses only positive pulses.

4) In SCR/Thyristor there is need of bulky and costly commutation circuit, the limit it's use up to about 1kHz application.

5) The Value of latching current is comparatively less (the order of 100 to 500 mA)

6) The Reverse Voltage Blocking capability is more.

7) The turn off time can be divided into reverse recovery time and gate recovery time.

8) The gate triggering current is lower.

9) The efficiency of SCR circuit is low.

GTO 

1) The GTO stands for (gate turn off thyristor)

2) The GTO control both ON and OFF function.

3) The GTO uses both negative and positive pulses.

4) In GTO the commutation circuit is not required so therefore, it can be used beyond 1kHz application.

5) The Value of latching current is much more (The order of 2 to 4 A)

6) The Reverse Voltage Blocking capability is less.

7) The turn OFF time comprises of storage time, fall time and tail time.

8) The Gate triggering current is higher.

9) The efficiency of GTO circuit is more.