In this article we will learn about the Difference between Transistors and Thyristors we will also disccuss about basic working of transistors and thyristors. We will know each and every difference between transistors and thyristors. We will know that how thyristor different from transistor also discussed based on their application.
Difference between Transistors and Thyristors
Transistors and Thyristors Difference base on Working.
1. Transistors is a three layer, Two junction device.
|Thyristor is a four layer , three junction device.|
|2.To keep a transistor in the conducting state, a continuous base current required.||In case of thyristor Its require a pulse to make it conducting and there after it remain conducting mode.|
|3. In case of Transistors. When transistors (power transistor) conduct appreciable current, the forward voltage drop is of the order of 0.3 to 0.8V.||In case of thyristors The forward voltage drop across the device is of the order of 1.2 to 2V.|
|4. The voltage and current ratings of transistors available at present are not as high as those of thyristors.||Due to the difference in fabrication and operation, thyristors with very high voltage and current ratings are available.|
|5. Power transistors have no surge current capacity and can withstand only a low rate of change of current.||Thyristor have surge-current rating and therefore can withstand high rateof change of current compared to transistors.|
|6. Commutation circuitry, which is costly and bulky, is not required.||In thyristor s device commutation circuit is required|
|7. Power transistors switch of faster than SCRs, and turn-off problems are practically nonexistent. If the base current is removed, the transistor turns off. Therefore, power-transistors can be used in very high-frequency applications.||Thyristors are used in comparatively low frequency applications.|
|8. Circuits using power transistors will be smaller in size and less costly compared to circuits using thyristors.||Comparatively larger than in size and is costlier. These are also a difference between transistors and thyristors.|
|9. There has been little operating experience in high power applications of transistors. Power transistors or Dearlington pair are more susceptible to failure.||Thyristor circuits, on the other hand, have a proven record of many years of reliable operation.|