Transistor advantages and disadvantages

Basically, the transistor is nothing bur solid-state equivalent of a triode valve which was used in radio and early computers. It is made of three-layer semiconductor materials. Common semiconductor two materials in transistor construction are silicon and germanium. It basically acts as an insulator and a conductor. This page almost covers the advantages and disadvantages of the transistor to better understand this topic. 

Advantages of transistor:
  • It is used for fast switching applications
  • Smaller mechanical sensitivity
  • It is used as a current controlled current gain
  • It is available at very low cost
  • It is very smaller in size
  • Fast switching
  • It has a longer lifeLow operating voltage for greater safety, lower costs and  tighter clearances
  • Extremely long life
  • The transistor is very easy to turn ON and turn OFF the power transistor
  • The power transistor can carry large currents in ON state and it blocks very high voltage in OFF state mode
  • ON state voltage drops across power transistor is  very low
  • The power transistor can be operated at switching frequencies in the range of around 10 to 15 KHz
  • There is no power consumption by the cathode heater
  • It uses low voltage for its operation hence it offers more safety
  • It can be used to control the power delivered to the load in inverters and choppers
Disadvantages of transistor:
  • It has reverse blocking capacity is very low
  • It can be damaged due to the thermal runaway or second breakdown
  • Manufacturing techniques are very complex and require a clean room environment
  • Due to its small size, it is difficult to trace out faulty ones due to failure. Moreover, it is very difficult to unsolder and replace new ones
  • Power transistor cannot be operating satisfactorily above switching frequency of  around 15 KHz

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