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High Electron Mobility Transistors (HEMTs)

Topics Covered: Indigenization of technology and developing new technology.

High Electron Mobility Transistors (HEMTs):


Indian scientists have developed a highly reliable HEMT from gallium nitride (GaN).


  • This is the first-ever indigenous HEMT device and is useful in electric cars, locomotives, power transmission and other areas requiring high voltage and high-frequency switching.
  • This would reduce the cost of importing such stable and efficient transistors required in power electronics.
  • It will also make India self-reliant in power transistor technology.

What are HEMTs?

High Electron Mobility Transistor (HEMT) is a normally OFF device and can switch currents up to 4A and operates at 600 V.

HEMTs are used in integrated circuits as digital on-off switches.

  • HEMT transistors are able to operate at higher frequencies than ordinary transistors, up to millimeter wave frequencies, and are used in high-frequency products such as cell phones, satellite television receivers, voltage converters, and radar equipment.
  • They are widely used in satellite receivers, in low power amplifiers and in the defense industry.


Prelims Link:

  1. What are HEMTs?
  2. How are they different from regular transistors?
  3. Benefits.
  4. Applications.

Sources: PIB.