Transistors were considered the invention of the twentieth century that changed electronic circuits forever. A transistor is a semiconductor device used to amplify and switch electronic signals and electrical power.
TransistorsBipolar junction transistor (BJT, or simply "transistor") – NPN or PNP
Photo transistor – Amplified photodetector
Darlington transistor – NPN or PNP
Photo Darlington – Amplified photodetector
Sziklai pair (Compound transistor, complementary Darlington)
Field-effect transistor (FET)
JFET (Junction Field-Effect Transistor) – N-CHANNEL or P-CHANNEL
MOSFET (Metal Oxide Semiconductor FET) – N-CHANNEL or P-CHANNEL
MESFET (MEtal Semiconductor FET)
HEMT (High electron mobility transistor)
Thyristors
Silicon-controlled rectifier (SCR) – Passes current only after triggered by a sufficient control voltage on its gate
TRIAC (TRIode for Alternating Current) – Bidirectional SCR
Unijunction transistor (UJT)
Programmable Unijunction transistor (PUT)
SIT (Static induction transistor)
SITh (Static induction thyristor)
Composite transistors
IGBT (Insulated-gate bipolar transistor)