Electronic component-Active components-circuit board pcb

- Feb 18, 2017-

Electronic component-Active components-

circuit board pcb

Active components



Various examples of Light-emitting diodes

Conduct electricity easily in one direction, among more specific behaviors.

  • Diode, Rectifier, Bridge rectifier

  • Schottky diode, hot carrier diode – super fast diode with lower forward voltage drop

  • Zener diode – Passes current in reverse direction to provide a constant voltage reference

  • Transient voltage suppression diode (TVS), Unipolar or Bipolar – used to absorb high-voltage spikes

  • Varactor, Tuning diode, Varicap, Variable capacitance diode – A diode whose AC capacitance varies according to the DC voltage applied.

  • Light-emitting diode (LED) – A diode that emits light

  • Photodiode – Passes current in proportion to incident light

    • Avalanche photodiode Photodiode with internal gain

    • Solar Cell, photovoltaic cell, PV array or panel, produces power from light

  • DIAC (Diode for Alternating Current), Trigger Diode, SIDAC) – Often used to trigger an SCR

  • Constant-current diode

  • Peltier cooler – A semiconductor heat pump

  • Tunnel diode - very fast diode based on quantum mechanical tunneling


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.

  • Transistors

    • Bipolar 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)

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