Active components

Semiconductors

Diodes

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

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