- A Gallium Arsenide diode can be forward biased and used as a light-emitting diode (LED)
- When a Zener diode is reverse biased a constant voltage appears across it terminals; it is used to set and stabilise the output voltage of power supplies
- A reverse-biased photodiode conducts when exposed to light and can act as a switch
- A varicap diode has a capacitance that varies with reverse voltage; it can be used in a tuning circuit