Rating and Uses of Zener Diode

i)             Voltage Rating :

    Rating of zener diode is explained with respect to its zener voltage .(Vz).

Commonly , the zener diodes having zener rating of 1.8 volt to 2.00 volts are available in the market whose tolerance is 5 percent to 10 percent and sometimes upto 20 percent . anyhow , zener voltage depends upon doping level and temperature .

ii)            Power Rating :

Power rating of zener diode is a product of zener voltage and zener current .

Mathematically :

Pz = Vz   x  Iz

The power rating of common zener diode can be 150 m watt to 50 watt .

Uses of Zener Diode:

Zener Diode are used at a vast level in transistor circuitry , out of which few uses given below.

1. As a voltage regulator.
2. For protection from high voltage in meters.
3. To reshape a wave .
4. As peak clippers or voltage limiters .
5. For biasing and comparing in a network and to calibrate volt metes as a fixed reference.