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The power rating of a Zener diode indicates the maximum power that the diode can safely dissipate. In the formula below, power equals the voltage multiplied by the current. IZM is the maximum current that can flow through the diode, and PZM is the diode’s maximum power dissipation, and VZ is the Zener voltage.
This datasheet shows the ratings of different diodes which include Zener voltage, the tolerance range of Zener voltage, Zener current limits, the Maximum Power Dissipation, Maximum Operating Temperature, Maximum Zener Resistance or Impedance, etc.
Zener Diodes can be used to produce a stabilised voltage output with low ripple under varying load current conditions. By passing a small current through the diode from a voltage source, via a suitable current limiting resistor (RS), the zener diode will conduct sufficient current to maintain a voltage drop of Vout.
By using this Online Zener Diode Power Rating Calculator, one can easily calculate the resistor value, power rating and resistor power rating based on the input values of Source Voltage, Output Voltage and Maximum Current.
An indicator “B” stands for 2% tolerance, the character “C” for about 5%. Nexperia introduced a larger portfolio of Zener diodes with an “A” tolerance rating for the VZ, which means 1% accuracy in order to address a growing demand for higher precision. Diodes in packages SOT23, SOD323 and SOD123F can be chosen.
By using this Online Zener Diode Power Rating Calculator, one can easily calculate the resistor value, power rating and resistor power rating based on the input values of Source Voltage, Output Voltage and Maximum Current.
A Zener diode is a silicon semiconductor device that permits current to flow in either a forward or reverse direction. The diode consists of a special, heavily doped p-n junction, designed to conduct in the reverse direction when a certain specified voltage is reached.
