Zener Diode and Resistor Voltage Regulator Design Calculator

Instrumentation and Electrical Design

This calculator will determine the various design parameters for a zener diode resistor voltage regulator.

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.

Zener Diode Voltage Regulator

Zener Diode + Resistor, Voltage Regulation  
  Zener ZD1 Volts      
  ZD1 Voltage Tolerance %      
  Resistor R1 Ohms      
  Supply Voltage Volts      
  Required O/P Current A      
ZD1 Max Voltage Volts ZD1 Min Voltage Volts  
Current in R1 = (Supply Voltage - Zener Voltage) / R, or Required Output Current  
  R1 A   R1 A  
Output Voltage Volts Output Voltage Volts  
  ZD1 current A ZD1 current A  
Output Current A Output Current A  
  R1 Watts   R1 Watts  
  ZD1 Watts   ZD1 Watts