Calculate series resistor for Zener regulator.
A Zener regulator needs a series resistor to limit current through the Zener diode and load.
The calculator applies the formula above to the values entered in the form and returns the calculated engineering result instantly.
Use this for simple voltage references and low-current regulators.
This online calculator is intended for fast engineering estimates. For production hardware, verify the result with datasheets, manufacturer recommendations and real measurements.
Calculate resistor value for Zener diode regulator circuits. This tool is designed for fast electronics engineering estimates directly in the browser.
Enter the known values, press Calculate and compare the result with your design requirements. For reliable hardware, always check component datasheets, tolerances, temperature limits and manufacturer recommendations.
Is this calculator suitable for production design?
It is useful for estimates and early design work. Final production designs should be verified with real measurements and datasheets.
Does the calculator work on mobile?
Yes. EngiCalc tools are lightweight, responsive and designed to work on desktop and mobile devices.