Zener Diode Calculator
Calculate series current from supply voltage, Zener voltage, and series resistance in a simple Zener shunt circuit.
A QUICK WALKTHROUGH
How to use this tool
- Enter values in the stated matching units.
- Review the idealized formula and scope.
- Calculate locally in your browser.
Formula and limits
Iseries=(Vin−Vz)/R. This does not calculate load current, resistor power, diode dissipation, ratings, or regulation. This is not a regulatory limit, equipment rating, or circuit safety review.
Privacy
Inputs are calculated locally and not uploaded.
GOOD TO KNOW
Common questions
Does this certify capacity or component suitability?
No. It evaluates the stated equation only.