Zener Diode Circuit Design Calculator
Calculate the series resistor for a Zener diode regulator using: $$ R = \frac{V_S – V_Z}{I_Z + I_L} $$
* Currents are entered in mA (converted to A internally). Use SI units throughout.
Step 1: Enter Circuit Parameters
e.g., 12 V
e.g., 5.1 V
e.g., 5 mA
e.g., 0 mA if no load is present