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Zener Diode Calculator

It will calculate the series resistor for a zener diode so that:

Formula used is

Where:

Rs = (Vin - Vz) / Iload
Calculator by homemade-circuits.com

Zener Diode Resistor Calculator










Explanation (how it works):

So friends, here we first ask for 3 things:

Then using formula we calculate how much resistor we need to drop excess voltage and save the zener diode.

This resistor drops the extra volts and lets only safe current go into the zener and the load.

Also shows how much watts your zener will eat, so you do not use weak zener which can burn.

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