Electronics
Zener Diode Resistor Calculator
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Vin
Vz
Rs
Input voltage
V
Zener voltage
V
Load current
mA
Minimum zener current
mA
Zener power rating
W
Assumes a simple zener shunt regulator. Input variation, dynamic resistance, temperature, and minimum load requirements can change real voltage.
Suggested series resistor
270 Ω
No-load zener power: 0.13 W · Within rating
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Calculated max resistor
276 Ω
Loaded zener current
5.556 mA
No-load zener current
25.556 mA
Resistor power
0.176 W