Electrical & Electronics
Zener Diode & Series Resistor Calculator
Choose or check a Zener regulator resistor across supply and load extremes, including tolerance and power.
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Your inputs
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Your results
- Resistance
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- Recommended resistor
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- Allowed nominal resistance range
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- Minimum Zener current estimate
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- Maximum Zener current estimate
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- Worst-case Zener dissipation
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- Resistor dissipation
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- Suggested resistor rating
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Formula
—How to use this tool
- Calculation mode · Supply voltage · Zener voltage
- Minimum load current · Maximum load current · Required minimum Zener current
- Your results · Resistor dissipation · Print results