Zener diode symbol
Also called Voltage reference diode
A diode made to conduct in reverse at a set voltage, the Zener voltage. The bent ends of the bar mark it.
ANSI / IEEE
IEC 60617
What the zener diode symbol means
A diode made to conduct in reverse at a set voltage, the Zener voltage. The bent ends of the bar mark it.
ANSI and IEC symbols
Where you see it
Voltage references, simple regulators and overvoltage clamps.
What is written next to it
On a schematic, the zener diode usually carries its designator and Zener voltage, such as ZD1 5.1 V.
Related symbols
Frequently asked questions
What does the zener diode symbol look like?
On ANSI drawings: A diode with a bar bent at both ends. In IEC 60617: The same bent bar.
Is the zener diode symbol the same in IEC and ANSI?
Yes, it is drawn the same way in most legends.
Where is a zener diode used?
Voltage references, simple regulators and overvoltage clamps.
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