What is Zener voltage?
PhysicsClass 10CBSEAnswered 28 May 2026
Answer
Zener voltage (V_Z) is the specific reverse voltage at which a Zener diode begins conducting in the reverse direction while maintaining a nearly constant voltage.
- Below V_Z: diode blocks current.
- At/above V_Z: current flows freely in reverse, voltage stays constant at V_Z.
This voltage-clamping behaviour = ideal voltage regulators.
Common values: 3.3V, 5.1V, 6.2V, 12V.
Applications: Voltage regulation in power supplies, overvoltage protection, reference voltage circuits.
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