The 1W Zener Diode Pak is a versatile assortment for voltage regulation, voltage reference and circuit protection applications. It includes 300 Zener diodes in 30 voltage values ranging from 3V to 47V, providing a broad selection for electronics repair, prototyping, testing and component replacement.
With a 1W power rating, these Zener diodes can help stabilise voltage levels and protect sensitive components from excessive voltage. The 1W Zener Diode Pak is suitable for power supplies, voltage-clamping circuits, regulator boards, control systems, testing equipment and DIY electronic projects.
Zener Diode Symbol:

Zener Diode Structure:

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Zener Diode V-I Characteristics:

The VI characteristic of the Zener diode is shown in the figure below. When the diode is connected in forward bias, this diode work like a normal diode. But When a reverse voltage is applied across the diode. initially a small reverse saturation current Io flows across the diode. As the reverse voltage is increased, at a certain value of reverse voltage, the junction will be breakdown and drastically a large reverse current flow through the device. This breakdown is called Zener breakdown. The voltage at which this breakdown occurs is called Zener voltage.
Features:
- Stable voltage regulation
- Overvoltage protection
- High reliability
- Compact and lightweight
- Easy to integrate
- Cost-effective
- Versatile applications
Applications:
- Voltage Regulation - Maintains a stable output voltage in circuits
- Overvoltage Protection - Prevents excess voltage from damaging components
- Reference Voltage - Provides a stable reference for precise circuit operation
- Power Supply Circuits - Used in regulated power supplies for steady voltage output
- Signal Clipping & Shaping - Helps in waveform shaping and signal conditioning
- Surge Suppression - Protects sensitive electronics from voltage spikes
- Switching Circuits - Used in logic circuits for controlled switching
- Meter Protection - Prevents voltage surges from damaging measuring instruments
