20V 1/2W Zener Diode

The 20V 1/2W Zener Diode is a reliable component used for voltage regulation and protection in low-power electronic circuits. When reverse-biased and operated in its Zener breakdown region, it maintains a nearly constant voltage of 20 volts, making it suitable for voltage reference and clamping applications.

This Zener diode is widely used in power supply circuits, voltage stabilizers, signal conditioning stages, and over-voltage protection designs. It helps protect sensitive electronic components by limiting excess voltage and reducing the impact of voltage spikes or fluctuations.

With a 0.5-watt power dissipation rating, the diode is intended for low-current applications where stable voltage control is required without excessive heat generation. The through-hole package allows easy mounting on PCBs and breadboards, making it ideal for prototyping, repair work, educational electronics, and DIY projects.

For safe and reliable operation, a current-limiting resistor should always be used in series with the Zener diode to control current flow and prevent damage.

Key Technical Specifications Datasheet Snapshot

• Zener voltage: 20 V

• Power dissipation: 0.5 W (1/2W)

• Reverse breakdown voltage regulation

• Through-hole mounting

• Ideal for voltage reference and protection circuits

The 20V 1/2W Zener Diode provides a simple, dependable, and cost-effective solution for voltage stabilization and over-voltage protection in electronic systems.