Zener diodes are useful for creating a reference voltage or as a voltage stabilizer for low-current applications.
Features
Voltage Regulation: The defining characteristic is its ability to maintain a nearly constant voltage (the Zener voltage, Vz) across its terminals once the reverse breakdown threshold is reached, even with variations in current or input voltage. Power Dissipation: A power rating of 1W (one watt) means it can handle a relatively high amount of power compared to lower-wattage diodes (like 0.5W versions), making it suitable for more demanding low-current applications. Operating Mode: It is designed to function in the reverse-bias direction, unlike a standard diode which is typically damaged by reverse breakdown. Construction: Often packaged in a durable, hermetically sealed DO-41 axial package for through-hole mounting, with a band indicating the cathode side. Tolerance: Zener diodes typically have a standard voltage tolerance of ±5%, providing consistent performance. Temperature Range: Engineered for durability, these diodes can operate efficiently across a wide temperature range, often from -65°C to +200°C.