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Showing Results For: Zener Diodes

Zener Diodes

Zener or breakdown diodes are special semiconductor devices primarily designed to conduct current flow in both directions, especially in reverse order. It integrates the functionality of a standard diode in a forward bias; however, the reverse bias functionality makes it a popular semiconductor in various electronic applications. They incorporate unique characteristics, such as Zener voltage and maximum power handling, making them ideal for voltage regulation, overvoltage protection, signal limitation, and voltage reference applications in various electronic circuits. These characteristics are due to their p-n junction doping construction. Zener diodes come in multiple power levels and voltage ratings, accommodating different circuit needs.

The Working Principle of Zener Diodes:

The working principle of Zener diodes is based on the Zener effect, a phenomenon occurring in heavily doped p-n junctions. A narrow depletion region by the highly doped p-n junction in Zener diodes results in high electric field strength across the junction.

When a reverse voltage is applied to a Zener diode and increases beyond the Zener voltage, the electric field strength becomes sufficient to ionise the covalent bonds in the depletion region. This leads to generating electron-hole pairs, creating a current flow–Zener current.

The Difference Between a Zener Diode and a Common Diode:

Both Zener diodes and regular diodes are semiconductors; however, they differ based on their bias conduction and doping intensity. A standard diode is a semiconductor device that conducts in only a single direction, while zener diodes conduct in both (forward & reverse bias) directions. Furthermore, Zener diodes are highly doped, while common diodes are moderately doped.

Choosing the Best Zener Diode for Your Applications:

Selecting the best Zener diode depends on the specific requirements of your application. Here are some factors to consider when selecting a Zener diode:

  • Package Type
  • Zener voltage (Vz)
  • Power dissipation (Pd)
  • Zener impedance (Zz)
  • Maximum current (Iz)
  • Temperature Coefficient
  • Mounting Configuration
  • Voltage Tolerance
  • Availability and Cost
  • Brand.

Typical Applications of Zener Diodes: 

Zener diodes find applications in various facilities and electronic circuits. 

  • With a primary function of voltage regulation, Zener diodes also serve as voltage references, rectifiers, and oscillators in various applications. 
  • These semiconductors are also found in smart devices, such as smartphones and Android equipment, providing desired voltages. 
  • In addition, Zener diodes protect multiple electronics from fluctuating voltages and surges.

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KDZVTFTR33B, ROHM
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EDZVFHT2R9.1B, ROHM
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EDZVFHT2R33B, ROHM
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BZV55C5V6 L0G, Taiwan Semiconductor
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1N4744A, Taiwan Semiconductor
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1N4742A, Taiwan Semiconductor
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BZM55C16-TR, Vishay

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ZM4760A-GS08/BKN, Vishay Siliconix

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Automotive Zener Diodes 1W, ZM47xxA series The ZM47xxA series of 1W silicon planar zener diodes are AEC-Q101 qualified for automotive use. Power rating: 1W Tolerance: ±5% Package: DO-213AB (MELF) AEC-Q101 qualified RS Product Codes 813-3757 ZM4728A-GS08 Automotive 1W Zener Diode, 3.3V 813-3751 ZM4730A-GS08 Automotive 1W Zener Diode, 3.9V 813-3760 ZM4731A-GS08 Automotive 1W Zener Diode, 4.3V 813-3763 ZM4732A-GS08 Automotive 1W Zener Diode, 4.7V 919-4286 ZM4732A-GS08 Automotive 1W Zener Diode, 4.7V (Pack of 1500) 813-3767 ZM4733A-GS08 Automotive 1W Zener Diode, 5.1V 813-3776 ZM4734A-GS08 Automotive 1W Zener Diode, 5.6V 813-3779 ZM4735A-GS08 Automotive 1W Zener Diode, 6.2V 813-3773 ZM4736A-GS08 Automotive 1W Zener Diode, 6.6V 813-3782 ZM4737A-GS08 Automotive 1W Zener Diode, 7.5V 813-3785 ZM4738A-GS08 Automotive 1W Zener Diode, 8.2V 813-3789 ZM4739A-GS08 Automotive 1W Zener Diode, 9.1V 813-3798 ZM4740A-GS08 Automotive 1W Zener Diode, 10V 813-3791 ZM4742A-GS08 Automotive 1W Zener Diode, 12V 813-3795 ZM4743A-GS08 Automotive 1W Zener Diode, 13V 710-4051 ZM4744A-GS08 Automotive 1W Zener Diode, 15V 813-3805 ZM4745A-GS08 Automotive 1W Zener Diode, 16V 813-3808 ZM4747A-GS08 Automotive 1W Zener Diode, 20V 813-3802 ZM4748A-GS08 Automotive 1W Zener Diode, 22V 813-3814 ZM4751A-GS08 Automotive 1W Zener Diode, 30V 813-3818 ZM4752A-GS08 Automotive 1W Zener Diode, 33V 813-3827 ZM4753A-GS08 Automotive 1W Zener Diode, 36V 873-1092 ZM4760A-GS08 Automotive 1W Zener Diode, 68V Approvals AEC-Q101 Zener Diodes, Vishay Semiconductor
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BZX85B68-TR, Vishay

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BZT585B13T-7, DiodesZetex

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Zener Diodes 350mW, BZT585B Series, Diodes Inc Surface Mount Precision Zener Diodes ±2% Tolerance Flat Lead Low Profile Package Zener Diodes, Diodes Inc
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BZY93C18V-MAG, Magnatec

BZY93C18V-MAG, Magnatec

Zener Diodes 20W, BZY93 Series, Magnatec DO-4 package with 10-32UNF thread Stud Mount Zener Diodes, Magnatec
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KDZVTR3.9B, ROHM

KDZVTR3.9B, ROHM

Small, power mold type High ESD resistant
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BZX85C91-TR, Vishay

BZX85C91-TR, Vishay

Zener Diodes 1.3W, BZX85 Series, Vishay Semiconductor Silicon planar power Zener diodes Applications in stabilising and clipping circuits with high power rating Zener Diodes, Vishay Semiconductor
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