Zener Diodes

Zener diodes are a type of semiconductor device that has different characteristics from a normal diode. Zener diodes allow current to flow from its anode to its cathode in either a forward or reverse direction, but only when exposed to enough voltage.

How does a Zener diode work?

Zener diodes are designed to change the direction of the current flow once the voltage reaches a specific, defined voltage level. This also means that Zener diodes can operate continuously in a breakdown mode. The voltage level that changes the direction of flow is called Zener Voltage or Breakdown Voltage. It could be defined for specific diodes anywhere from 1.8 to 200 V.

Types of Zener diodes

Zener diodes are offered in an array of different configurations such as different levels of power dissipation, mount types, and different configurations.

There are also different types of Zener diodes such as:

  • Avalanche
  • Bi-Directional
  • ESD Protection
  • General Purpose
  • Ultra-small

Typical applications of Zener diodes?

Zener diodes are used in all kinds of electronic equipment and are used to protect circuits from overvoltage and electrostatic discharge or for switching applications. They are one of the basic building blocks of electronic circuits. Zener diodes work reliably in the breakdown region, unlike normal diodes which would overheat. They are the most common and handiest solutions to a number of needs in a circuit design.


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Description Price Diode Configuration Nominal Zener Voltage Mounting Type Number of Elements per Chip Maximum Power Dissipation Package Type Zener Type Zener Voltage Tolerance Pin Count Test Current Maximum Zener Impedance Maximum Reverse Leakage Current Dimensions Automotive Standard
RS Stock No. 756-0470
Mfr. Part No.CMZ27(T2L,TEM,Q)
BrandToshiba
SGD0.25
Each (In a Pack of 10)
units
Single 27V Surface Mount 1 2 W M-FLAT Voltage Regulator - 2 10mA 30Ω 10µA 3.8 x 2.4 x 0.98mm -
RS Stock No. 891-2721
Mfr. Part No.CRY68(TE85L,Q,M)
BrandToshiba
SGD0.609
Each (In a Pack of 25)
units
Single 6.8V Surface Mount 1 700 mW S-FLAT Transient Suppressor - 2 10mA 60Ω 10µA 2.6 x 1.6 x 0.98mm -
RS Stock No. 891-2724
Mfr. Part No.CRZ15(TE85L,Q,M)
BrandToshiba
SGD0.612
Each (In a Pack of 25)
units
Single 15V Surface Mount 1 700 mW S-FLAT Transient Suppressor - 2 10mA 30Ω 10µA 2.6 x 1.6 x 0.98mm -
RS Stock No. 756-0537
Mfr. Part No.DF3A6.8F(TE85L,F)
BrandToshiba
SGD0.423
Each (In a Pack of 10)
units
Common Anode 6.8V Surface Mount 2 150 mW SOT-346 (SC-59) ESD Suppressor - 3 5mA 25Ω 500nA 2.9 x 1.5 x 1.1mm -
RS Stock No. 756-0528
Mfr. Part No.CRY62(T5L,TEM,Q)
BrandToshiba
SGD0.187
Each (In a Pack of 10)
units
Single 6.2V Surface Mount 1 700 mW S-FLAT Voltage Regulator - 2 - 60Ω 10µA 2.6 x 1.6 x 0.98mm -
RS Stock No. 756-0530
Mfr. Part No.DF5A5.6F(TE85L,F)
BrandToshiba
SGD0.563
Each (In a Pack of 10)
units
Common Anode 5.6V Surface Mount 4 200 mW SMV ESD Suppressor - 5 5mA 40Ω 1µA 2.9 x 1.6 x 1.1mm -