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. 138-6085
Mfr. Part No.B72724D0200A062
Each (On a Reel of 3000)
Array - Surface Mount 4 - 0612 (1632M) Transient Suppressor - 8 - - 1µA 3.4 x 1.75 x 0.9mm -
RS Stock No. 186-8928
Mfr. Part No.SZMM3Z12VT1G
Each (On a Reel of 3000)
Single 12V Surface Mount 1 300 mW SOD-323 Voltage Regulator - 2 5mA 80Ω 100nA 1.8 x 1.35 x 0.9mm AEC-Q101
RS Stock No. 822-2384
Mfr. Part No.DDZ9690-7
Each (In a Pack of 200)
Single 5.6V Surface Mount 1 500 mW SOD-123 General Purpose 5% 2 0.05mA - 2µA 2.85 x 1.7 x 1.35mm -
RS Stock No. 2508955352
Mfr. Part No.NTE5198A
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