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. 165-5004
Mfr. Part No.Z2SMB13 TRTB
SGD0.192
Each (On a Reel of 3200)
units
Single 13V Surface Mount 1 3 W DO-214AA (SMB) - ±5% 2 50mA 10Ω 1µA 5.1 x 3.5 x 2mm -
RS Stock No. 123-1409
Mfr. Part No.Z1SMA56 TRTB
SGD0.132
Each (In a Pack of 100)
units
Single 56V Surface Mount 1 3.25 W DO-214AC (SMA) - ±5% 2 10mA 60Ω 1µA 5.1 x 2.6 x 2mm -
RS Stock No. 123-1404
Mfr. Part No.Z1SMA18 TRTB
SGD0.201
Each (In a Pack of 100)
units
Single 18V Surface Mount 1 3.25 W DO-214AC (SMA) - ±5% 2 25mA 15Ω 1µA 5.1 x 2.6 x 2mm -
RS Stock No. 123-1410
Mfr. Part No.Z1SMA62 TRTB
SGD0.194
Each (In a Pack of 100)
units
Single 62V Surface Mount 1 3.25 W DO-214AC (SMA) - ±5% 2 10mA 80Ω 1µA 5.1 x 2.6 x 2mm -
RS Stock No. 165-5029
Mfr. Part No.Z1SMA16 TRTB
SGD0.126
Each (On a Reel of 7500)
units
Single 16V Surface Mount 1 3.25 W DO-214AC (SMA) - ±5% 2 25mA 15Ω 1µA 5.1 x 2.6 x 2mm -
RS Stock No. 123-1411
Mfr. Part No.Z1SMA68 TRTB
SGD0.154
Each (In a Pack of 100)
units
Single 68V Surface Mount 1 3.25 W DO-214AC (SMA) - ±5% 2 10mA 80Ω 1µA 5.1 x 2.6 x 2mm -
RS Stock No. 146-0633
Mfr. Part No.Z1SMA56 TRTB
SGD0.101
Each (On a Reel of 7500)
units
Single 56V Surface Mount 1 3.25 W DO-214AC (SMA) - ±5% 2 10mA 60Ω 1µA 5.1 x 2.6 x 2mm -
RS Stock No. 146-0634
Mfr. Part No.Z2SMB33 TRTB
SGD0.192
Each (On a Reel of 3200)
units
Single 33V Surface Mount 1 3 W DO-214AA (SMB) - ±5% 2 25mA 15Ω 1µA 5.1 x 3.5 x 2mm -
RS Stock No. 146-0631
Mfr. Part No.Z1SMA33 TRTB
SGD0.165
Each (On a Reel of 7500)
units
Single 33V Surface Mount 1 3.25 W DO-214AC (SMA) - ±5% 2 25mA 15Ω 1µA 5.1 x 2.6 x 2mm -
RS Stock No. 165-5022
Mfr. Part No.Z2SMB6V8 TRTB
SGD0.267
Each (On a Reel of 3200)
units
Single 6.8V Surface Mount 1 3 W DO-214AA (SMB) - ±5% 2 100mA 10µA 5.1 x 3.5 x 2mm -
RS Stock No. 165-5030
Mfr. Part No.Z1SMA18 TRTB
SGD0.172
Each (On a Reel of 7500)
units
Single 18V Surface Mount 1 3.25 W DO-214AC (SMA) - ±5% 2 25mA 15Ω 1µA 5.1 x 2.6 x 2mm -
RS Stock No. 123-1403
Mfr. Part No.Z1SMA16 TRTB
SGD0.163
Each (In a Pack of 100)
units
Single 16V Surface Mount 1 3.25 W DO-214AC (SMA) - ±5% 2 25mA 15Ω 1µA 5.1 x 2.6 x 2mm -
RS Stock No. 165-4999
Mfr. Part No.BZD27C120W TRTB
SGD0.144
Each (On a Reel of 10000)
units
Single 120V Surface Mount 1 1 W SOD123W - 0.06 2 5mA 300Ω 1µA 2.8 x 1.9 x 0.93mm -
RS Stock No. 123-1415
Mfr. Part No.Z2SMB33 TRTB
SGD0.233
Each (In a Pack of 100)
units
Single 33V Surface Mount 1 3 W DO-214AA (SMB) - ±5% 2 25mA 15Ω 1µA 5.1 x 3.5 x 2mm -
RS Stock No. 123-1413
Mfr. Part No.Z2SMB6V8 TRTB
SGD0.321
Each (In a Pack of 50)
units
Single 6.8V Surface Mount 1 3 W DO-214AA (SMB) - ±5% 2 100mA 10µA 5.1 x 3.5 x 2mm -
RS Stock No. 165-5025
Mfr. Part No.Z1SMA68 TRTB
SGD0.106
Each (On a Reel of 7500)
units
Single 68V Surface Mount 1 3.25 W DO-214AC (SMA) - ±5% 2 10mA 80Ω 1µA 5.1 x 2.6 x 2mm -
RS Stock No. 123-1422
Mfr. Part No.BZD27C120W TRTB
SGD0.172
Each (In a Pack of 10)
units
Single 120V Surface Mount 1 1 W SOD123W - 0.06 2 5mA 300Ω 1µA 2.8 x 1.9 x 0.93mm -
RS Stock No. 123-1414
Mfr. Part No.Z2SMB13 TRTB
SGD0.23
Each (In a Pack of 100)
units
Single 13V Surface Mount 1 3 W DO-214AA (SMB) - ±5% 2 50mA 10Ω 1µA 5.1 x 3.5 x 2mm -
RS Stock No. 165-5034
Mfr. Part No.Z1SMA62 TRTB
SGD0.162
Each (On a Reel of 7500)
units
Single 62V Surface Mount 1 3.25 W DO-214AC (SMA) - ±5% 2 10mA 80Ω 1µA 5.1 x 2.6 x 2mm -
RS Stock No. 123-1405
Mfr. Part No.Z1SMA33 TRTB
SGD0.197
Each (In a Pack of 100)
units
Single 33V Surface Mount 1 3.25 W DO-214AC (SMA) - ±5% 2 25mA 15Ω 1µA 5.1 x 2.6 x 2mm -