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. 145-2655
Mfr. Part No.1N5221B-TR
BrandVishay
SGD0.053
Each (On a Reel of 10000)
units
Single 2.4V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 30Ω 100µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 811-5933
Mfr. Part No.1N5221B-TR
BrandVishay
SGD0.279
Each (In a Pack of 50)
units
Single 2.4V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 30Ω 100µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 818-5070
Mfr. Part No.TZX4V3B-TR
BrandVishay
SGD0.11
Each (In a Pack of 200)
units
Single 4.2V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 100Ω 5µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 159-6585
Mfr. Part No.TZX4V3B-TR
BrandVishay
SGD0.044
Each (On a Reel of 10000)
units
Single 4.2V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 100Ω 5µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 145-2656
Mfr. Part No.1N5223B-TR
BrandVishay
SGD0.05
Each (On a Reel of 10000)
units
Single 2.7V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 30Ω 75µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 811-5942
Mfr. Part No.1N5223B-TR
BrandVishay
SGD0.275
Each (In a Pack of 50)
units
Single 2.7V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 30Ω 75µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 811-5964
Mfr. Part No.1N5230B-TR
BrandVishay
SGD0.121
Each (In a Pack of 250)
units
Single 4.7V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 19Ω 5µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 165-6138
Mfr. Part No.SMZJ3804B-E3/52
BrandVishay
SGD0.235
Each (On a Reel of 750)
units
Single 43V Surface Mount 1 1.5 W DO-214AA (SMB) Voltage Regulator 5% 2 8.7mA 950Ω 5µA 4.57 x 3.94 x 2.24mm -
RS Stock No. 159-6362
Mfr. Part No.1N5230B-TR
BrandVishay
SGD0.029
Each (On a Reel of 10000)
units
Single 4.7V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 19Ω 5µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 177-7404
Mfr. Part No.1N5261B-TR
BrandVishay
SGD0.038
Each (On a Reel of 10000)
units
Single 47V Through Hole 1 500 mW DO-35 General Purpose 5% 2 2.7mA 105Ω 100nA 1.7 (Dia.) x 3.9mm -
RS Stock No. 811-6043
Mfr. Part No.1N5261B-TR
BrandVishay
SGD0.098
Each (In a Pack of 250)
units
Single 47V Through Hole 1 500 mW DO-35 General Purpose 5% 2 2.7mA 105Ω 100nA 1.7 (Dia.) x 3.9mm -
RS Stock No. 819-3891
Mfr. Part No.SMZJ3804B-E3/52
BrandVishay
SGD0.544
Each (In a Pack of 20)
units
Single 43V Surface Mount 1 1.5 W DO-214AA (SMB) Voltage Regulator 5% 2 8.7mA 950Ω 5µA 4.57 x 3.94 x 2.24mm -
RS Stock No. 145-1939
Mfr. Part No.BZX85C3V3-TAP
BrandVishay
SGD0.089
Each (On a Reel of 5000)
units
Single 3.3V Through Hole 1 1.3 W DO-41 Voltage Regulator 6% 2 80mA 20Ω 40µA 4.1 x 2.6 x 2.6mm -
RS Stock No. 177-7356
Mfr. Part No.BZX85B5V1-TR
BrandVishay
SGD0.091
Each (On a Reel of 5000)
units
Single 5.1V Through Hole 1 1.3 W DO-41 General Purpose 2% 2 45mA 10Ω 1µA 2.6 (Dia.) x 4.1mm -
RS Stock No. 159-6581
Mfr. Part No.TZX3V6A-TR
BrandVishay
SGD0.044
Each (On a Reel of 10000)
units
Single 3.5V Through Hole 1 500 mW DO-35 Voltage Regulator 3% 2 5mA 100Ω 5µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 918-9326
Mfr. Part No.SML4742-E3/61
BrandVishay
SGD0.429
Each (On a Reel of 1800)
units
Single 12V Surface Mount 1 1 W SMA - 10% 2 21mA 5µA 4.5 x 2.79mm -
RS Stock No. 159-6495
Mfr. Part No.BZX55C3V3-TAP
BrandVishay
SGD0.041
Each (On a Reel of 10000)
units
Single 3.3V Through Hole 1 500 mW DO-35 Voltage Regulator 6% 2 5mA 85Ω 2µA 3.9 x 1.7 x 1.7mm -
RS Stock No. 813-3846
Mfr. Part No.ZMY24-GS08
BrandVishay
SGD0.496
Each (In a Pack of 50)
units
Single 24V Surface Mount 1 1 W DO-213AB General Purpose 5% 2 25mA 14Ω 500nA 2.6 (Dia.) x 5.2mm -
RS Stock No. 812-8544
Mfr. Part No.BZX55B33-TR
BrandVishay
SGD0.109
Each (In a Pack of 250)
units
Single 33V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 80Ω 2µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 812-8702
Mfr. Part No.BZX85B3V0-TR
BrandVishay
SGD0.193
Each (In a Pack of 200)
units
Single 3V Through Hole 1 1.3 W DO-41 General Purpose 2% 2 80mA 20Ω 100µA 2.6 (Dia.) x 4.1mm -