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. 136-4788
Mfr. Part No.BZX79-C5V1,133
BrandNexperia
PHP0.881
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Single 5.1V Through Hole 1 500 mW SOD27 (DO-35) Voltage Regulator ±2 %, ±5% 2 5mA 480 Ω @ 1 mA - 1.85 (Dia.) x 4.25mm -
RS Stock No. 544-3597
Mfr. Part No.BZX79-C5V1,113
BrandNexperia
PHP6.517
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Single 5.1V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 60Ω 2µA 4.25 x 1.85 x 1.85mm -
RS Stock No. 136-4856
Mfr. Part No.BZX79-C5V1,133
BrandNexperia
PHP3.706
Each (In a Pack of 100)
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Single 5.1V Through Hole 1 500 mW SOD27 (DO-35) Voltage Regulator ±2 %, ±5% 2 5mA 480 Ω @ 1 mA - 1.85 (Dia.) x 4.25mm -
RS Stock No. 103-7574
Mfr. Part No.BZX79-C5V1,113
BrandNexperia
PHP0.989
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Single 5.1V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 60Ω 2µA 4.25 x 1.85 x 1.85mm -
RS Stock No. 179-1180
Mfr. Part No.BZX79-C33,113
BrandNexperia
PHP0.989
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Single 33V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 2mA 80Ω 50nA 4.25 x 1.85 x 1.85mm -
RS Stock No. 544-4506
Mfr. Part No.BZX79-C33,113
BrandNexperia
PHP5.804
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Single 33V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 2mA 80Ω 50nA 4.25 x 1.85 x 1.85mm -
RS Stock No. 509-730
Mfr. Part No.BZX79-C30,113
BrandNexperia
PHP3.14
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Single 30V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 2mA 80Ω 50nA 4.25 x 1.85 x 1.85mm -
RS Stock No. 544-4449
Mfr. Part No.BZX79-C8V2,113
BrandNexperia
PHP8.113
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Single 8.2V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 15Ω 700nA 4.25 x 1.85 x 1.85mm -
RS Stock No. 179-1175
Mfr. Part No.BZX79-C30,113
BrandNexperia
PHP0.978
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Single 30V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 2mA 80Ω 50nA 4.25 x 1.85 x 1.85mm -
RS Stock No. 166-0304
Mfr. Part No.BZX79-C8V2,113
BrandNexperia
PHP1.269
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Single 8.2V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 15Ω 700nA 4.25 x 1.85 x 1.85mm -
RS Stock No. 103-3897
Mfr. Part No.1N5333BRLG
Brandonsemi
PHP8.127
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Single 3.3V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 380mA 300µA 8.89 x 3.68 x 3.68mm -
RS Stock No. 463-379
Mfr. Part No.1N5333BG
Brandonsemi
PHP26.354
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Single 3.3V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 380mA 300µA 8.89 x 3.68 x 3.68mm -
RS Stock No. 625-6445
Mfr. Part No.1N5333BRLG
Brandonsemi
PHP32.318
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Single 3.3V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 380mA 300µA 8.89 x 3.68 x 3.68mm -
RS Stock No. 100-9507
Mfr. Part No.1N5333BG
Brandonsemi
PHP8.987
Each (In a Box of 1000)
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Single 3.3V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 380mA 300µA 8.89 x 3.68 x 3.68mm -
RS Stock No. 509-235
Mfr. Part No.BZX384-C5V1,115
BrandNexperia
PHP5.502
Each (In a Pack of 100)
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Single 5.1V Surface Mount 1 300 mW UMD Voltage Regulator 5% 2 5mA 60Ω 2µA 1.8 x 1.35 x 1.05mm -
RS Stock No. 544-4556
Mfr. Part No.BZV55-C15,115
BrandNexperia
PHP9.252
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Single 15V Surface Mount 1 500 mW MiniMELF Voltage Regulator 5% 2 5mA 30Ω 50nA 3.7 x 1.6 x 1.6mm -
RS Stock No. 166-1366
Mfr. Part No.BZX384-C5V1,115
BrandNexperia
PHP2.73
Each (On a Reel of 3000)
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Single 5.1V Surface Mount 1 300 mW UMD Voltage Regulator 5% 2 5mA 60Ω 2µA 1.8 x 1.35 x 1.05mm -
RS Stock No. 124-2301
Mfr. Part No.BZV55-C15,115
BrandNexperia
PHP1.794
Each (On a Reel of 2500)
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Single 15V Surface Mount 1 500 mW MiniMELF Voltage Regulator 5% 2 5mA 30Ω 50nA 3.7 x 1.6 x 1.6mm -
RS Stock No. 687-8143
Mfr. Part No.1SMA5921BT3G
Brandonsemi
PHP19.089
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Single 6.8V Surface Mount 1 500 mW SMA Voltage Regulator 5% 2 55.1mA 2.5Ω 2.5µA 4.32 x 2.6 x 2mm -
RS Stock No. 103-5049
Mfr. Part No.1N5341BRLG
Brandonsemi
PHP7.413
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Single 6.2V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 200mA 1µA 8.89 x 3.68 x 3.68mm -