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. 169-9126
Mfr. Part No.1N4742A R0
£0.068
Each (On a Tape of 5000)
Units
Single 12V Through Hole 1 1 W DO-41 Voltage Regulator 5% 2 21mA 5µA 5.2 x 2.7 x 2.7mm -
RS Stock No. 687-5459
Mfr. Part No.1N4742A R0
£0.312
Each (In a Pack of 50)
Units
Single 12V Through Hole 1 1 W DO-41 Voltage Regulator 5% 2 21mA 5µA 5.2 x 2.7 x 2.7mm -
RS Stock No. 146-2294
Mfr. Part No.BZX85C10 R0
£0.042
Each (On a Reel of 5000)
Units
Single 10V Through Hole 1 1.3 W DO-41 Voltage Regulator 5% 2 25mA 500nA 2.6 (Dia.) x 4.25mm -
RS Stock No. 748-5063
Mfr. Part No.BZX85C10 R0
£0.135
Each (In a Pack of 100)
Units
Single 10V Through Hole 1 1.3 W DO-41 Voltage Regulator 5% 2 25mA 500nA 2.6 (Dia.) x 4.25mm -
RS Stock No. 687-5453
Mfr. Part No.1N4744A R0
£0.336
Each (In a Pack of 50)
Units
Single 15V Through Hole 1 1 W DO-41 Voltage Regulator 5% 2 17mA 14Ω 5µA 5.2 x 2.7 x 2.7mm -
RS Stock No. 169-9125
Mfr. Part No.1N4744A R0
£0.072
Each (On a Reel of 5000)
Units
Single 15V Through Hole 1 1 W DO-41 Voltage Regulator 5% 2 17mA 14Ω 5µA 5.2 x 2.7 x 2.7mm -
RS Stock No. 169-9022
Mfr. Part No.BZT55C4V7 L1
£0.013
Each (On a Reel of 2500)
Units
Single 4.7V Surface Mount 1 500 mW Quadro MiniMelf Voltage Regulator 6% 2 5mA 60Ω 500nA 3.7 x 1.6 x 1.8mm -
RS Stock No. 169-9127
Mfr. Part No.1N4746A R0
£0.068
Each (On a Tape of 5000)
Units
Single 18V Through Hole 1 1 W DO-41 Voltage Regulator 5% 2 14mA 20Ω 5µA 5.2 x 2.7 x 2.7mm -
RS Stock No. 687-5462
Mfr. Part No.1N4746A R0
£0.336
Each (In a Pack of 50)
Units
Single 18V Through Hole 1 1 W DO-41 Voltage Regulator 5% 2 14mA 20Ω 5µA 5.2 x 2.7 x 2.7mm -
RS Stock No. 169-9137
Mfr. Part No.BZD27C200P R3
£0.079
Each (On a Reel of 1800)
Units
Single 200V Surface Mount 1 800 mW Sub SMA Voltage Regulator 6% 2 4mA 750Ω 1µA 2.9 x 1.9 x 1.43mm -
RS Stock No. 748-5045
Mfr. Part No.BZX55C10 R0
£0.081
Each (In a Pack of 200)
Units
Single 10V Through Hole 1 500 mW DO-35 Voltage Regulator 6% 2 5mA 15Ω 100nA 2.1 (Dia.) x 3.7mm -
RS Stock No. 169-9300
Mfr. Part No.BZX55C10 R0
£0.017
Each (On a Tape of 10000)
Units
Single 10V Through Hole 1 500 mW DO-35 Voltage Regulator 6% 2 5mA 15Ω 100nA 2.1 (Dia.) x 3.7mm -
RS Stock No. 687-5513
Mfr. Part No.BZD27C200P R3
£0.312
Each (In a Pack of 25)
Units
Single 200V Surface Mount 1 800 mW Sub SMA Voltage Regulator 6% 2 4mA 750Ω 1µA 2.9 x 1.9 x 1.43mm -
RS Stock No. 748-5039
Mfr. Part No.BZV55C5V6 L1
£0.099
Each (In a Pack of 200)
Units
Single 5.6V Surface Mount 1 500 mW MiniMELF Voltage Regulator 5% 2 5mA 25Ω 100nA 1.6 (Dia.) x 3.7mm -
RS Stock No. 169-9302
Mfr. Part No.BZX55C15 R0
£0.017
Each (On a Reel of 10000)
Units
Single 15V Through Hole 1 500 mW DO-35 Voltage Regulator 6% 2 5mA 30Ω 100nA 2.1 (Dia.) x 3.7mm -
RS Stock No. 748-5054
Mfr. Part No.BZX55C15 R0
£0.081
Each (In a Pack of 200)
Units
Single 15V Through Hole 1 500 mW DO-35 Voltage Regulator 6% 2 5mA 30Ω 100nA 2.1 (Dia.) x 3.7mm -
RS Stock No. 169-9299
Mfr. Part No.BZV55C5V6 L1
£0.027
Each (On a Reel of 2500)
Units
Single 5.6V Surface Mount 1 500 mW MiniMELF Voltage Regulator 5% 2 5mA 25Ω 100nA 1.6 (Dia.) x 3.7mm -
RS Stock No. 687-5481
Mfr. Part No.1N4756A R0
£0.312
Each (In a Pack of 50)
Units
Single 47V Through Hole 1 1 W DO-41 Voltage Regulator 5% 2 5.5mA 80Ω 5µA 5.2 x 2.7 x 2.7mm -
RS Stock No. 169-9131
Mfr. Part No.1N4756A R0
£0.068
Each (On a Reel of 5000)
Units
Single 47V Through Hole 1 1 W DO-41 Voltage Regulator 5% 2 5.5mA 80Ω 5µA 5.2 x 2.7 x 2.7mm -
RS Stock No. 748-5029
Mfr. Part No.BZV55C3V3 L1
£0.087
Each (In a Pack of 200)
Units
Single 3.3V Surface Mount 1 500 mW MiniMELF Voltage Regulator 5% 2 5mA 85Ω 2µA 1.6 (Dia.) x 3.7mm -