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. 818-5070
Mfr. Part No.TZX4V3B-TR
BrandVishay
£0.013
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
£0.013
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. 818-5086
Mfr. Part No.TZX4V7A-TR
BrandVishay
£0.054
Each (In a Pack of 200)
Units
Single 4.5V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 100Ω 5µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 177-7446
Mfr. Part No.TZX4V7A-TR
BrandVishay
£0.023
Each (On a Reel of 10000)
Units
Single 4.5V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 100Ω 5µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 818-5099
Mfr. Part No.TZX5V1B-TR
BrandVishay
£0.054
Each (In a Pack of 200)
Units
Single 5V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 100Ω 5µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 145-2285
Mfr. Part No.TZX5V1B-TR
BrandVishay
£0.02
Each (On a Reel of 10000)
Units
Single 5V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 100Ω 5µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 145-2259
Mfr. Part No.ZPY20-TR
BrandVishay
£0.048
Each (On a Reel of 5000)
Units
Single 20V Through Hole 1 1.3 W DO-41 General Purpose 5% 2 25mA 12Ω 500nA 2.6 (Dia.) x 5.2mm -
RS Stock No. 813-3912
Mfr. Part No.ZPY20-TR
BrandVishay
£0.097
Each (In a Pack of 100)
Units
Single 20V Through Hole 1 1.3 W DO-41 General Purpose 5% 2 25mA 12Ω 500nA 2.6 (Dia.) x 5.2mm -
RS Stock No. 145-2587
Mfr. Part No.BZX55C10-TAP
BrandVishay
£0.02
Each (On a Reel of 10000)
Units
Single 10V Through Hole 1 500 mW DO-35 Voltage Regulator 6% 2 5mA 70Ω 2µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 699-7789
Mfr. Part No.BZX55C10-TAP
BrandVishay
£0.052
Each (In a Pack of 250)
Units
Single 10V Through Hole 1 500 mW DO-35 Voltage Regulator 6% 2 5mA 70Ω 2µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 165-2928
Mfr. Part No.ZMY10-GS08
BrandVishay
£0.079
Each (On a Reel of 1500)
Units
Single 10V Surface Mount 1 1 W MELF Voltage Regulator 6% 2 50mA - 5.2 x 2.6 x 2.6mm -
RS Stock No. 710-4465
Mfr. Part No.ZMY10-GS08
BrandVishay
£0.256
Each (In a Pack of 25)
Units
Single 10V Surface Mount 1 1 W MELF Voltage Regulator 6% 2 50mA - 5.2 x 2.6 x 2.6mm -
RS Stock No. 699-7799
Mfr. Part No.BZX55C4V7-TAP
BrandVishay
£0.054
Each (In a Pack of 250)
Units
Single 4.7V Through Hole 1 500 mW DO-35 Voltage Regulator 6% 2 5mA 600Ω 10µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 918-9512
Mfr. Part No.BZX55C4V7-TAP
BrandVishay
£0.016
Each (On a Reel of 10000)
Units
Single 4.7V Through Hole 1 500 mW DO-35 Voltage Regulator 6% 2 5mA 600Ω 10µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 699-7830
Mfr. Part No.BZX85C16-TAP
BrandVishay
£0.099
Each (In a Pack of 100)
Units
Single 16V Through Hole 1 1.3 W DO-41 Voltage Regulator 6% 2 15mA 15Ω 500nA 2.5 (Dia.) x 4.1mm -
RS Stock No. 177-7365
Mfr. Part No.BZX85C16-TAP
BrandVishay
£0.048
Each (On a Tape of 5000)
Units
Single 16V Through Hole 1 1.3 W DO-41 Voltage Regulator 6% 2 15mA 15Ω 500nA 2.5 (Dia.) x 4.1mm -
RS Stock No. 699-7767
Mfr. Part No.BZT03C24-TAP
BrandVishay
£0.398
Each (In a Pack of 10)
Units
Single 24V Through Hole 1 3.25 W SOD-57 Transient Suppressor 6% 2 25mA 15Ω 1µA 3.6 (Dia.) x 4mm -
RS Stock No. 634-7181
Mfr. Part No.SML4744-E3/61
BrandVishay
£0.238
Each (In a Pack of 5)
Units
Single 15V Surface Mount 1 1 W SMA Voltage Regulator 10% 2 17mA 14Ω 5µA 4.5 x 2.79mm -
RS Stock No. 918-9329
Mfr. Part No.SML4744-E3/61
BrandVishay
£0.139
Each (On a Reel of 1800)
Units
Single 15V Surface Mount 1 1 W SMA Voltage Regulator 10% 2 17mA 14Ω 5µA 4.5 x 2.79mm -
RS Stock No. 699-7783
Mfr. Part No.BZX55C12-TAP
BrandVishay
£0.055
Each (In a Pack of 250)
Units
Single 12V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 90Ω 2µA 1.7 (Dia.) x 3.9mm -