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. 162-8950
Mfr. Part No.MM3Z6V8T1G
£0.017
Each (On a Reel of 3000)
Units
Single 6.8V Surface Mount 1 300 mW SOD-323 Voltage Regulator 5% 2 5mA 15Ω 2µA 1.8 x 1.35 x 1mm -
RS Stock No. 171-4433
Mfr. Part No.PDZVTR8.2B
BrandROHM
£0.212
Each (In a Pack of 50)
Units
Single 8.2V Surface Mount 1 1 W PMDTM, SOD-128 Voltage Regulator - 2 40mA 20µA 3.9 x 2.7 x 1.05mm -
RS Stock No. 792-5341
Mfr. Part No.1SMA5928BT3G
£0.221
Each (In a Pack of 20)
Units
Single 13V Surface Mount 1 1.5 W SMA Voltage Regulator 5% 2 28.8mA 500nA 4.57 x 2.92 x 2.05mm -
RS Stock No. 712-5945
Mfr. Part No.DZ3X068D0L
BrandPanasonic
£0.132
Each (In a Pack of 20)
Units
Common Anode 6.8V Surface Mount 2 200 mW Mini3 G3 B Transient Suppressor 5% 3 5mA 60Ω 100nA 2.9 x 1.5 x 1.1mm -
RS Stock No. 822-2194
Mfr. Part No.BZT52C13-7-F
£0.05
Each (In a Pack of 200)
Units
Single 13V Surface Mount 1 500 mW SOD-123 General Purpose 7% 2 5mA 30Ω 100nA 2.85 x 1.7 x 1.35mm -
RS Stock No. 182-6981
Mfr. Part No.GDZ18LP3-7
£0.019
Each (On a Reel of 10000)
Units
- 18V Surface Mount 1 250 W X3-DFN0603 Ultra Small ±5% 2 5mA - 100nA 0.62 x 0.32 x 0.28mm AEC-Q101
RS Stock No. 184-4692
Mfr. Part No.BZX84C6V8LT1G
£0.03
Each (In a Pack of 250)
Units
Single 6.8V Surface Mount 1 300 mW SOT-23 Voltage Regulator ±5% 3 5mA 15Ω 2µA 3.04 x 1.4 x 1.01mm AEC-Q101
RS Stock No. 165-8753
Mfr. Part No.MMSZ5243B-7-F
£0.024
Each (On a Reel of 3000)
Units
Single 13V Surface Mount 1 500 mW SOD-123 General Purpose 5% 2 9.5mA 13Ω 500nA 2.85 x 1.7 x 1.35mm -
RS Stock No. 802-1825
Mfr. Part No.MMSZ2V4T1G
£0.013
Each (On a Tape of 200)
Units
Single 2.4V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 100Ω 50µA 2.84 x 1.8 x 1.25mm -
RS Stock No. 182-6947
Mfr. Part No.DZ9F11S92-7
£0.015
Each (On a Reel of 10000)
Units
- 11V Surface Mount 1 200 mW SOD-923 Ultra Small ±5% 2 5mA 60Ω 100nA 0.8 x 0.6 x 0.37mm -
RS Stock No. 171-5604
Mfr. Part No.TFZVTR2.2B
BrandROHM
£0.077
Each (In a Pack of 200)
Units
Single 2.22V Surface Mount 1 500 mW SC-108B, SOD-323HE, TUMD2M Voltage Regulator - 2 20mA 120Ω 120µA 2.1 x 1.5 x 0.8mm -
RS Stock No. 805-2790
Mfr. Part No.MMBZ5248ELT1G
£0.05
Each (On a Tape of 200)
Units
Single 18V Surface Mount 1 300 mW SOT-23 Voltage Regulator - 3 7mA 21Ω 100nA 3.04 x 1.4 x 1.01mm -
RS Stock No. 145-1994
Mfr. Part No.BZX85B7V5-TR
BrandVishay
£0.008
Each (On a Reel of 5000)
Units
Single 7.5V Through Hole 1 1.3 W DO-41 General Purpose 2% 2 35mA 1µA 2.6 (Dia.) x 4.1mm -
RS Stock No. 818-4951
Mfr. Part No.TZX18B-TR
BrandVishay
£0.052
Each (In a Pack of 200)
Units
Single 18V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 55Ω 1µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 826-7967
Mfr. Part No.UDZVTE-177.5B
BrandROHM
£0.048
Each (In a Pack of 200)
Units
Single 7.5V Surface Mount 1 200 mW SOD-323 General Purpose - 2 5mA 30Ω 500nA 1.7 x 1.25 x 0.7mm -
RS Stock No. 178-0436
Mfr. Part No.TFZVTR2.7B
BrandROHM
£0.077
Each (In a Pack of 200)
Units
Single 2.7V Surface Mount 1 - SOD-323HE Voltage Regulator - 2 20mA - 100µA 1.5 x 2.1 x 0.8mm -
RS Stock No. 121-9595
Mfr. Part No.DDZ9711-7
£0.012
Each (On a Reel of 3000)
Units
Single 27V Surface Mount 1 500 mW SOD-123 General Purpose 5% 2 0.05mA - 50nA 2.85 x 1.7 x 1.35mm -
RS Stock No. 182-1893
Mfr. Part No.BZV55-B33,115
BrandNexperia
£0.057
Each (In a Pack of 100)
Units
- - - - - - - - - - - - - -
RS Stock No. 133-2828
Mfr. Part No.RSB16VATR
BrandROHM
£0.082
Each (In a Pack of 50)
Units
Single 16V Surface Mount 1 500 mW SOD-323HE Bi-Directional - 2 - - 100nA 1.9 x 1.3 x 0.6mm -
RS Stock No. 182-1876
Mfr. Part No.BZX84-C43,215
BrandNexperia
£0.036
Each (In a Pack of 300)
Units
- - - - - - - - - - - - - -