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. 180-7460
Mfr. Part No.TZM5233B-GS08
BrandVishay
£0.011
Each (On a Reel of 2500)
Units
- - - - - - - - - - - - - -
RS Stock No. 885-5524
Mfr. Part No.MMSZ5237BS-7-F
£0.068
Each (In a Pack of 100)
Units
Single 8.2V Surface Mount 1 200 mW SOD-323 General Purpose 5% 2 20mA 500Ω 3µA 1.8 x 1.4 x 1.1mm -
RS Stock No. 703-3625
Mfr. Part No.DZ2J12000L
BrandPanasonic
£0.008
Each (In a Pack of 50)
Units
Single 12V Surface Mount 1 200 mW SMini2 F5 B General Purpose 5% 2 5mA 80Ω 50nA 1.7 x 1.25 x 0.7mm -
New
RS Stock No. 215-9667
Mfr. Part No.CDZVT2R2.2B
BrandROHM
£0.022
Each (On a Reel of 8000)
Units
Isolated 2.4V Surface Mount - 100 mW SOD-923 Voltage Regulator - 2 - - - - -
RS Stock No. 190-6785
Mfr. Part No.SMA6J48A-TR
£0.122
Each (On a Reel of 5000)
Units
Single 48V Surface Mount 1 600 W DO-214AC (SMA) - - 2 - - 200nA 2.9 x 2.25 x 4.6mm -
New
RS Stock No. 218-6438
Mfr. Part No.PLZ10C-HG3_A/H
BrandVishay
£0.044
Each (In a Pack of 100)
Units
Single 10.2V Surface Mount 1 500 mW MicroSMF (DO-219AC) General Purpose - 2 - - - - -
RS Stock No. 178-7074
Mfr. Part No.BZV55-C4V3,115
BrandNexperia
£0.021
Each (On a Reel of 2500)
Units
Single 4.3V Surface Mount 1 500 mW MiniMELF Voltage Regulator 5% 2 5mA 90Ω 3µA 3.7 x 1.6 x 1.6mm -
RS Stock No. 122-2856
Mfr. Part No.BZX84C5V1S-7-F
£0.036
Each (On a Reel of 3000)
Units
Isolated 5.1V Surface Mount 2 200 mW SOT-363 (SC-88) General Purpose 6% 6 5mA 60Ω 2µA 2.2 x 1.35 x 1mm -
RS Stock No. 159-6364
Mfr. Part No.1N5235B-TR
BrandVishay
£0.018
Each (On a Reel of 10000)
Units
Single 6.8V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 3µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 151-2753
Mfr. Part No.BZX84-B3V9,215
BrandNexperia
£0.047
Each (In a Pack of 250)
Units
Single 3.9V Surface Mount 1 250 mW TO-236AB Voltage Regulator ±2% 3 5mA - - 3 x 1.4 x 1.1mm AEC-Q101
New
RS Stock No. 218-6473
Mfr. Part No.PLZ16C-HG3_A/H
BrandVishay
£0.031
Each (On a Reel of 4500)
Units
Single 16.51V Surface Mount 1 500 mW MicroSMF (DO-219AC) General Purpose - 2 - - - - -
RS Stock No. 802-4587
Mfr. Part No.MM3Z22VT1G
£0.009
Each (On a Tape of 200)
Units
Single 22V Surface Mount 1 300 mW SOD-323 Voltage Regulator 5% 2 5mA 55Ω 50nA 1.8 x 1.35 x 1mm -
RS Stock No. 151-2747
Mfr. Part No.BZX84-B22,215
BrandNexperia
£0.048
Each (In a Pack of 250)
Units
Single 22V Surface Mount 1 250 mW TO-236AB Voltage Regulator ±2% 3 5mA - - 3 x 1.4 x 1.1mm AEC-Q101
RS Stock No. 186-8935
Mfr. Part No.SZMMSZ5245BT1G
£0.036
Each (On a Reel of 3000)
Units
Single 15V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 8.5mA 600Ω 100nA 2.84 x 1.8 x 1.25mm AEC-Q101
RS Stock No. 170-8987
Mfr. Part No.MMSZ5237BS-7-F
£0.032
Each (On a Reel of 3000)
Units
Single 8.2V Surface Mount 1 200 mW SOD-323 General Purpose 5% 2 20mA 500Ω 3µA 1.8 x 1.4 x 1.1mm -
RS Stock No. 124-6764
Mfr. Part No.PTZTE2527B
BrandROHM
£0.09
Each (In a Pack of 50)
Units
Single 27V Surface Mount 1 1 W SOD-106 Voltage Regulator - 2 10mA 16Ω 10µA 4.7 x 2.8 x 2.2mm -
RS Stock No. 145-2011
Mfr. Part No.ZM4737A-GS08
BrandVishay
£0.068
Each (On a Reel of 1500)
Units
Single 7.5V Surface Mount 1 1 W DO-213AB General Purpose 5% 2 34mA 10µA 2.6 (Dia.) x 5.2mm AEC-Q101
RS Stock No. 816-0478
Mfr. Part No.BZX84J-C9V1,115
BrandNexperia
£0.075
Each (In a Pack of 150)
Units
Single 9.1V Surface Mount 1 550 mW SOD-323F General Purpose 5% 2 5mA - 500nA 1.8 x 1.35 x 0.8mm -
RS Stock No. 169-7342
Mfr. Part No.DFLZ30-7
£0.067
Each (On a Reel of 3000)
Units
Single 30V Surface Mount 1 1 W POWERDI123 General Purpose 5% 2 25mA 15Ω 1µA 3 x 1.93 x 1mm -
RS Stock No. 171-4709
Mfr. Part No.PDZVTR4.7B
BrandROHM
£0.212
Each (In a Pack of 50)
Units
Single 4.7V Surface Mount 1 1 W PMDTM, SOD-128 Voltage Regulator - 2 40mA 10Ω 20µA 3.9 x 2.7 x 1.05mm -