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
New
RS Stock No. 218-6478
Mfr. Part No.PLZ18B-HG3_A/H
BrandVishay
£0.044
Each (In a Pack of 100)
Units
Single 17.7V Surface Mount 1 500 mW MicroSMF (DO-219AC) General Purpose - 2 - - - - -
RS Stock No. 818-7629
Mfr. Part No.TLZ24B-GS08
BrandVishay
£0.053
Each (In a Pack of 250)
Units
Single 24V Surface Mount 1 500 mW SOD-80 Voltage Regulator 3% 2 5mA 35Ω 40nA 3.7 x 1.6 x 1.6mm -
New
RS Stock No. 218-6514
Mfr. Part No.PLZ27D-HG3_A/H
BrandVishay
£0.044
Each (In a Pack of 100)
Units
Single 27.64V Surface Mount 1 500 mW MicroSMF (DO-219AC) General Purpose - 2 - - - - -
RS Stock No. 169-7925
Mfr. Part No.DZ2W15000L
BrandPanasonic
£0.074
Each (On a Reel of 3000)
Units
Single 15V Surface Mount 1 1 W Mini2 F3 B Voltage Regulator 5% 2 10mA 30Ω 10µA 2.6 x 1.6 x 0.7mm -
RS Stock No. 165-8822
Mfr. Part No.BZT52C51-7-F
£0.023
Each (On a Reel of 3000)
Units
Single 51V Surface Mount 1 500 mW SOD-123 General Purpose 6% 2 5mA 100Ω 100nA 2.85 x 1.7 x 1.35mm -
RS Stock No. 170-9032
Mfr. Part No.BZT585B7V5T-7
£0.031
Each (On a Reel of 3000)
Units
Single 7.5V Surface Mount 1 350 mW SOD-523 Precision ±2% 2 5mA 80Ω 1µA 1.3 x 0.9 x 0.65mm -
RS Stock No. 805-0252
Mfr. Part No.1N5257BTR
£0.032
Each (In a Pack of 200)
Units
Single 33V Through Hole 1 500 mW DO-35 General Purpose 5% 2 3.8mA 58Ω 100nA 1.91 (Dia.) x 4.56mm -
RS Stock No. 708-1895
Mfr. Part No.DZ23C5V6-7-F
£0.192
Each (In a Pack of 25)
Units
Common Cathode 5.6V Surface Mount 2 300 mW SOT-23 Voltage Regulator 5% 3 5mA 400Ω 100nA 3 x 1.4 x 1.1mm -
RS Stock No. 186-9171
Mfr. Part No.BZX84B9V1LT1G
£0.132
Each (In a Pack of 50)
Units
Single 9.1V Surface Mount 1 300 mW SOT-23 Voltage Regulator - 3 5mA 15Ω 500nA 3.04 x 1.4 x 1.01mm AEC-Q101
RS Stock No. 148-5694
Mfr. Part No.UFZVTE-1724B
BrandROHM
£0.023
Each (In a Pack of 250)
Units
Single 24.02V Surface Mount 1 500 mW SOD-323FL Voltage Regulator - 2 5mA 35Ω 200nA 1.8 x 1.35 x 0.9mm -
RS Stock No. 806-1794
Mfr. Part No.MM3Z15VB
£0.042
Each (In a Pack of 200)
Units
Single 15V Surface Mount 1 200 mW SOD-323F - 2% 2 5mA 28Ω 45nA 1.3 x 1.7 x 1mm -
RS Stock No. 171-5501
Mfr. Part No.TFZVTR16B
BrandROHM
£0.077
Each (In a Pack of 200)
Units
Single 15.25V Surface Mount 1 500 mW SC-108B, SOD-323HE, TUMD2M Voltage Regulator - 2 10mA 18Ω 200nA 2.1 x 1.5 x 0.8mm -
RS Stock No. 190-7571
Mfr. Part No.SMM4F28A-TR
£0.247
Each (In a Pack of 25)
Units
Single 28V Surface Mount 1 400 W StmiteFLAT - - 2 - - 200nA 3.1 x 0.95 x 2.05mm -
RS Stock No. 180-7191
Mfr. Part No.MMSZ5240B-E3-08
BrandVishay
£0.016
Each (In a Pack of 100)
Units
Single 10V Surface Mount 1 500 mW SOD-123 Small Signal ±5% 2 20mA 17Ω 3µA 2.85 x 0.45 x 1.25mm AEC-Q101
RS Stock No. 921-0947
Mfr. Part No.BZT585B6V2T-7
£0.054
Each (In a Pack of 100)
Units
Single 6.2V Surface Mount 1 350 mW SOD-523 Precision ±2% 2 5mA 150Ω 3µA 1.3 x 0.9 x 0.65mm -
RS Stock No. 145-1999
Mfr. Part No.BZX85B9V1-TR
BrandVishay
£0.045
Each (On a Reel of 5000)
Units
Single 9.1V Through Hole 1 1.3 W DO-41 General Purpose 2% 2 25mA 1µA 2.6 (Dia.) x 4.1mm -
RS Stock No. 151-3375
Mfr. Part No.BZX84J-B15,115
BrandNexperia
£0.016
Each (On a Reel of 3000)
Units
Single 15V Surface Mount 1 550 mW SC-90, SOD-323F General Purpose ±2% 2 5mA - - 1.8 x 1.35 x 0.8mm AEC-Q101
New
RS Stock No. 218-6488
Mfr. Part No.PLZ20D-HG3_A/H
BrandVishay
£0.031
Each (On a Reel of 4500)
Units
Single 20.72V Surface Mount 1 500 mW MicroSMF (DO-219AC) General Purpose - 2 - - - - -
RS Stock No. 170-4257
Mfr. Part No.BZX85C56 R0
£0.04
Each (On a Reel of 5000)
Units
Single 56V Through Hole 1 - DO-41 General Purpose ±5% 2 4mA 120Ω 500nA 2.8 (Dia.) x 5.2mm -
New
RS Stock No. 218-6506
Mfr. Part No.PLZ24D-HG3_A/H
BrandVishay
£0.044
Each (In a Pack of 100)
Units
Single 24.85V Surface Mount 1 500 mW MicroSMF (DO-219AC) General Purpose - 2 - - - - -