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. 215-9978
Mfr. Part No.UDZLVFHTE-17100
BrandROHM
£0.191
Each (In a Pack of 50)
Units
Isolated 100V Surface Mount - 200 mW SOD-323FL Voltage Regulator - 2 - - - - -
RS Stock No. 180-8233
Mfr. Part No.BZX384C15-E3-08
BrandVishay
£0.024
Each (On a Reel of 3000)
Units
- - - - - - - - - - - - - -
RS Stock No. 182-6984
Mfr. Part No.GDZ22LP3-7
£0.019
Each (On a Reel of 10000)
Units
- 22V 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. 816-7946
Mfr. Part No.BZX585-B6V8
BrandNexperia
£0.024
Each (In a Pack of 100)
Units
Single 6.8V Surface Mount 1 300 mW SOD-523 Voltage Regulator 2% 2 5mA 15Ω 2µA 1.25 x 0.85 x 0.65mm -
RS Stock No. 169-0485
Mfr. Part No.UMZ6.8NT106
BrandROHM
£0.073
Each (On a Reel of 3000)
Units
Common Anode 6.8V Surface Mount 2 200 mW UMD Voltage Regulator 5% 3 5mA 40Ω 500nA 2 x 1.25 x 0.9mm -
RS Stock No. 797-0060
Mfr. Part No.BZT52B3V9 RH
£0.091
Each (In a Pack of 250)
Units
Single 3.9V Surface Mount 1 500 mW SOD-123F General Purpose 2% 2 5mA 90Ω 2.7µA 2.7 x 1.7 x 1mm -
RS Stock No. 152-5543
Mfr. Part No.BZX84J-B12,115
BrandNexperia
£0.064
Each (In a Pack of 100)
Units
Single 12V Surface Mount 1 550 mW SC-90, SOD-323F General Purpose ±2% 2 5mA - - 1.8 x 1.35 x 0.8mm AEC-Q101
RS Stock No. 146-0505
Mfr. Part No.BZX585-B4V7,115
BrandNexperia
£0.035
Each (On a Reel of 3000)
Units
Single 4.7V Surface Mount 1 300 mW SOD-523 Voltage Regulator 2% 2 5mA 80Ω 3µA 1.25 x 0.85 x 0.65mm -
RS Stock No. 921-0940
Mfr. Part No.BZT585B6V8T-7
£0.054
Each (In a Pack of 100)
Units
Single 6.8V Surface Mount 1 350 mW SOD-523 Precision ±2% 2 5mA 80Ω 2µA 1.3 x 0.9 x 0.65mm -
RS Stock No. 184-1108
Mfr. Part No.SZMM3Z5V1ST1G
£0.049
Each (On a Reel of 3000)
Units
Single 5.2V Surface Mount 1 300 mW SOD-323 Voltage Regulator ±2% 2 5mA 500 Ω @ 0.5 mA, 60 Ω @ 5 mA 2µA 1.8 x 1.35 x 1mm AEC-Q101
RS Stock No. 180-8184
Mfr. Part No.1N4741A-TR
BrandVishay
£0.02
Each (On a Reel of 5000)
Units
- - - - - - - - - - - - - -
RS Stock No. 171-5661
Mfr. Part No.TFZVTR27B
BrandROHM
£0.077
Each (In a Pack of 200)
Units
Single 24.97V Surface Mount 1 500 mW SC-108B, SOD-323HE, TUMD2M Voltage Regulator - 2 5mA 45Ω 200nA 2.1 x 1.5 x 0.8mm -
RS Stock No. 826-7951
Mfr. Part No.UDZVTE-175.6B
BrandROHM
£0.052
Each (In a Pack of 200)
Units
Single 5.6V Surface Mount 1 200 mW SOD-323 General Purpose - 2 5mA 60Ω 1µA 1.7 x 1.25 x 0.7mm -
RS Stock No. 145-2273
Mfr. Part No.BZM55B7V5-TR
BrandVishay
£0.016
Each (On a Reel of 2500)
Units
Single 7.5V Surface Mount 1 500 mW MicroMELF Voltage Regulator 2% 2 5mA <7Ω <2µA 2 x 1.2 x 1.2mm -
RS Stock No. 145-2264
Mfr. Part No.ZPY56-TR
BrandVishay
£0.048
Each (On a Reel of 5000)
Units
Single 56V Through Hole 1 1.3 W DO-41 General Purpose 5% 2 10mA 100Ω 500nA 2.6 (Dia.) x 5.2mm -
RS Stock No. 180-7460
Mfr. Part No.TZM5233B-GS08
BrandVishay
£0.011
Each (On a Reel of 2500)
Units
- - - - - - - - - - - - - -
RS Stock No. 796-9940
Mfr. Part No.BZT52B11 RH
£0.008
Each (In a Pack of 250)
Units
Single 11V Surface Mount 1 500 mW SOD-123F General Purpose 2% 2 5mA 20Ω 90nA 2.7 x 1.7 x 1mm -
RS Stock No. 171-3964
Mfr. Part No.PDZVTR5.6B
BrandROHM
£0.073
Each (On a Reel of 3000)
Units
Single 5.6V Surface Mount 1 1 W PMDTM, SOD-128 Voltage Regulator - 2 40mA 20µA 3.9 x 2.7 x 1.05mm -
RS Stock No. 190-6750
Mfr. Part No.ESDA7P120-1U1M
£0.065
Each (On a Reel of 8000)
Units
Single 5.5V Surface Mount 1 - QFN Uni-Directional - 2 - - 1.5µA 1.6 x 0.55 x 1mm -
RS Stock No. 182-6949
Mfr. Part No.DZ9F12S92-7
£0.032
Each (On a Reel of 10000)
Units
- 12V Surface Mount 1 200 mW SOD-923 Ultra Small ±5% 2 5mA 80Ω 100nA 0.8 x 0.6 x 0.37mm -