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. 136-4785
Mfr. Part No.BZX84-C9V1,215
BrandNexperia
£0.014
Each (On a Reel of 3000)
Units
Single 9.1V Surface Mount 1 250 mW SOT-23 Voltage Regulator ±5% 3 5mA 100 Ω @ 1 mA 500nA 3 x 1.4 x 1.1mm AEC-Q101
RS Stock No. 165-6259
Mfr. Part No.TZX5V1C-TR
BrandVishay
£0.022
Each (On a Reel of 10000)
Units
Single 5.1V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 100Ω 5µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 182-7185
Mfr. Part No.DZ9F3V6S92-7
£0.024
Each (In a Pack of 100)
Units
- 3.6V Surface Mount 1 200 mW SOD-923 Ultra Small ±5% 2 5mA 1000Ω 10µA 0.8 x 0.6 x 0.37mm -
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. 145-2735
Mfr. Part No.TZX15B-TR
BrandVishay
£0.023
Each (On a Reel of 10000)
Units
Single 15V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 40Ω 1µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 181-7362
Mfr. Part No.BZV55-B2V7,115
BrandNexperia
£0.038
Each (On a Reel of 2500)
Units
Single 2.75V Surface Mount 1 500 mW SOD-80C Voltage Regulator ±2% 2 5mA 100Ω 20µA 1.6 (Dia.) x 3.7mm -
RS Stock No. 186-9420
Mfr. Part No.SZBZX84C3V3LT1G
£0.036
Each (In a Pack of 100)
Units
Single 3.3V Surface Mount 1 300 mW SOT-23 Voltage Regulator - 3 5mA 95Ω 5µA 3.04 x 1.4 x 1.01mm AEC-Q101
New
RS Stock No. 218-6636
Mfr. Part No.PLZ8V2B-HG3_A/H
BrandVishay
£0.044
Each (In a Pack of 100)
Units
Single 8.19V Surface Mount 1 500 mW MicroSMF (DO-219AC) General Purpose - 2 - - - - -
RS Stock No. 182-1889
Mfr. Part No.BZV55-B3V9,115
BrandNexperia
£0.011
Each (In a Pack of 100)
Units
- - - - - - - - - - - - - -
RS Stock No. 153-2909
Mfr. Part No.PZU10DB2,115
BrandNexperia
£0.032
Each (In a Pack of 50)
Units
Dual 10V Surface Mount 2 250 mW SOT-353, TSSOP General Purpose ±2% 5 5mA - 0.1µA 2.2 x 1.35 x 1mm AEC-Q101
RS Stock No. 177-7619
Mfr. Part No.BZX84B10-E3-08
BrandVishay
£0.024
Each (On a Reel of 3000)
Units
Single 10V Surface Mount 1 300 mW SOT-23 General Purpose 2% 3 5mA 20Ω 200nA 3.1 x 1.43 x 1.05mm -
RS Stock No. 169-8650
Mfr. Part No.1N5240BTR
£0.016
Each (On a Reel of 5000)
Units
Single 10V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 17Ω 3µA 1.91 (Dia.) x 4.56mm -
RS Stock No. 826-7927
Mfr. Part No.TDZTR6.2
BrandROHM
£0.227
Each (In a Pack of 50)
Units
Single 6.2V Surface Mount 1 500 mW TUMD General Purpose - 2 10mA - 10µA 1.9 x 1.3 x 0.6mm -
RS Stock No. 181-7337
Mfr. Part No.BZX84-B9V1,215
BrandNexperia
£0.012
Each (On a Reel of 3000)
Units
Single 9.28V Surface Mount 1 250 mW SOT-23 Voltage Regulator ±2% 3 5mA 15Ω 500nA 3 x 1.4 x 1.1mm AEC-Q101
RS Stock No. 476-0166
Mfr. Part No.UDZSTE-17 5.1B
BrandROHM
£0.079
Each (In a Pack of 100)
Units
Single 5.1V Surface Mount 1 200 mW SOD-323F Voltage Regulator 2% 2 5mA 80Ω 2µA 1.7 x 1.25 x 0.7mm -
RS Stock No. 169-7890
Mfr. Part No.DZ2422000L
BrandPanasonic
£0.036
Each (On a Reel of 3000)
Units
Single 22V Surface Mount 1 2 W TMiniP2 F2 B Voltage Regulator 5% 2 10mA 30Ω 10µA 3.8 x 2.4 x 0.82mm -
RS Stock No. 151-2648
Mfr. Part No.BZT52H-C6V2,115
BrandNexperia
£0.011
Each (On a Reel of 3000)
Units
Single 6V Surface Mount 1 830 mW SOD-123F General Purpose - 2 5mA - - 2.7 x 1.7 x 1.2mm AEC-Q101
RS Stock No. 124-2302
Mfr. Part No.BZV55-C27,115
BrandNexperia
£0.022
Each (On a Reel of 2500)
Units
Single 27V Surface Mount 1 500 mW MiniMELF Voltage Regulator 5% 2 2mA 80Ω 50nA 3.7 x 1.6 x 1.6mm -
RS Stock No. 146-0484
Mfr. Part No.MMSZ5248BS-7-F
£0.041
Each (On a Reel of 3000)
Units
Single 18V Surface Mount 1 200 mW SOD-323 Voltage Regulator 5% 2 7mA 21Ω 100nA 1.8 x 1.4 x 1.1mm -
RS Stock No. 165-6227
Mfr. Part No.SML4751-E3/61
BrandVishay
£0.114
Each (On a Reel of 1800)
Units
Single 30V Surface Mount 1 1 W DO-214AC (SMA) General Purpose 10% 2 8.5mA 40Ω 5µA 4.5 x 2.79 x 2.087mm -