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. 170-4201
Mfr. Part No.BZT52B10 RH
HK$0.358
Each (On a Reel of 3000)
units
Single 10V Surface Mount 1 500 mW SOD-123F General Purpose 2% 2 5mA 20Ω - 2.7 x 1.7 x 1mm -
RS Stock No. 146-2264
Mfr. Part No.1N4749A R0
HK$0.776
Each (On a Reel of 5000)
units
Single 24V Through Hole 1 1 W DO-41 Voltage Regulator 5% 2 10.5mA 25Ω 5µA 5.2 x 2.7 x 2.7mm -
RS Stock No. 901-4165
Mfr. Part No.BZX85C56 R0
HK$1.483
Each (In a Pack of 250)
units
Single 56V Through Hole 1 - DO-41 General Purpose ±5% 2 4mA 120Ω 500nA 2.8 (Dia.) x 5.2mm -
RS Stock No. 748-5035
Mfr. Part No.BZV55C5V1 L1
HK$1.143
Each (In a Pack of 200)
units
Single 5.1V Surface Mount 1 500 mW MiniMELF Voltage Regulator 5% 2 5mA 35Ω 100nA 1.6 (Dia.) x 3.7mm -
RS Stock No. 169-9130
Mfr. Part No.1N4751A R0
HK$0.741
Each (On a Tape of 5000)
units
Single 30V Through Hole 1 1 W DO-41 Voltage Regulator 5% 2 8.5mA 40Ω 5µA 5.2 x 2.7 x 2.7mm -
RS Stock No. 687-5507
Mfr. Part No.BZD27C100P R3
HK$3.08
Each (In a Pack of 25)
units
Single 100V Surface Mount 1 800 mW Sub SMA Voltage Regulator 6% 2 4mA 200Ω 1µA 2.9 x 1.9 x 1.43mm -
RS Stock No. 748-5063
Mfr. Part No.BZX85C10 R0
HK$1.586
Each (In a Pack of 100)
units
Single 10V Through Hole 1 1.3 W DO-41 Voltage Regulator 5% 2 25mA 500nA 2.6 (Dia.) x 4.25mm -
RS Stock No. 796-9940
Mfr. Part No.BZT52B11 RH
HK$1.195
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. 687-5513
Mfr. Part No.BZD27C200P R3
HK$3.14
Each (In a Pack of 25)
units
Single 200V Surface Mount 1 800 mW Sub SMA Voltage Regulator 6% 2 4mA 750Ω 1µA 2.9 x 1.9 x 1.43mm -
RS Stock No. 748-5054
Mfr. Part No.BZX55C15 R0
HK$0.934
Each (In a Pack of 200)
units
Single 15V Through Hole 1 500 mW DO-35 Voltage Regulator 6% 2 5mA 30Ω 100nA 2.1 (Dia.) x 3.7mm -
RS Stock No. 169-9294
Mfr. Part No.BZV55C13 L1
HK$0.274
Each (On a Reel of 2500)
units
Single 13V Surface Mount 1 500 mW MiniMELF Voltage Regulator 5% 2 5mA 26Ω 100nA 1.6 (Dia.) x 3.7mm -
RS Stock No. 170-4233
Mfr. Part No.BZT52B7V5 RH
HK$0.416
Each (On a Reel of 3000)
units
Single 7.5V Surface Mount 1 500 mW SOD-123F General Purpose 2% 2 5mA 15Ω 900nA 2.7 x 1.7 x 1mm -
RS Stock No. 169-9022
Mfr. Part No.BZT55C4V7 L1
HK$0.317
Each (On a Reel of 2500)
units
Single 4.7V Surface Mount 1 500 mW Quadro MiniMelf Voltage Regulator 6% 2 5mA 60Ω 500nA 3.7 x 1.6 x 1.8mm -
RS Stock No. 146-2294
Mfr. Part No.BZX85C10 R0
HK$0.493
Each (On a Reel of 5000)
units
Single 10V Through Hole 1 1.3 W DO-41 Voltage Regulator 5% 2 25mA 500nA 2.6 (Dia.) x 4.25mm -
RS Stock No. 748-5001
Mfr. Part No.BZV55C13 L1
HK$1.014
Each (In a Pack of 200)
units
Single 13V Surface Mount 1 500 mW MiniMELF Voltage Regulator 5% 2 5mA 26Ω 100nA 1.6 (Dia.) x 3.7mm -
RS Stock No. 169-9297
Mfr. Part No.BZV55C3V3 L1
HK$0.274
Each (On a Reel of 2500)
units
Single 3.3V Surface Mount 1 500 mW MiniMELF Voltage Regulator 5% 2 5mA 85Ω 2µA 1.6 (Dia.) x 3.7mm -
RS Stock No. 169-9134
Mfr. Part No.BZD27C13P R3
HK$1.133
Each (On a Reel of 1800)
units
Single 13V Surface Mount 1 800 mW Sub SMA Voltage Regulator 6% 2 50mA 10Ω 2µA 2.9 x 1.9 x 1.43mm -
RS Stock No. 797-0164
Mfr. Part No.BZT52B7V5 RH
HK$0.679
Each (In a Pack of 250)
units
Single 7.5V Surface Mount 1 500 mW SOD-123F General Purpose 2% 2 5mA 15Ω 900nA 2.7 x 1.7 x 1mm -
RS Stock No. 687-5481
Mfr. Part No.1N4756A R0
HK$3.959
Each (In a Pack of 50)
units
Single 47V Through Hole 1 1 W DO-41 Voltage Regulator 5% 2 5.5mA 80Ω 5µA 5.2 x 2.7 x 2.7mm -
RS Stock No. 748-5045
Mfr. Part No.BZX55C10 R0
HK$0.952
Each (In a Pack of 200)
units
Single 10V Through Hole 1 500 mW DO-35 Voltage Regulator 6% 2 5mA 15Ω 100nA 2.1 (Dia.) x 3.7mm -