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. 170-3417
Mfr. Part No.1N5351BRLG
HK$1.082
Each (On a Reel of 4000)
units
Single 14V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 100mA 2.5Ω 1µA 8.89 x 3.68 x 3.68mm -
RS Stock No. 145-2219
Mfr. Part No.BZX85C6V2-TAP
BrandVishay
HK$0.538
Each (On a Reel of 5000)
units
Single 6.2V Through Hole 1 1.3 W DO-41 Voltage Regulator 6% 2 35mA 1µA 4.1 x 2.6 x 2.6mm -
RS Stock No. 463-379
Mfr. Part No.1N5333BG
HK$3.644
Each (In a Pack of 10)
units
Single 3.3V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 380mA 300µA 8.89 x 3.68 x 3.68mm -
RS Stock No. 166-0304
Mfr. Part No.BZX79-C8V2,113
BrandNexperia
HK$0.173
Each (On a Reel of 10000)
units
Single 8.2V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 15Ω 700nA 4.25 x 1.85 x 1.85mm -
RS Stock No. 625-6495
Mfr. Part No.1N5374BRLG
HK$4.432
Each (In a Pack of 5)
units
Single 75V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 20mA 45Ω 500nA 8.89 x 3.68 x 3.68mm -
RS Stock No. 178-7582
Mfr. Part No.MMSZ5248BT1G
HK$0.30
Each (On a Reel of 3000)
units
Single 18V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 7mA 21Ω 100nA 2.69 x 1.6 x 1.12mm -
RS Stock No. 163-2332
Mfr. Part No.1N5374BRLG
HK$1.22
Each (On a Reel of 4000)
units
Single 75V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 20mA 45Ω 500nA 8.89 x 3.68 x 3.68mm -
RS Stock No. 708-7896
Mfr. Part No.BZX55C6V8-TAP
BrandVishay
HK$0.658
Each (In a Pack of 250)
units
Single 6.8V Through Hole 1 500 mW DO-35 Voltage Regulator 6% 2 5mA 100nA 3.9 x 1.7 x 1.7mm -
RS Stock No. 816-0453
Mfr. Part No.BZX84J-C2V4,115
BrandNexperia
HK$0.714
Each (In a Pack of 150)
units
Single 2V Surface Mount 1 550 mW SOD-323F General Purpose 5% 2 5mA - 50µA 1.8 x 1.35 x 0.8mm -
RS Stock No. 145-4102
Mfr. Part No.MMSZ18T1G
HK$0.306
Each (On a Reel of 3000)
units
Single 18V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 45Ω 50nA 2.69 x 1.6 x 1.12mm -
RS Stock No. 805-0081
Mfr. Part No.1N4745ATR
HK$0.657
Each (In a Pack of 100)
units
Single 16V Through Hole 1 1 W DO-41 General Purpose 5% 2 15.5mA 16Ω 5µA 2.72 (Dia.) x 5.2mm -
RS Stock No. 751-3711
Mfr. Part No.BZT52C2V0-7-F
HK$0.665
Each (On a Tape of 250)
units
Single 2V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 100Ω 150µA 2.85 x 1.7 x 1.35mm -
RS Stock No. 165-7078
Mfr. Part No.1N5232B-TR
BrandVishay
HK$0.243
Each (On a Reel of 10000)
units
Single 5.6V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 11Ω 5µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 165-9970
Mfr. Part No.BZX84J-C2V4,115
BrandNexperia
HK$0.335
Each (On a Reel of 3000)
units
Single 2V Surface Mount 1 550 mW SOD-323F General Purpose 5% 2 5mA - 50µA 1.8 x 1.35 x 0.8mm -
RS Stock No. 544-4449
Mfr. Part No.BZX79-C8V2,113
BrandNexperia
HK$1.133
Each (In a Pack of 20)
units
Single 8.2V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 15Ω 700nA 4.25 x 1.85 x 1.85mm -
RS Stock No. 545-3190
Mfr. Part No.MMSZ5248BT1G
HK$1.649
Each (In a Pack of 20)
units
Single 18V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 7mA 21Ω 100nA 2.69 x 1.6 x 1.12mm -
RS Stock No. 145-2005
Mfr. Part No.ZM4728A-GS08
BrandVishay
HK$0.892
Each (On a Reel of 1500)
units
Single 3.3V Surface Mount 1 1 W DO-213AB General Purpose 5% 2 76mA 10Ω 100µA 2.6 (Dia.) x 5.2mm AEC-Q101
RS Stock No. 124-9922
Mfr. Part No.1N5357BRLG
HK$1.071
Each (On a Reel of 4000)
units
Single 20V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 65mA 500nA 8.89 x 3.68 x 3.68mm -
RS Stock No. 791-6189
Mfr. Part No.MMSZ4688T1G
HK$0.656
Each (In a Pack of 100)
units
Single 4.7V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 0.05mA - 10µA 2.84 x 1.8 x 1.35mm -
RS Stock No. 145-3296
Mfr. Part No.MMSZ4706T1G
HK$0.30
Each (On a Reel of 3000)
units
Single 19V Surface Mount 1 500 mW SOD-123 Voltage Regulator - 2 0.05mA - 50nA 2.84 x 1.8 x 1.25mm -