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. 800-8869
Mfr. Part No.1N5953BRLG
HK$2.657
Each (In a Pack of 50)
units
Single 150V Through Hole 1 3 W Case 59-10 Voltage Regulator 5% 2 2.5mA 600Ω 250nA 2.7 (Dia.) x 5.2mm -
RS Stock No. 800-8793
Mfr. Part No.1N5384BRLG
HK$3.298
Each (In a Pack of 50)
units
Single 160V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 8mA 350Ω 500nA 3.68 (Dia.) x 8.89mm -
RS Stock No. 816-6791
Mfr. Part No.PLVA662A,215
BrandNexperia
HK$2.226
Each (In a Pack of 50)
units
Single 6.2V Surface Mount 1 250 mW SOT-23 Avalanche 3% 3 0.25mA - 100nA 3 x 1.4 x 1mm -
RS Stock No. 774-3325
Mfr. Part No.1N5388BG
HK$3.956
Each (In a Pack of 10)
units
Single 200V Through Hole 1 5 W Surmetic 40 Voltage Regulator 5% 2 5mA 480Ω 500nA 3.68 (Dia.) x 8.89mm -
RS Stock No. 805-7124
Mfr. Part No.SZMMSZ18T1G
HK$0.962
Each (In a Pack of 100)
units
Single 18V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 45Ω 50nA 2.84 x 1.8 x 1.25mm -
RS Stock No. 654-7606
Mfr. Part No.1N5351BRLG
HK$4.494
Each (In a Pack of 5)
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. 634-7030
Mfr. Part No.SML4740-E3/61
BrandVishay
HK$3.754
Each (In a Pack of 5)
units
Single 10V Surface Mount 1 1 W SMA - 10% 2 25mA 10µA 4.6 x 2.9mm -
RS Stock No. 186-9308
Mfr. Part No.1N5366BG
HK$3.801
Each (In a Pack of 25)
units
Single 39V Through Hole 1 5 W CASE 017AA Voltage Regulator ±5% 2 30mA 170Ω 500nA 3.68 (Dia.) x 8.89mm -
RS Stock No. 509-548
Mfr. Part No.BZX84-C6V8,215
BrandNexperia
HK$0.432
Each (In a Pack of 200)
units
Single 6.8V Surface Mount 1 250 mW SOT-23 (TO-236AB) Voltage Regulator 5% 3 5mA 15Ω 2µA 3 x 1.4 x 1mm -
RS Stock No. 184-4137
Mfr. Part No.1N5245B
HK$0.207
Each (In a Bag of 5000)
units
Single 15V Through Hole 1 500 mW DO-35 General Purpose 5% 2 8.5mA 16 Ω @ 8.5 mA, 600 Ω @ 0.25 mA 100nA 1.91 (Dia.) x 4.56mm -
RS Stock No. 774-3293
Mfr. Part No.1N5351BG
HK$3.355
Each (In a Pack of 10)
units
Single 14V Through Hole 1 5 W Surmetic 40 Voltage Regulator 5% 2 100mA 75Ω 1µA 3.68 (Dia.) x 8.89mm -
RS Stock No. 100-9507
Mfr. Part No.1N5333BG
HK$1.376
Each (In a Box of 1000)
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. 654-7662
Mfr. Part No.1N5366BRLG
HK$4.672
Each (In a Pack of 5)
units
Single 39V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 30mA 14Ω 500nA 8.89 x 3.68 x 3.68mm -
RS Stock No. 169-0478
Mfr. Part No.UDZSTE-177.5B
BrandROHM
HK$0.432
Each (On a Reel of 3000)
units
Single 7.5V Surface Mount 1 200 mW SOD-323F Voltage Regulator 2% 2 5mA 30Ω 500nA 1.7 x 1.25 x 0.7mm -
RS Stock No. 700-2738
Mfr. Part No.UDZSTE-177.5B
BrandROHM
HK$1.964
Each (In a Pack of 10)
units
Single 7.5V Surface Mount 1 200 mW SOD-323F Voltage Regulator 2% 2 5mA 30Ω 500nA 1.7 x 1.25 x 0.7mm -
RS Stock No. 509-144
Mfr. Part No.BZX79-C68,113
BrandNexperia
HK$0.414
Each (In a Pack of 100)
units
Single 68V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 2mA 240Ω 50nA 4.25 x 1.85 x 1.85mm -
RS Stock No. 184-4859
Mfr. Part No.1N5245B
HK$0.362
Each (In a Pack of 250)
units
Single 15V Through Hole 1 500 mW DO-35 General Purpose 5% 2 8.5mA 16 Ω @ 8.5 mA, 600 Ω @ 0.25 mA 100nA 1.91 (Dia.) x 4.56mm -
RS Stock No. 170-8024
Mfr. Part No.BZX84-C6V8,235
BrandNexperia
HK$0.189
Each (On a Reel of 10000)
units
Single 6.8V Surface Mount 1 250 mW TO-236 Voltage Regulator ±5% 3 10mA - 2µA 3 x 1.4 x 1mm AEC-Q101
RS Stock No. 169-8636
Mfr. Part No.1N4745ATR
HK$0.352
Each (On a Reel of 3000)
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. 687-8256
Mfr. Part No.MMSZ18T1G
HK$1.617
Each (In a Pack of 25)
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 -