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. 100-7583
Mfr. Part No.1N5352BG
HK$1.376
Each (In a Box of 1000)
units
Single 15V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 75mA 2.5Ω 1µA 8.89 x 3.68 x 3.68mm -
RS Stock No. 169-8628
Mfr. Part No.1N4728ATR
HK$0.377
Each (On a Reel of 3000)
units
Single 3.3V Through Hole 1 1 W DO-41 General Purpose 5% 2 76mA 10Ω 100µA 2.72 (Dia.) x 5.2mm -
RS Stock No. 463-280
Mfr. Part No.1N5352BG
HK$3.752
Each (In a Pack of 10)
units
Single 15V Through Hole 1 5 W 017AA-01 Voltage Regulator ±5% 2 75mA 2.5Ω 1µA 8.89 x 3.68 x 3.68mm -
RS Stock No. 166-0306
Mfr. Part No.BZX79-C18,113
BrandNexperia
HK$0.132
Each (On a Reel of 10000)
units
Single 18V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 45Ω 50nA 4.25 x 1.85 x 1.85mm -
RS Stock No. 145-5251
Mfr. Part No.SZMMSZ18T1G
HK$0.564
Each (On a Reel of 3000)
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. 654-7527
Mfr. Part No.1N5388BRLG
HK$4.40
Each (In a Pack of 5)
units
Single 200V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 5mA 480Ω 500nA 8.89 x 3.68 x 3.68mm -
RS Stock No. 122-0264
Mfr. Part No.MMSZ5227B-7-F
HK$0.273
Each (On a Reel of 3000)
units
Single 3.6V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 24Ω 15µA 2.85 x 1.7 x 1.35mm -
RS Stock No. 165-8781
Mfr. Part No.PLVA662A,215
BrandNexperia
HK$0.79
Each (On a Reel of 3000)
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. 163-1944
Mfr. Part No.1N5953BRLG
HK$0.749
Each (On a Reel of 6000)
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. 178-4832
Mfr. Part No.1N5388BG
HK$1.205
Each (In a Bag of 1000)
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. 544-4499
Mfr. Part No.BZX79-C18,113
BrandNexperia
HK$1.083
Each (In a Pack of 20)
units
Single 18V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 45Ω 50nA 4.25 x 1.85 x 1.85mm -
RS Stock No. 136-4880
Mfr. Part No.BZX79-C18,133
BrandNexperia
HK$0.422
Each (In a Pack of 100)
units
Single 18V Through Hole 1 500 mW SOD27 (DO-35) Voltage Regulator ±2 %, ±5% 2 5mA 225 Ω @ 1 mA - 1.85 (Dia.) x 4.25mm -
RS Stock No. 186-9414
Mfr. Part No.1N5384BG
HK$3.049
Each (In a Pack of 25)
units
Single 160V Through Hole 1 5 W CASE 017AA Voltage Regulator ±5% 2 8mA 1650Ω 500nA 3.68 (Dia.) x 8.89mm -
RS Stock No. 136-4791
Mfr. Part No.BZX79-C18,133
BrandNexperia
HK$0.149
Each (On a Tape of 10000)
units
Single 18V Through Hole 1 500 mW SOD27 (DO-35) Voltage Regulator ±2 %, ±5% 2 5mA 225 Ω @ 1 mA - 1.85 (Dia.) x 4.25mm -
RS Stock No. 103-3911
Mfr. Part No.1N5388BRLG
HK$1.256
Each (On a Reel of 4000)
units
Single 200V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 5mA 480Ω 500nA 8.89 x 3.68 x 3.68mm -
RS Stock No. 186-8779
Mfr. Part No.1N5384BG
HK$1.205
Each (In a Box of 1000)
units
Single 160V Through Hole 1 5 W CASE 017AA Voltage Regulator ±5% 2 8mA 1650Ω 500nA 3.68 (Dia.) x 8.89mm -
RS Stock No. 751-4562
Mfr. Part No.MMSZ5227B-7-F
HK$0.593
Each (On a Tape of 250)
units
Single 3.6V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 24Ω 15µA 2.85 x 1.7 x 1.35mm -
RS Stock No. 163-1931
Mfr. Part No.1N5384BRLG
HK$1.123
Each (On a Reel of 4000)
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. 145-2240
Mfr. Part No.BZX85B75-TR
BrandVishay
HK$0.575
Each (On a Reel of 5000)
units
Single 75V Through Hole 1 1.3 W DO-41 General Purpose 2% 2 4mA 135Ω 500nA 2.6 (Dia.) x 4.1mm -
RS Stock No. 812-8733
Mfr. Part No.BZX85B75-TR
BrandVishay
HK$1.187
Each (In a Pack of 200)
units
Single 75V Through Hole 1 1.3 W DO-41 General Purpose 2% 2 4mA 135Ω 500nA 2.6 (Dia.) x 4.1mm -