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. 544-3503
Mfr. Part No.BZX79-C2V4,113
BrandNexperia
HK$0.987
Each (In a Pack of 20)
units
Single 2.4V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 100Ω 50µA 4.25 x 1.85 x 1.85mm -
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. 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. 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. 544-4499
Mfr. Part No.BZX79-C18,113
BrandNexperia
HK$1.016
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$0.412
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. 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. 509-548
Mfr. Part No.BZX84-C6V8,215
BrandNexperia
HK$0.414
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. 166-1315
Mfr. Part No.BZX84-C6V8,215
BrandNexperia
HK$0.171
Each (On a Reel of 3000)
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. 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. 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. 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. 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. 544-4449
Mfr. Part No.BZX79-C8V2,113
BrandNexperia
HK$1.058
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. 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. 166-1238
Mfr. Part No.BZX79-C68,113
BrandNexperia
HK$0.185
Each (On a Reel of 5000)
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. 788-362
Mfr. Part No.BZV55-C2V4,115
BrandNexperia
HK$1.298
Each (In a Pack of 25)
units
Single 2.4V Surface Mount 1 500 mW MiniMELF Voltage Regulator 5% 2 5mA 100Ω 50µA 3.7 x 1.6 x 1.6mm -
RS Stock No. 178-7147
Mfr. Part No.BZX84-C3V6,215
BrandNexperia
HK$0.162
Each (On a Reel of 3000)
units
Single 3.6V Surface Mount 1 250 mW SOT-23 (TO-236AB) Voltage Regulator 5% 3 5mA 90Ω 5µA 3 x 1.4 x 1mm -
RS Stock No. 509-100
Mfr. Part No.BZX84-C18,215
BrandNexperia
HK$0.435
Each (In a Pack of 200)
units
Single 18V Surface Mount 1 250 mW SOT-23 (TO-236AB) Voltage Regulator 5% 3 5mA 45Ω 50nA 3 x 1.4 x 1mm -
RS Stock No. 544-4528
Mfr. Part No.BZX79-C75,113
BrandNexperia
HK$1.051
Each (In a Pack of 20)
units
Single 75V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 2mA 255Ω 50nA 4.25 x 1.85 x 1.85mm -