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. 165-9757
Mfr. Part No.1SMB5924B-13
HK$1.014
Each (On a Reel of 3000)
units
Single 9.1V Surface Mount 1 3 W SMB Voltage Regulator 5% 2 41.2mA 500Ω 5µA 4.57 x 3.94 x 2.3mm -
RS Stock No. 770-3377
Mfr. Part No.1SMB5924B-13
HK$2.804
Each (In a Pack of 25)
units
Single 9.1V Surface Mount 1 3 W SMB Voltage Regulator 5% 2 41.2mA 500Ω 5µA 4.57 x 3.94 x 2.3mm -
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. 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. 121-9532
Mfr. Part No.BZT52C2V0-7-F
HK$0.265
Each (On a Reel of 3000)
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. 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. 751-3761
Mfr. Part No.BZT52C3V9S-7-F
HK$0.781
Each (On a Tape of 100)
units
Single 3.9V Surface Mount 1 200 mW SOD-323 Voltage Regulator 5% 2 5mA 90Ω 3µA 1.8 x 1.4 x 1.1mm -
RS Stock No. 169-0776
Mfr. Part No.DDZ6V8BSF-7
HK$0.247
Each (On a Reel of 3000)
units
Single 6.7V Surface Mount 1 500 mW SOD-323F Voltage Regulator 2.5% 2 20mA 30Ω 7.5µA 1.8 x 1.35 x 0.75mm -
RS Stock No. 751-5057
Mfr. Part No.SMAZ5V6-13-F
HK$2.749
Each (In a Pack of 50)
units
Single 5.6V Surface Mount 1 1 W SMA Voltage Regulator 5% 2 100mA 5µA 4.6 x 2.92 x 2.1mm -
RS Stock No. 122-1230
Mfr. Part No.SMAZ5V6-13-F
HK$0.973
Each (On a Reel of 5000)
units
Single 5.6V Surface Mount 1 1 W SMA Voltage Regulator 5% 2 100mA 5µA 4.6 x 2.92 x 2.1mm -
RS Stock No. 122-2343
Mfr. Part No.BZX84C3V9-7-F
HK$0.203
Each (On a Reel of 3000)
units
Single 3.9V Surface Mount 1 350 mW SOT-23 General Purpose 5% 3 5mA 90Ω 3µA 3 x 1.4 x 1.1mm -
RS Stock No. 823-1558
Mfr. Part No.MMSZ5246B-7-F
HK$0.574
Each (In a Pack of 200)
units
Single 16V Surface Mount 1 500 mW SOD-123 General Purpose 5% 2 7.8mA 17Ω 100nA 2.85 x 1.7 x 1.35mm -
RS Stock No. 770-5014
Mfr. Part No.DDZ6V8BSF-7
HK$0.575
Each (In a Pack of 100)
units
Single 6.7V Surface Mount 1 500 mW SOD-323F Voltage Regulator 2.5% 2 20mA 30Ω 7.5µA 1.8 x 1.35 x 0.75mm -
RS Stock No. 738-4995
Mfr. Part No.BZX84C6V8-7-F
HK$0.485
Each (On a Tape of 200)
units
Single 6.8V Surface Mount 1 350 mW SOT-23 Voltage Regulator 6% 3 5mA 80Ω 2µA 3 x 1.4 x 1.1mm -
RS Stock No. 169-7179
Mfr. Part No.BZX84B3V0-7-F
HK$0.255
Each (On a Reel of 3000)
units
Single 3V Surface Mount 1 350 mW SOT-23 Voltage Regulator 2% 3 5mA 95Ω 10µA 3 x 1.4 x 1.1mm -
RS Stock No. 166-0424
Mfr. Part No.BZT52C3V9S-7-F
HK$0.369
Each (On a Reel of 3000)
units
Single 3.9V Surface Mount 1 200 mW SOD-323 Voltage Regulator 5% 2 5mA 90Ω 3µA 1.8 x 1.4 x 1.1mm -
RS Stock No. 738-5055
Mfr. Part No.MMSZ5232B-7-F
HK$0.584
Each (On a Tape of 200)
units
Single 5.6V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 11Ω 5µA 2.85 x 1.7 x 1.35mm -
RS Stock No. 122-1229
Mfr. Part No.SMAZ6V2-13-F
HK$0.972
Each (On a Reel of 5000)
units
Single 6.2V Surface Mount 1 1 W SMA Voltage Regulator 5% 2 100mA 5µA 4.6 x 2.92 x 2.1mm -
RS Stock No. 121-9485
Mfr. Part No.BZX84C6V8-7-F
HK$0.207
Each (On a Reel of 3000)
units
Single 6.8V Surface Mount 1 350 mW SOT-23 Voltage Regulator 6% 3 5mA 80Ω 2µA 3 x 1.4 x 1.1mm -
RS Stock No. 922-8468
Mfr. Part No.SMAZ18-13-F
HK$0.952
Each (On a Reel of 5000)
units
Single 18V Surface Mount 1 1 W SMA Voltage Regulator 5% 2 25mA 15Ω 500nA 4.6 x 2.92 x 2.1mm -