Zener Diodes

A Zener diode is a type of semiconductor diode that is different to a normal diode as it allows current to flow from its anode to its cathode in either a forward or reverse direction, but only when exposed to enough voltage. Zener diodes have been designed to work reliably in the breakdown region, unlike normal diodes which would overheat. They are the most common and the handiest solutions to a number of needs in a circuit design.

Zener diodes are designed to change the direction of 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 that change a direction of flow is called Zener Voltage or Breakdown Voltage. It could be defined for specific diodes anywhere from 1.8 to 200 V.

Key attributes of a Zener diode are:

• Device configuration including a dual or common anode
• Type of Zener, including avalanche or voltage regulator
• Voltage tolerance
• Voltage drift with temperature
• Impedance (max)

What is a typical application 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.

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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 Length Diameter
RS Stock No. 165-9757
Mfr. Part No.1SMB5924B-13
HK$0.967
Each (On a Reel of 3000)
units
Single 9.1V Surface Mount 1 3 W SMB Voltage Regulator 5% 2 41.2mA 500Ω 5µA 4.57mm -
RS Stock No. 770-3377
Mfr. Part No.1SMB5924B-13
HK$2.084
Each (In a Pack of 25)
units
Single 9.1V Surface Mount 1 3 W SMB Voltage Regulator 5% 2 41.2mA 500Ω 5µA 4.57mm -
RS Stock No. 169-0793
Mfr. Part No.DDZ9V1ASF-7
HK$0.149
Each (On a Reel of 3000)
units
Single 9.1V Surface Mount 1 500 mW SOD-323F Voltage Regulator 2.5% 2 20mA 30Ω 7.5µA 1.8mm -
RS Stock No. 122-0264
Mfr. Part No.MMSZ5227B-7-F
HK$0.217
Each (On a Reel of 3000)
units
Single 3.6V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 24Ω 15µA 2.85mm -
RS Stock No. 751-4562
Mfr. Part No.MMSZ5227B-7-F
HK$0.509
Each (On a Tape of 250)
units
Single 3.6V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 24Ω 15µA 2.85mm -
RS Stock No. 770-5096
Mfr. Part No.DDZ9V1ASF-7
HK$0.406
Each (In a Pack of 100)
units
Single 9.1V Surface Mount 1 500 mW SOD-323F Voltage Regulator 2.5% 2 20mA 30Ω 7.5µA 1.8mm -
RS Stock No. 751-3711
Mfr. Part No.BZT52C2V0-7-F
HK$0.316
Each (On a Tape of 250)
units
Single 2V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 100Ω 150µA 2.85mm -
RS Stock No. 121-9532
Mfr. Part No.BZT52C2V0-7-F
HK$0.21
Each (On a Reel of 3000)
units
Single 2V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 100Ω 150µA 2.85mm -
RS Stock No. 751-3856
Mfr. Part No.BZX84C5V1TS-7-F
HK$2.041
Each (On a Tape of 50)
units
Single 5.1V Surface Mount 1 200 mW SOT-363 (SC-88) Voltage Regulator 6% 6 5mA 60Ω 2µA 2.2mm -
RS Stock No. 122-2343
Mfr. Part No.BZX84C3V9-7-F
HK$0.184
Each (On a Reel of 3000)
units
Single 3.9V Surface Mount 1 350 mW SOT-23 General Purpose 5% 3 5mA 90Ω 3µA 3mm -
RS Stock No. 169-0776
Mfr. Part No.DDZ6V8BSF-7
HK$0.135
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 1.8mm -
RS Stock No. 166-0468
Mfr. Part No.BZX84C5V1TS-7-F
HK$0.736
Each (On a Reel of 3000)
units
Single 5.1V Surface Mount 1 200 mW SOT-363 (SC-88) Voltage Regulator 6% 6 5mA 60Ω 2µA 2.2mm -
RS Stock No. 121-9490
Mfr. Part No.MMSZ5232B-7-F
HK$0.202
Each (On a Reel of 3000)
units
Single 5.6V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 11Ω 5µA 2.85mm -
RS Stock No. 770-5014
Mfr. Part No.DDZ6V8BSF-7
HK$0.351
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 1.8mm -
RS Stock No. 738-4995
Mfr. Part No.BZX84C6V8-7-F
HK$0.354
Each (On a Tape of 200)
units
Single 6.8V Surface Mount 1 350 mW SOT-23 Voltage Regulator 6% 3 5mA 80Ω 2µA 3mm -
RS Stock No. 121-9485
Mfr. Part No.BZX84C6V8-7-F
HK$0.209
Each (On a Reel of 3000)
units
Single 6.8V Surface Mount 1 350 mW SOT-23 Voltage Regulator 6% 3 5mA 80Ω 2µA 3mm -
RS Stock No. 822-2188
Mfr. Part No.BZT52C10T-7
HK$0.544
Each (In a Pack of 100)
units
Single 10V Surface Mount 1 300 mW SOD-523 General Purpose 5% 2 5mA 20Ω 200nA 1.3mm -
RS Stock No. 751-3761
Mfr. Part No.BZT52C3V9S-7-F
HK$0.642
Each (On a Tape of 100)
units
Single 3.9V Surface Mount 1 200 mW SOD-323 Voltage Regulator 5% 2 5mA 90Ω 3µA 1.8mm -
RS Stock No. 751-5057
Mfr. Part No.SMAZ5V6-13-F
HK$1.857
Each (In a Pack of 50)
units
Single 5.6V Surface Mount 1 1 W SMA Voltage Regulator 5% 2 100mA 5µA 4.6mm -
RS Stock No. 922-8468
Mfr. Part No.SMAZ18-13-F
HK$0.797
Each (On a Reel of 5000)
units
Single 18V Surface Mount 1 1 W SMA Voltage Regulator 5% 2 25mA 15Ω 500nA 4.6mm -