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. 122-2839
Mfr. Part No.1SMB5921B-13
R 1.841
Each (On a Reel of 3000)
units
Single 6.8V Surface Mount 1 3 W SMB General Purpose 5% 2 55.1mA 2.5Ω 5µA 4.57mm -
RS stock no. 177-7370
Mfr. Part No.BZX85C2V7-TAP
BrandVishay
R 0.938
Each (On a Tape of 5000)
units
Single 2.7V Through Hole 1 1.3 W DO-41 Voltage Regulator 7% 2 80mA 20Ω 150µA 4.1mm -
RS stock no. 463-791
Mfr. Part No.1N5339BG
R 5.67
Each (In a Pack of 10)
units
Single 5.6V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 220mA 1µA 8.89mm -
RS stock no. 751-3819
Mfr. Part No.BZT52C9V1-7-F
R 0.936
Each (On a Tape of 100)
units
Single 9.1V Surface Mount 1 500 mW SOD-123 Voltage Regulator 6% 2 5mA 15Ω 500nA 2.85mm -
RS stock no. 654-7549
Mfr. Part No.1N5339BRLG
R 7.266
Each (In a Pack of 5)
units
Single 5.6V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 220mA 1µA 8.89mm -
RS stock no. 102-1393
Mfr. Part No.1N5339BG
R 2.327
Each (In a Box of 1000)
units
Single 5.6V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 220mA 1µA 8.89mm -
RS stock no. 178-7581
Mfr. Part No.MMSZ5242BT1G
R 0.531
Each (On a Reel of 3000)
units
Single 12V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 30Ω 1µA 2.69mm -
RS stock no. 545-3140
Mfr. Part No.MMSZ5242BT1G
R 3.087
Each (In a Pack of 20)
units
Single 12V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 30Ω 1µA 2.69mm -
RS stock no. 748-5045
Mfr. Part No.BZX55C10 R0
R 2.074
Each (In a Pack of 200)
units
Single 10V Through Hole 1 500 mW DO-35 Voltage Regulator 6% 2 5mA 15Ω 100nA 3.7mm 2.1mm
RS stock no. 751-5032
Mfr. Part No.SMAZ18-13-F
R 2.196
Each (In a Pack of 50)
units
Single 18V Surface Mount 1 1 W SMA Voltage Regulator 5% 2 25mA 15Ω 500nA 4.6mm -
RS stock no. 163-2531
Mfr. Part No.MMSZ5252BT1G
R 0.58
Each (On a Reel of 3000)
units
Single 24V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5.2mA 33Ω 100nA 2.69mm -
RS stock no. 145-3288
Mfr. Part No.MMSZ5230BT1G
R 0.58
Each (On a Reel of 3000)
units
Single 4.7V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 19Ω 5µA 2.69mm -
RS stock no. 545-3033
Mfr. Part No.MMSZ5230BT1G
R 3.087
Each (In a Pack of 20)
units
Single 4.7V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 19Ω 5µA 2.69mm -
RS stock no. 169-9300
Mfr. Part No.BZX55C10 R0
R 0.454
Each (On a Tape of 10000)
units
Single 10V Through Hole 1 500 mW DO-35 Voltage Regulator 6% 2 5mA 15Ω 100nA 3.7mm 2.1mm
RS stock no. 169-0677
Mfr. Part No.BZT52C9V1-7-F
R 0.483
Each (On a Reel of 3000)
units
Single 9.1V Surface Mount 1 500 mW SOD-123 Voltage Regulator 6% 2 5mA 15Ω 500nA 2.85mm -
RS stock no. 103-3913
Mfr. Part No.1N5339BRLG
R 2.034
Each (On a Reel of 4000)
units
Single 5.6V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 220mA 1µA 8.89mm -
RS stock no. 545-3213
Mfr. Part No.MMSZ5252BT1G
R 3.087
Each (In a Pack of 20)
units
Single 24V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5.2mA 33Ω 100nA 2.69mm -
RS stock no. 922-8468
Mfr. Part No.SMAZ18-13-F
R 1.566
Each (On a Reel of 5000)
units
Single 18V Surface Mount 1 1 W SMA Voltage Regulator 5% 2 25mA 15Ω 500nA 4.6mm -
RS stock no. 708-7925
Mfr. Part No.BZX85C33-TAP
BrandVishay
R 1.166
Each (In a Pack of 100)
units
Single 33V Through Hole 1 1.3 W DO-41 Voltage Regulator 6% 2 8mA 35Ω 500nA 4.1mm -
RS stock no. 759-8844
Mfr. Part No.BZX85C16
R 1.213
Each (In a Pack of 100)
units
Single 16V Through Hole 1 1 W DO-41 Voltage Regulator 5% 2 15mA 15Ω 500nA 5.2mm 2.72mm