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. 163-2519
Mfr. Part No.MMSZ4696T1G
R 0.549
Each (On a Reel of 3000)
units
Single 9.1V Surface Mount 1 500 mW SOD-123 Voltage Regulator 3% 2 0.05mA - 1µA 2.69mm -
RS stock no. 184-4786
Mfr. Part No.1N5234B
R 0.711
Each (In a Pack of 250)
units
Single 6.2V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 7 Ω @ 20 mA, 1000 Ω @ 0.25 mA 5µA - 1.91mm
RS stock no. 687-8161
Mfr. Part No.1SMB5934BT3G
R 4.777
Each (In a Pack of 10)
units
Single 24V Surface Mount 1 3 W SMB Voltage Regulator 5% 2 15.6mA 19Ω 1µA 4.32mm -
RS stock no. 163-2529
Mfr. Part No.MMSZ5243BT1G
R 0.58
Each (On a Reel of 3000)
units
Single 13V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 9.5mA 13Ω 500nA 2.69mm -
RS stock no. 708-7940
Mfr. Part No.BZX85C6V8-TAP
BrandVishay
R 2.054
Each (In a Pack of 100)
units
Single 6.8V Through Hole 1 1.3 W DO-41 Voltage Regulator 6% 2 35mA 3.5Ω 1µA 4.1mm -
RS stock no. 169-6125
Mfr. Part No.BZX85C6V8-TAP
BrandVishay
R 0.587
Each (On a Tape of 25000)
units
Single 6.8V Through Hole 1 1.3 W DO-41 Voltage Regulator 6% 2 35mA 3.5Ω 1µA 4.1mm -
RS stock no. 184-4133
Mfr. Part No.1N5234B
R 0.422
Each (In a Bag of 5000)
units
Single 6.2V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 7 Ω @ 20 mA, 1000 Ω @ 0.25 mA 5µA - 1.91mm
RS stock no. 177-7361
Mfr. Part No.BZX85C6V8-TR
BrandVishay
R 0.866
Each (On a Reel of 5000)
units
Single 6.8V Through Hole 1 1.3 W DO-41 General Purpose 6% 2 35mA 3.5Ω 1µA 4.1mm 2.6mm
RS stock no. 163-1957
Mfr. Part No.1SMA5933BT3G
R 1.449
Each (On a Reel of 5000)
units
Single 22V Surface Mount 1 1.5 W SMA Voltage Regulator 5% 2 17mA 17.5 Ω, 650 Ω 500nA 4.57mm -
RS stock no. 625-6568
Mfr. Part No.1N5349BRLG
R 4.546
Each (In a Pack of 10)
units
Single 12V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 100mA 2.5Ω 2µA 8.89mm -
RS stock no. 687-8275
Mfr. Part No.MMSZ4696T1G
R 3.054
Each (In a Pack of 25)
units
Single 9.1V Surface Mount 1 500 mW SOD-123 Voltage Regulator 3% 2 0.05mA - 1µA 2.69mm -
RS stock no. 177-7446
Mfr. Part No.TZX4V7A-TR
BrandVishay
R 0.276
Each (On a Reel of 10000)
units
Single 4.5V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 100Ω 5µA 3.9mm 1.7mm
RS stock no. 687-5465
Mfr. Part No.1N4747A R0
R 1.993
Each (In a Pack of 50)
units
Single 20V Through Hole 1 1 W DO-41 Voltage Regulator 5% 2 12.5mA 22Ω 5µA 5.2mm -
RS stock no. 103-7555
Mfr. Part No.BZV55-C4V7,115
BrandNexperia
R 0.493
Each (On a Reel of 2500)
units
Single 4.7V Surface Mount 1 500 mW MiniMELF Voltage Regulator 5% 2 5mA 80Ω 3µA 3.7mm -
RS stock no. 163-2344
Mfr. Part No.1SMA5931BT3G
R 1.48
Each (On a Reel of 5000)
units
Single 18V Surface Mount 1 1.5 W SMA Voltage Regulator 5% 2 20.8mA 12Ω 500nA 4.32mm -
RS stock no. 484-5661
Mfr. Part No.BZV55-C33,115
BrandNexperia
R 2.705
Each (In a Pack of 50)
units
Single 33V Surface Mount 1 500 mW MiniMELF Voltage Regulator 5% 2 2mA 80Ω 50nA 3.7mm -
RS stock no. 103-3902
Mfr. Part No.1N5337BG
R 2.373
Each (In a Box of 1000)
units
Single 4.7V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 260mA 5µA 8.89mm -
RS stock no. 792-5307
Mfr. Part No.1N5337BRLG
R 3.489
Each (In a Pack of 20)
units
Single 4.7V Through Hole 1 5 W - Voltage Regulator 5% 2 260mA 5µA 8.89mm 3.68mm
RS stock no. 822-2059
Mfr. Part No.1SMB5923B-13
R 5.187
Each (In a Pack of 50)
units
Single 8.2V Surface Mount 1 3 W SMB General Purpose 5% 2 45.7mA 3.5Ω 5µA 4.57mm -
RS stock no. 122-0094
Mfr. Part No.1SMA5918BT3G
R 1.442
Each (On a Reel of 5000)
units
Single 5.1V Surface Mount 1 500 mW SMA Voltage Regulator 5% 2 73.5mA 2.5µA 4.32mm -