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. 145-2285
Mfr. Part No.TZX5V1B-TR
BrandVishay
R 0.375
Each (On a Reel of 10000)
units
Single 5V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 100Ω 5µA 3.9mm 1.7mm
RS stock no. 818-5099
Mfr. Part No.TZX5V1B-TR
BrandVishay
R 1.038
Each (In a Pack of 200)
units
Single 5V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 100Ω 5µA 3.9mm 1.7mm
RS stock no. 708-7912
Mfr. Part No.BZX85C2V7-TAP
BrandVishay
R 0.388
Each (In a Pack of 100)
units
Single 2.7V Through Hole 1 1.3 W DO-41 Voltage Regulator 7% 2 80mA 20Ω 150µA 4.1mm -
RS stock no. 177-7370
Mfr. Part No.BZX85C2V7-TAP
BrandVishay
R 0.365
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. 159-6372
Mfr. Part No.1N5267B-TR
BrandVishay
R 0.277
Each (On a Reel of 10000)
units
Single 75V Through Hole 1 500 mW DO-35 General Purpose 5% 2 1.7mA 270Ω 100nA 3.9mm 1.7mm
RS stock no. 811-6068
Mfr. Part No.1N5267B-TR
BrandVishay
R 0.282
Each (In a Pack of 250)
units
Single 75V Through Hole 1 500 mW DO-35 General Purpose 5% 2 1.7mA 270Ω 100nA 3.9mm 1.7mm
RS stock no. 159-6497
Mfr. Part No.BZX85C33-TAP
BrandVishay
R 0.378
Each (On a Reel of 5000)
units
Single 33V Through Hole 1 1.3 W DO-41 Voltage Regulator 6% 2 8mA 35Ω 500nA 4.1mm -
RS stock no. 699-7758
Mfr. Part No.BZG05C5V6-E3-TR
BrandVishay
R 4.423
Each (In a Pack of 20)
units
Single 5.6V Surface Mount 1 3 W DO-214AC (SMA) Voltage Regulator 7% 2 45mA 400Ω 1µA 4.5mm -
RS stock no. 708-7925
Mfr. Part No.BZX85C33-TAP
BrandVishay
R 0.39
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. 818-5086
Mfr. Part No.TZX4V7A-TR
BrandVishay
R 0.265
Each (In a Pack of 200)
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. 812-8796
Mfr. Part No.BZX85C6V8-TR
BrandVishay
R 0.384
Each (In a Pack of 200)
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. 169-6125
Mfr. Part No.BZX85C6V8-TAP
BrandVishay
R 0.593
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. 177-7361
Mfr. Part No.BZX85C6V8-TR
BrandVishay
R 0.366
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. 708-7940
Mfr. Part No.BZX85C6V8-TAP
BrandVishay
R 1.923
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. 145-2438
Mfr. Part No.BZX85C6V8-TR
BrandVishay
R 0.61
Each (On a Reel of 10000)
units
- - - - - - - - - - - - - -
RS stock no. 177-7446
Mfr. Part No.TZX4V7A-TR
BrandVishay
R 0.257
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. 165-6257
Mfr. Part No.TZX4V7C-TR
BrandVishay
R 0.26
Each (On a Reel of 10000)
units
Single 4.7V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 100Ω 5µA 3.9mm 1.7mm
RS stock no. 918-9519
Mfr. Part No.BZX85C12-TAP
BrandVishay
R 0.744
Each (On a Reel of 5000)
units
Single 12V Through Hole 1 1.3 W DO-41 Voltage Regulator 5% 2 20mA 500nA 4.1mm 2.5mm
RS stock no. 699-7824
Mfr. Part No.BZX85C12-TAP
BrandVishay
R 1.879
Each (In a Pack of 100)
units
Single 12V Through Hole 1 1.3 W DO-41 Voltage Regulator 5% 2 20mA 500nA 4.1mm 2.5mm
RS stock no. 818-5083
Mfr. Part No.TZX4V7C-TR
BrandVishay
R 0.267
Each (In a Pack of 200)
units
Single 4.7V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 100Ω 5µA 3.9mm 1.7mm