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 Width
RS Stock No. 811-6009
Mfr. Part No.1N5245B-TR
BrandVishay
HK$0.493
Each (In a Pack of 250)
units
Single 15V Through Hole 1 500 mW DO-35 General Purpose 5% 2 8.5mA 16Ω 100nA 3.9mm -
RS Stock No. 165-7081
Mfr. Part No.1N5245B-TR
BrandVishay
HK$0.171
Each (On a Reel of 10000)
units
Single 15V Through Hole 1 500 mW DO-35 General Purpose 5% 2 8.5mA 16Ω 100nA 3.9mm -
RS Stock No. 145-2240
Mfr. Part No.BZX85B75-TR
BrandVishay
HK$0.513
Each (On a Reel of 5000)
units
Single 75V Through Hole 1 1.3 W DO-41 General Purpose 2% 2 4mA 135Ω 500nA 4.1mm -
RS Stock No. 812-8733
Mfr. Part No.BZX85B75-TR
BrandVishay
HK$1.13
Each (In a Pack of 200)
units
Single 75V Through Hole 1 1.3 W DO-41 General Purpose 2% 2 4mA 135Ω 500nA 4.1mm -
RS Stock No. 165-2350
Mfr. Part No.SML4740-E3/61
BrandVishay
HK$2.427
Each (On a Reel of 1800)
units
Single 10V Surface Mount 1 1 W SMA - 10% 2 25mA 10µA 4.6mm 2.9mm
RS Stock No. 165-2678
Mfr. Part No.BZX55C6V8-TAP
BrandVishay
HK$0.221
Each (On a Reel of 10000)
units
Single 6.8V Through Hole 1 500 mW DO-35 Voltage Regulator 6% 2 5mA 100nA 3.9mm 1.7mm
RS Stock No. 811-5961
Mfr. Part No.1N5232B-TR
BrandVishay
HK$0.556
Each (In a Pack of 250)
units
Single 5.6V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 11Ω 5µA 3.9mm -
RS Stock No. 634-7030
Mfr. Part No.SML4740-E3/61
BrandVishay
HK$3.458
Each (In a Pack of 5)
units
Single 10V Surface Mount 1 1 W SMA - 10% 2 25mA 10µA 4.6mm 2.9mm
RS Stock No. 165-7078
Mfr. Part No.1N5232B-TR
BrandVishay
HK$0.205
Each (On a Reel of 10000)
units
Single 5.6V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 11Ω 5µA 3.9mm -
RS Stock No. 708-7947
Mfr. Part No.BZX85C6V2-TAP
BrandVishay
HK$1.07
Each (In a Pack of 100)
units
Single 6.2V Through Hole 1 1.3 W DO-41 Voltage Regulator 6% 2 35mA 1µA 4.1mm 2.6mm
RS Stock No. 159-6363
Mfr. Part No.1N5231B-TR
BrandVishay
HK$0.214
Each (On a Reel of 10000)
units
Single 5.1V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 17Ω 5µA 3.9mm -
RS Stock No. 708-7896
Mfr. Part No.BZX55C6V8-TAP
BrandVishay
HK$0.602
Each (In a Pack of 250)
units
Single 6.8V Through Hole 1 500 mW DO-35 Voltage Regulator 6% 2 5mA 100nA 3.9mm 1.7mm
RS Stock No. 145-2005
Mfr. Part No.ZM4728A-GS08
BrandVishay
HK$0.847
Each (On a Reel of 1500)
units
Single 3.3V Surface Mount 1 1 W DO-213AB General Purpose 5% 2 76mA 10Ω 100µA 5.2mm -
RS Stock No. 145-2219
Mfr. Part No.BZX85C6V2-TAP
BrandVishay
HK$0.479
Each (On a Reel of 5000)
units
Single 6.2V Through Hole 1 1.3 W DO-41 Voltage Regulator 6% 2 35mA 1µA 4.1mm 2.6mm
RS Stock No. 811-5967
Mfr. Part No.1N5231B-TR
BrandVishay
HK$0.573
Each (In a Pack of 250)
units
Single 5.1V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 17Ω 5µA 3.9mm -
RS Stock No. 813-3757
Mfr. Part No.ZM4728A-GS08
BrandVishay
HK$2.58
Each (On a Tape of 50)
units
Single 3.3V Surface Mount 1 1 W DO-213AB General Purpose 5% 2 76mA 10Ω 100µA 5.2mm -
RS Stock No. 145-2655
Mfr. Part No.1N5221B-TR
BrandVishay
HK$0.205
Each (On a Reel of 10000)
units
Single 2.4V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 30Ω 100µA 3.9mm -
RS Stock No. 634-1650
Mfr. Part No.SML4738-E3/61
BrandVishay
HK$3.458
Each (In a Pack of 5)
units
Single 8.2V Surface Mount 1 1 W DO-214AC - 10% 2 31mA 4.5Ω 10µA 4.5mm 2.79mm
RS Stock No. 165-6224
Mfr. Part No.SML4749A-E3/61
BrandVishay
HK$1.52
Each (On a Reel of 1800)
units
Single 24V Surface Mount 1 1 W SMA - 10% 2 10.5mA 25Ω 5µA 4.6mm 2.9mm
RS Stock No. 903-0760
Mfr. Part No.BZX84B3V9-E3-08
BrandVishay
HK$0.702
Each (On a Reel of 250)
units
Single 3.9V Surface Mount 1 300 mW SOT-23 General Purpose 2% 3 1 mA, 5 mA 90Ω 3µA 3.1mm 1.43mm