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. 544-4449
Mfr. Part No.BZX79-C8V2,113
BrandNexperia
£0.086
Each (In a Pack of 20)
Units
Single 8.2V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 15Ω 700nA 4.25mm -
RS Stock No. 166-1240
Mfr. Part No.BZV85-C10,113
BrandNexperia
£0.033
Each (On a Reel of 5000)
Units
Single 10V Through Hole 1 1.3 W DO-41 Voltage Regulator 5% 2 25mA 200nA 4.8mm -
RS Stock No. 145-3099
Mfr. Part No.MMSZ5222BT1G
£0.023
Each (On a Reel of 3000)
Units
Single 2.5V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 30Ω 100µA 2.69mm -
RS Stock No. 670-8867
Mfr. Part No.BZX85C15
£0.132
Each (In a Pack of 20)
Units
Single 15V Through Hole 1 1 W DO-41 - 5% 2 15mA 15Ω 500nA 5.21mm -
RS Stock No. 169-8526
Mfr. Part No.BZX85C15
£0.034
Each (In a Bag of 1000)
Units
Single 15V Through Hole 1 1 W DO-41 - 5% 2 15mA 15Ω 500nA 5.21mm -
RS Stock No. 177-7446
Mfr. Part No.TZX4V7A-TR
BrandVishay
£0.012
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. 818-5099
Mfr. Part No.TZX5V1B-TR
BrandVishay
£0.054
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. 436-8186
Mfr. Part No.BZX84-C15,215
BrandNexperia
£0.103
Each (In a Pack of 50)
Units
Single 15V Surface Mount 1 250 mW SOT-23 Voltage Regulator 5% 3 5mA 30Ω 50nA 3mm -
RS Stock No. 145-2285
Mfr. Part No.TZX5V1B-TR
BrandVishay
£0.019
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. 178-7145
Mfr. Part No.BZX84-C15,215
BrandNexperia
£0.014
Each (On a Reel of 3000)
Units
Single 15V Surface Mount 1 250 mW SOT-23 Voltage Regulator 5% 3 5mA 30Ω 50nA 3mm -
RS Stock No. 464-031
Mfr. Part No.1N5355BG
£0.247
Each (In a Pack of 10)
Units
Single 18V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 65mA 2.5Ω 500nA 8.89mm -
RS Stock No. 813-3912
Mfr. Part No.ZPY20-TR
BrandVishay
£0.095
Each (In a Pack of 100)
Units
Single 20V Through Hole 1 1.3 W DO-41 General Purpose 5% 2 25mA 12Ω 500nA 5.2mm 2.6mm
RS Stock No. 145-2259
Mfr. Part No.ZPY20-TR
BrandVishay
£0.043
Each (On a Reel of 5000)
Units
Single 20V Through Hole 1 1.3 W DO-41 General Purpose 5% 2 25mA 12Ω 500nA 5.2mm 2.6mm
RS Stock No. 102-2267
Mfr. Part No.1N5355BG
£0.097
Each (In a Box of 1000)
Units
Single 18V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 65mA 2.5Ω 500nA 8.89mm -
RS Stock No. 170-3467
Mfr. Part No.1N5346BG
£0.097
Each (In a Bag of 1000)
Units
Single 9.1V Through Hole 1 5 W Surmetic 40 Voltage Regulator 5% 2 150mA 150Ω 7.5µA 8.89mm 3.68mm
RS Stock No. 654-7577
Mfr. Part No.1N5346BRLG
£0.35
Each (In a Pack of 5)
Units
Single 9.1V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 150mA 7.5µA 8.89mm -
RS Stock No. 774-3284
Mfr. Part No.1N5346BG
£0.247
Each (In a Pack of 10)
Units
Single 9.1V Through Hole 1 5 W Surmetic 40 Voltage Regulator 5% 2 150mA 150Ω 7.5µA 8.89mm 3.68mm
RS Stock No. 508-056
Mfr. Part No.BZX384-C12,115
BrandNexperia
£0.054
Each (In a Pack of 200)
Units
Single 12V Surface Mount 1 300 mW UMD Voltage Regulator 5% 2 5mA 25Ω 100nA 1.8mm -
RS Stock No. 103-3912
Mfr. Part No.1N5335BRLG
£0.093
Each (On a Reel of 4000)
Units
Single 3.9V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 320mA 50µA 8.89mm -
RS Stock No. 166-1330
Mfr. Part No.BZX384-C12,115
BrandNexperia
£0.02
Each (On a Reel of 3000)
Units
Single 12V Surface Mount 1 300 mW UMD Voltage Regulator 5% 2 5mA 25Ω 100nA 1.8mm -
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