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. 165-8635
Mfr. Part No.BZX384-B12,115
BrandNexperia
R 0.737
Each (On a Reel of 3000)
units
Single 12V Surface Mount 1 300 mW SOD-323 Voltage Regulator 2% 2 - - 100nA 1.8mm -
RS stock no. 186-8787
Mfr. Part No.1SMA5929BT3G
R 1.358
Each (On a Reel of 5000)
units
Single 15V Surface Mount 1 1.5 W SMA (CASE 403D) Voltage Regulator ±5% 2 25mA 9 Ω @ 25 mA, 600 Ω @ 0.25 mA 500nA 4.57mm -
RS stock no. 159-6592
Mfr. Part No.TZX9V1E-TR
BrandVishay
R 0.417
Each (On a Reel of 10000)
units
Single 9.1V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 20Ω 1µA 3.9mm 1.7mm
RS stock no. 544-4499
Mfr. Part No.BZX79-C18,113
BrandNexperia
R 0.431
Each (In a Pack of 20)
units
Single 18V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 45Ω 50nA 4.25mm -
RS stock no. 145-4163
Mfr. Part No.1SMB5941BT3G
R 1.464
Each (On a Reel of 2500)
units
Single 47V Surface Mount 1 3 W SMB Voltage Regulator 5% 2 8mA 67Ω 1µA 4.6mm -
RS stock no. 146-1448
Mfr. Part No.TZX16A-TR
BrandVishay
R 0.285
Each (On a Reel of 10000)
units
Single 16V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 45Ω 1µA 3.9mm 1.7mm
RS stock no. 145-2076
Mfr. Part No.PLZ27B-G3/H
BrandVishay
R 0.456
Each (On a Reel of 4500)
units
Single 25.6V Surface Mount 1 500 mW DO-219AC General Purpose - 2 5mA - 200nA 1.9mm -
RS stock no. 811-6059
Mfr. Part No.1N5266B-TR
BrandVishay
R 1.091
Each (In a Pack of 250)
units
Single 68V Through Hole 1 500 mW DO-35 General Purpose 5% 2 1.8mA 230Ω 100nA 3.9mm 1.7mm
RS stock no. 791-6107
Mfr. Part No.MM3Z5V6ST1G
R 0.197
Each (In a Pack of 200)
units
Single 5.6V Surface Mount 1 200 mW SOD-323 Voltage Regulator 2% 2 5mA 40Ω 1µA 1.8mm -
RS stock no. 813-3808
Mfr. Part No.ZM4747A-GS08
BrandVishay
R 1.065
Each (On a Tape of 50)
units
Single 20V Surface Mount 1 1 W DO-213AB General Purpose 5% 2 12.5mA 22Ω 5µA 5.2mm 2.6mm
RS stock no. 814-2806
Mfr. Part No.BZG03C270TR
BrandVishay
R 2.931
Each (In a Pack of 25)
units
Single 270V Surface Mount 1 3 W DO-214AC (SMA) Voltage Regulator 7% 2 2mA 1000Ω 1µA 4.5mm -
RS stock no. 725-8265
Mfr. Part No.PDZ4.7B,115
BrandNexperia
R 1.037
Each (On a Tape of 100)
units
Single 4.7V Surface Mount 1 400 mW SOD-323 Voltage Regulator 2% 2 5mA 90Ω 2µA 1.8mm -
RS stock no. 122-1222
Mfr. Part No.SMAZ12-13-F
R 1.581
Each (On a Reel of 5000)
units
Single 12V Surface Mount 1 1 W SMA Voltage Regulator 5% 2 50mA 1µA 4.6mm -
RS stock no. 165-2863
Mfr. Part No.BZX84C4V7-E3-08
BrandVishay
R 0.598
Each (On a Reel of 3000)
units
Single 4.7V Surface Mount 1 300 mW SOT-23 - 5% 3 5mA 80Ω 3µA 3.1mm -
RS stock no. 146-0909
Mfr. Part No.BZX585-C9V1
BrandNexperia
R 0.331
Each (On a Reel of 3000)
units
Single 9.1V Surface Mount 1 300 mW SOD-523 Voltage Regulator 5% 2 5mA 10Ω 500nA 1.25mm -
RS stock no. 163-1206
Mfr. Part No.SZBZX84C3V6LT3G
R 0.199
Each (On a Reel of 10000)
units
Single 3.6V Surface Mount 1 225 mW SOT-23 Voltage Regulator 5% 3 5mA 90Ω 5µA 3.04mm -
RS stock no. 818-5112
Mfr. Part No.TZX5V6E-TR
BrandVishay
R 1.16
Each (In a Pack of 200)
units
Single 5.6V Through Hole 1 500 mW DO-35 Voltage Regulator 3% 2 5mA 40Ω 5µA 3.9mm 1.7mm
RS stock no. 165-6006
Mfr. Part No.TZX12B-TR
BrandVishay
R 0.426
Each (On a Reel of 10000)
units
Single 12V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 35Ω 1µA 3.9mm 1.7mm
RS stock no. 182-7385
Mfr. Part No.GDZ4V3LP3-7
R 1.106
Each (In a Pack of 250)
units
- 4.3V Surface Mount 1 250 W X3-DFN0603 Ultra Small ±5% 2 5mA - 5µA 0.62mm -
RS stock no. 805-4563
Mfr. Part No.NZ9F16VST5G
R 0.494
Each (In a Pack of 100)
units
Single 16V Surface Mount 1 250 mW SOD-923 Voltage Regulator 2% 2 5mA 50Ω 100nA 0.85mm -