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. 103-2969
Mfr. Part No.MMSZ5231BT1G
R 0.542
Each (On a Reel of 3000)
units
Single 5.1V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 17Ω 5µA 2.69mm -
RS stock no. 545-3049
Mfr. Part No.MMSZ5231BT1G
R 2.192
Each (In a Pack of 20)
units
Single 5.1V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 17Ω 5µA 2.69mm -
RS stock no. 792-5417
Mfr. Part No.1SMB5917BT3G
R 4.836
Each (In a Pack of 20)
units
Single 4.7V Surface Mount 1 3 W SMB Voltage Regulator 5% 2 79.8mA 5µA 4.6mm -
RS stock no. 163-1969
Mfr. Part No.1SMB5917BT3G
R 1.349
Each (On a Reel of 2500)
units
Single 4.7V Surface Mount 1 3 W SMB Voltage Regulator 5% 2 79.8mA 5µA 4.6mm -
RS stock no. 178-7581
Mfr. Part No.MMSZ5242BT1G
R 0.542
Each (On a Reel of 3000)
units
Single 12V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 30Ω 1µA 2.69mm -
RS stock no. 102-1393
Mfr. Part No.1N5339BG
R 1.928
Each (In a Box of 1000)
units
Single 5.6V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 220mA 1µA 8.89mm -
RS stock no. 545-3213
Mfr. Part No.MMSZ5252BT1G
R 2.211
Each (In a Pack of 20)
units
Single 24V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5.2mA 33Ω 100nA 2.69mm -
RS stock no. 163-2531
Mfr. Part No.MMSZ5252BT1G
R 0.572
Each (On a Reel of 3000)
units
Single 24V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5.2mA 33Ω 100nA 2.69mm -
RS stock no. 103-3913
Mfr. Part No.1N5339BRLG
R 1.686
Each (On a Reel of 4000)
units
Single 5.6V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 220mA 1µA 8.89mm -
RS stock no. 545-3140
Mfr. Part No.MMSZ5242BT1G
R 2.325
Each (In a Pack of 20)
units
Single 12V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 30Ω 1µA 2.69mm -
RS stock no. 145-3288
Mfr. Part No.MMSZ5230BT1G
R 0.572
Each (On a Reel of 3000)
units
Single 4.7V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 19Ω 5µA 2.69mm -
RS stock no. 463-791
Mfr. Part No.1N5339BG
R 6.506
Each (In a Pack of 10)
units
Single 5.6V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 220mA 1µA 8.89mm -
RS stock no. 545-3033
Mfr. Part No.MMSZ5230BT1G
R 3.177
Each (In a Pack of 20)
units
Single 4.7V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 19Ω 5µA 2.69mm -
RS stock no. 654-7549
Mfr. Part No.1N5339BRLG
R 7.782
Each (In a Pack of 5)
units
Single 5.6V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 220mA 1µA 8.89mm -
RS stock no. 759-8844
Mfr. Part No.BZX85C16
R 1.104
Each (In a Pack of 100)
units
Single 16V Through Hole 1 1 W DO-41 Voltage Regulator 5% 2 15mA 15Ω 500nA 5.2mm 2.72mm
RS stock no. 166-1928
Mfr. Part No.BZX85C16
R 0.563
Each (In a Bag of 1000)
units
Single 16V Through Hole 1 1 W DO-41 Voltage Regulator 5% 2 15mA 15Ω 500nA 5.2mm 2.72mm
RS stock no. 545-3308
Mfr. Part No.1SMB5913BT3G
R 4.333
Each (In a Pack of 25)
units
Single 3.3V Surface Mount 1 550 mW SMB Voltage Regulator 5% 2 113.6mA 10Ω 100µA 4.32mm -
RS stock no. 800-8986
Mfr. Part No.1SMA5941BT3G
R 4.739
Each (On a Tape of 50)
units
Single 47V Surface Mount 1 1.5 W SMA Voltage Regulator 5% 2 8mA 67 Ω, 1000 Ω 500nA 4.57mm -
RS stock no. 805-0047
Mfr. Part No.1N4733ATR
R 1.051
Each (In a Pack of 100)
units
Single 5.1V Through Hole 1 1 W DO-41 General Purpose 5% 2 49mA 10µA 5.2mm 2.72mm
RS stock no. 800-8787
Mfr. Part No.1N5363BRLG
R 4.903
Each (In a Pack of 50)
units
Single 30V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 40mA 8 Ω, 140 Ω 500nA - 3.68mm