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. 545-3049
Mfr. Part No.MMSZ5231BT1G
R 3.056
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. 103-2969
Mfr. Part No.MMSZ5231BT1G
R 0.531
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. 544-3597
Mfr. Part No.BZX79-C5V1,113
BrandNexperia
R 1.943
Each (In a Pack of 20)
units
Single 5.1V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 60Ω 2µA 4.25mm -
RS stock no. 136-4856
Mfr. Part No.BZX79-C5V1,133
BrandNexperia
R 0.775
Each (In a Pack of 100)
units
Single 5.1V Through Hole 1 500 mW SOD27 (DO-35) Voltage Regulator ±2 %, ±5 % 2 5mA 480 Ω @ 1 mA - 4.25mm 1.85mm
RS stock no. 136-4788
Mfr. Part No.BZX79-C5V1,133
BrandNexperia
R 0.307
Each (On a Tape of 10000)
units
Single 5.1V Through Hole 1 500 mW SOD27 (DO-35) Voltage Regulator ±2 %, ±5 % 2 5mA 480 Ω @ 1 mA - 4.25mm 1.85mm
RS stock no. 103-7574
Mfr. Part No.BZX79-C5V1,113
BrandNexperia
R 0.294
Each (On a Reel of 10000)
units
Single 5.1V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 60Ω 2µA 4.25mm -
RS stock no. 145-2285
Mfr. Part No.TZX5V1B-TR
BrandVishay
R 0.419
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 1.24
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. 792-5417
Mfr. Part No.1SMB5917BT3G
R 4.772
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. 738-5046
Mfr. Part No.MMSZ5231B-7-F
R 0.534
Each (In a Pack of 100)
units
Single 5.1V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 17Ω 5µA 2.85mm -
RS stock no. 122-0299
Mfr. Part No.MMSZ5231B-7-F
R 0.514
Each (On a Reel of 3000)
units
Single 5.1V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 17Ω 5µA 2.85mm -
RS stock no. 163-1969
Mfr. Part No.1SMB5917BT3G
R 1.464
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. 121-9476
Mfr. Part No.BZT52C12-7-F
R 0.493
Each (On a Reel of 3000)
units
Single 12V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 150Ω 100nA 2.85mm -
RS stock no. 751-3679
Mfr. Part No.BZT52C12-13-F
R 0.822
Each (In a Pack of 250)
units
Single 12V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 25Ω 100nA 2.85mm -
RS stock no. 738-4945
Mfr. Part No.BZT52C12-7-F
R 0.91
Each (On a Tape of 200)
units
Single 12V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 150Ω 100nA 2.85mm -
RS stock no. 122-0898
Mfr. Part No.BZT52C12-13-F
R 0.418
Each (On a Reel of 10000)
units
Single 12V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 25Ω 100nA 2.85mm -
RS stock no. 166-1453
Mfr. Part No.BZV55-B5V1,115
BrandNexperia
R 0.945
Each (On a Reel of 7500)
units
Single 5.1V Surface Mount 1 500 mW MiniMELF Voltage Regulator 2% 2 5mA 60Ω 2µA 3.7mm -
RS stock no. 508-674
Mfr. Part No.BZV55-B5V1,115
BrandNexperia
R 1.609
Each (In a Pack of 100)
units
Single 5.1V Surface Mount 1 500 mW MiniMELF Voltage Regulator 2% 2 5mA 60Ω 2µA 3.7mm -
RS stock no. 822-2056
Mfr. Part No.1SMB5921B-13
R 3.424
Each (In a Pack of 50)
units
Single 6.8V Surface Mount 1 3 W SMB General Purpose 5% 2 55.1mA 2.5Ω 5µA 4.57mm -
RS stock no. 708-7912
Mfr. Part No.BZX85C2V7-TAP
BrandVishay
R 1.995
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 -