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. 122-0094
Mfr. Part No.1SMA5918BT3G
R 1.442
Each (On a Reel of 5000)
units
Single 5.1V Surface Mount 1 500 mW SMA Voltage Regulator 5% 2 73.5mA 2.5µA 4.32mm -
RS stock no. 484-5699
Mfr. Part No.BZV55-C4V7,115
BrandNexperia
R 2.705
Each (In a Pack of 50)
units
Single 4.7V Surface Mount 1 500 mW MiniMELF Voltage Regulator 5% 2 5mA 80Ω 3µA 3.7mm -
RS stock no. 544-4477
Mfr. Part No.BZX79-C12,113
BrandNexperia
R 1.953
Each (In a Pack of 20)
units
Single 12V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 25Ω 100nA 4.25mm -
RS stock no. 687-8159
Mfr. Part No.1SMA5931BT3G
R 3.66
Each (In a Pack of 10)
units
Single 18V Surface Mount 1 1.5 W SMA Voltage Regulator 5% 2 20.8mA 12Ω 500nA 4.32mm -
RS stock no. 545-3190
Mfr. Part No.MMSZ5248BT1G
R 3.087
Each (In a Pack of 20)
units
Single 18V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 7mA 21Ω 100nA 2.69mm -
RS stock no. 802-1834
Mfr. Part No.MMSZ3V0T1G
R 0.904
Each (On a Tape of 200)
units
Single 3V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 95Ω 10µA 2.84mm -
RS stock no. 145-5186
Mfr. Part No.1SMB5926BT3G
R 1.427
Each (On a Reel of 2500)
units
Single 11V Surface Mount 1 3 W SMB Voltage Regulator 5% 2 34.1mA 5.5 Ω, 550 Ω 1µA 4.6mm -
RS stock no. 103-2972
Mfr. Part No.1SMB5918BT3G
R 1.484
Each (On a Reel of 2500)
units
Single 5.1V Surface Mount 1 3 W SMB Voltage Regulator 5% 2 73.5mA 5µA 4.32mm -
RS stock no. 145-3616
Mfr. Part No.MMSZ3V0T1G
R 0.492
Each (On a Reel of 3000)
units
Single 3V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 95Ω 10µA 2.84mm -
RS stock no. 103-7573
Mfr. Part No.BZX79-C3V3,113
BrandNexperia
R 0.294
Each (On a Reel of 10000)
units
Single 3.3V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 95Ω 5µA 4.25mm -
RS stock no. 687-8146
Mfr. Part No.1SMA5918BT3G
R 3.912
Each (In a Pack of 10)
units
Single 5.1V Surface Mount 1 500 mW SMA Voltage Regulator 5% 2 73.5mA 2.5µA 4.32mm -
RS stock no. 145-3331
Mfr. Part No.BZX84B5V1LT1G
R 0.432
Each (On a Reel of 3000)
units
Single 5.1V Surface Mount 1 300 mW SOT-23 Voltage Regulator 2% 3 5mA 60Ω 2µA 2.9mm -
RS stock no. 918-9519
Mfr. Part No.BZX85C12-TAP
BrandVishay
R 1.031
Each (On a Reel of 5000)
units
Single 12V Through Hole 1 1.3 W DO-41 Voltage Regulator 5% 2 20mA 500nA 4.1mm 2.5mm
RS stock no. 146-0549
Mfr. Part No.BZV49-C3V3
BrandNexperia
R 3.024
Each (On a Reel of 1000)
units
Single 3.3V Surface Mount 1 1 W SOT-89 Voltage Regulator 5% 3 5mA 95Ω 5µA 4.6mm -
RS stock no. 122-2840
Mfr. Part No.1SMB5923B-13
R 1.841
Each (On a Reel of 3000)
units
Single 8.2V Surface Mount 1 3 W SMB General Purpose 5% 2 45.7mA 3.5Ω 5µA 4.57mm -
RS stock no. 178-7066
Mfr. Part No.BZV55-C2V4,115
BrandNexperia
R 0.498
Each (On a Reel of 2500)
units
Single 2.4V Surface Mount 1 500 mW MiniMELF Voltage Regulator 5% 2 5mA 100Ω 50µA 3.7mm -
RS stock no. 169-0786
Mfr. Part No.DDZ20ASF-7
R 0.411
Each (On a Reel of 3000)
units
Single 18.5V Surface Mount 1 500 mW SOD-323F Voltage Regulator 2.5% 2 10mA 50Ω 70nA 1.8mm -
RS stock no. 822-2059
Mfr. Part No.1SMB5923B-13
R 5.187
Each (In a Pack of 50)
units
Single 8.2V Surface Mount 1 3 W SMB General Purpose 5% 2 45.7mA 3.5Ω 5µA 4.57mm -
RS stock no. 136-4871
Mfr. Part No.BZX79-C3V3,133
BrandNexperia
R 0.773
Each (In a Pack of 100)
units
Single 3.3V Through Hole 1 500 mW SOD27 (DO-35) Voltage Regulator ±2 %, ±5 % 2 5mA 600 Ω @ 1 mA - 4.25mm 1.85mm
RS stock no. 816-7873
Mfr. Part No.BZV49-C3V3
BrandNexperia
R 3.087
Each (In a Pack of 10)
units
Single 3.3V Surface Mount 1 1 W SOT-89 Voltage Regulator 5% 3 5mA 95Ω 5µA 4.6mm -