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. 770-5083
Mfr. Part No.DDZ3V0BSF-7
SGD0.071
Each (In a Pack of 100)
units
Single 3.1V Surface Mount 1 500 mW SOD-323F Voltage Regulator 3.5% 2 20mA 120Ω 50µA 1.8mm -
RS Stock No. 867-5368
Mfr. Part No.ZEN132V075A48LS
BrandLittelfuse
SGD1.157
Each (In a Bag of 10)
units
Single 13.4V Surface Mount 1 800 mW - Polymer Protected - 3 3A - 5mA 4.15mm -
RS Stock No. 166-0065
Mfr. Part No.BZX84-C22,215
BrandNexperia
SGD0.021
Each (On a Reel of 3000)
units
Single 22V Surface Mount 1 250 mW SOT-23 Voltage Regulator 5% 3 5mA 55Ω 50nA 3mm -
RS Stock No. 145-5549
Mfr. Part No.BZX85C8V2
SGD0.053
Each (In a Bag of 1000)
units
Single 8.2V Through Hole 1 1 W DO-41 Voltage Regulator 5% 2 25mA 1µA 5.2mm 2.72mm
RS Stock No. 159-6369
Mfr. Part No.1N5251B-TR
BrandVishay
SGD0.033
Each (On a Reel of 10000)
units
Single 22V Through Hole 1 500 mW DO-35 General Purpose 5% 2 5.6mA 29Ω 100nA 3.9mm 1.7mm
RS Stock No. 177-9902
Mfr. Part No.PDZVTR2.0A
BrandROHM
SGD0.112
Each (On a Reel of 3000)
units
Single 2V Surface Mount 1 - SOD-128 Voltage Regulator - 2 40mA - 200µA 2.7mm -
RS Stock No. 151-2634
Mfr. Part No.BZX84J-C12,115
BrandNexperia
SGD0.036
Each (On a Reel of 3000)
units
Single 12V Surface Mount 1 40 (Peak Reverse Power Dissipation) W, 550 (Total Power Dissipation) mW SC-90, SOD-323F General Purpose ±5% 2 5mA - - 1.8mm -
RS Stock No. 922-8462
Mfr. Part No.SMAZ5V1-13-F
SGD0.161
Each (On a Reel of 5000)
units
Single 5.1V Surface Mount 1 1 W SMA Voltage Regulator 5% 2 100mA 2.5µA 4.6mm -
RS Stock No. 169-7458
Mfr. Part No.SMAZ27-13-F
SGD0.166
Each (On a Reel of 5000)
units
Single 27V Surface Mount 1 1 W SMA General Purpose 5% 2 25mA 15Ω 500nA 4.6mm -
RS Stock No. 145-3316
Mfr. Part No.MM5Z2V7T1G
SGD0.041
Each (On a Reel of 3000)
units
Single 2.7V Surface Mount 1 500 mW SOD-523 Voltage Regulator 5% 2 5mA 100Ω 20µA 1.3mm -
RS Stock No. 145-2030
Mfr. Part No.ZPY91-TR
BrandVishay
SGD0.072
Each (On a Reel of 5000)
units
Single 91V Through Hole 1 1.3 W DO-41 General Purpose 5% 2 5mA 250Ω 500nA 5.2mm 2.6mm
RS Stock No. 151-2609
Mfr. Part No.BZX84J-C39,115
BrandNexperia
SGD0.036
Each (On a Reel of 3000)
units
Single 39V Surface Mount 1 40 (Peak Reverse Power Dissipation) W, 550 (Total Power Dissipation) mW SC-90, SOD-323F General Purpose ±5% 2 5mA - - 1.8mm -
RS Stock No. 152-5565
Mfr. Part No.BZX84J-B18,115
BrandNexperia
SGD0.097
Each (In a Pack of 100)
units
Single 18V Surface Mount 1 40 (Peak Reverse Power Dissipation) W, 550 (Total Power Dissipation) mW SC-90, SOD-323F General Purpose ±2% 2 5mA - - 1.8mm -
RS Stock No. 178-7572
Mfr. Part No.1N4746A
SGD0.10
Each (In a Bag of 3000)
units
Single 18V Through Hole 1 1 W DO-41 General Purpose 5% 2 14mA 20Ω 5µA 5.2mm 2.72mm
RS Stock No. 184-1338
Mfr. Part No.MMSZ4687T1G
SGD0.111
Each (In a Pack of 100)
units
Single 4.3V Surface Mount 1 500 mW SOD-123 Voltage Regulator - 2 - - 4µA 2.84mm -
RS Stock No. 151-2622
Mfr. Part No.BZX384-C39,115
BrandNexperia
SGD0.024
Each (On a Reel of 3000)
units
Single 39V Surface Mount 1 40 (Peak Reverse Power Dissipation) W, 300 (Total Power Dissipation) mW SC-76, SOD-323 Voltage Regulator ±5% 2 5mA - - 1.8mm -
RS Stock No. 151-2748
Mfr. Part No.PZU12B2A,115
BrandNexperia
SGD0.068
Each (In a Pack of 250)
units
Single 12V Surface Mount 1 40 (Peak Reverse Power Dissipation) W, 490 (Total Power Dissipation) mW SC-76, SOD-323 General Purpose ±2% 2 5mA - - 1.8mm -
RS Stock No. 170-5427
Mfr. Part No.BZX84-C4V7,235
BrandNexperia
SGD0.04
Each (In a Pack of 250)
units
Single 4.7V Surface Mount 1 250 mW TO-236AB Voltage Regulator ±5% 3 5mA - 3µA 3mm -
RS Stock No. 708-1851
Mfr. Part No.AZ23C6V2-7-F
SGD0.222
Each (In a Pack of 50)
units
Common Anode 6.2V Surface Mount 2 300 mW SOT-23 ESD Suppressor 5% 3 5mA 200Ω 100nA 3mm -
RS Stock No. 146-9470
Mfr. Part No.UFZVTE-1727B
BrandROHM
SGD0.035
Each (On a Reel of 3000)
units
Single 26.56V Surface Mount 1 500 mW SOD-323FL Voltage Regulator - 2 5mA 45 (Dynamic)Ω 200nA 1.8mm -
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