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. 148-5721
Mfr. Part No.KDZVTR3.0B
BrandROHM
SGD0.162
Each (In a Pack of 100)
units
Single 3.4V Surface Mount 1 1 W SOD-123FL Voltage Regulator - 2 40mA - 100µA 2.7mm -
RS Stock No. 774-3366
Mfr. Part No.1N5920BG
SGD0.677
Each (In a Pack of 10)
units
Single 6.2V Through Hole 1 3 W DO-41 Voltage Regulator 5% 2 60.5mA 200Ω 5µA 5.2mm 2.7mm
RS Stock No. 169-7443
Mfr. Part No.BZX84C9V1-7-F
SGD0.023
Each (On a Reel of 3000)
units
Single 9.1V Surface Mount 1 350 mW SOT-23 General Purpose 6% 3 5mA 15Ω 500nA 3mm -
RS Stock No. 781-5402
Mfr. Part No.SZBZX84C5V1ET1G
SGD0.032
Each (In a Pack of 100)
units
Single 5.1V Surface Mount 1 225 mW SOT-23 Voltage Regulator 6% 3 5mA 60Ω 2µA 3.04mm -
RS Stock No. 163-1977
Mfr. Part No.1SMB5948BT3G
SGD0.131
Each (On a Reel of 2500)
units
Single 91V Surface Mount 1 3 W SMB Voltage Regulator 5% 2 4.1mA 200Ω 1µA 4.6mm -
RS Stock No. 169-8653
Mfr. Part No.1N5243BTR
SGD0.022
Each (On a Reel of 5000)
units
Single 13V Through Hole 1 500 mW DO-35 General Purpose 5% 2 9.5mA 13Ω 500nA 4.56mm 1.91mm
RS Stock No. 171-3931
Mfr. Part No.CDZVT2R7.5B
BrandROHM
SGD0.027
Each (On a Reel of 8000)
units
Single 7.28V Surface Mount 1 100 mW SOD-923, VMN2M Voltage Regulator - 2 5mA 30 Ω, 60 Ω 500nA 0.91mm -
RS Stock No. 171-5321
Mfr. Part No.UDZLVTE-1751
BrandROHM
SGD0.037
Each (On a Reel of 3000)
units
Single 48V Surface Mount 1 200 mW SC-90A, SOD-323FL, UMD Voltage Regulator - 2 2mA - 1µA 1.8mm -
RS Stock No. 163-1205
Mfr. Part No.SZBZX84C3V3LT3G
SGD0.028
Each (On a Reel of 10000)
units
Single 3.3V Surface Mount 1 225 mW SOT-23 Voltage Regulator 6% 3 5mA 95Ω 5µA 3.04mm -
RS Stock No. 169-0674
Mfr. Part No.BZT52C3V9-7-F
SGD0.032
Each (On a Reel of 3000)
units
Single 3.9V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 90Ω 3µA 2.85mm -
RS Stock No. 171-3952
Mfr. Part No.PDZVTR24B
BrandROHM
SGD0.112
Each (On a Reel of 3000)
units
Single 24V Surface Mount 1 1 W PMDTM, SOD-128 Voltage Regulator - 2 10mA 16Ω 10µA 3.9mm -
RS Stock No. 180-8242
Mfr. Part No.BZX84C5V1-E3-08
BrandVishay
SGD0.06
Each (On a Reel of 3000)
units
- - - - - - - - - - - - - -
RS Stock No. 145-2666
Mfr. Part No.MMSZ4683-E3-08
BrandVishay
SGD0.039
Each (On a Reel of 3000)
units
Single 3V Surface Mount 1 500 mW SOD-123 General Purpose 5% 2 0.05mA - 800nA 2.85mm -
RS Stock No. 123-1402
Mfr. Part No.Z1SMA10 TRTB
SGD0.231
Each (In a Pack of 50)
units
Single 10V Surface Mount 1 3.25 W DO-214AC (SMA) - ±5% 2 50mA 1µA 5.1mm -
RS Stock No. 170-4001
Mfr. Part No.BZT52C5V6S RR
SGD0.043
Each (On a Reel of 3000)
units
Single 5.6V Surface Mount 1 200 mW SOD-323F General Purpose 5% 2 5mA 40Ω 900nA 1.8mm -
RS Stock No. 133-2911
Mfr. Part No.TDZVTR24
BrandROHM
SGD0.159
Each (In a Pack of 50)
units
Single 24V Surface Mount 1 500 mW SOD-323HE Voltage Regulator - 2 - - 10µA 2.1mm -
RS Stock No. 168-0470
Mfr. Part No.PTZTE2518B
BrandROHM
SGD1.60
Each (On a Reel of 1500)
units
Single 20.3V Surface Mount 1 1 W DO-214AC (SMA), PMDS Voltage Regulator - 2 20mA 12Ω 10µA 4.7mm -
RS Stock No. 145-3401
Mfr. Part No.MM5Z12VT1G
SGD0.041
Each (On a Reel of 3000)
units
Single 12V Surface Mount 1 300 mW SOD-523 Voltage Regulator 5% 2 5mA 25Ω 100nA 1.3mm -
RS Stock No. 146-1978
Mfr. Part No.BZX79C12
SGD0.018
Each (In a Bag of 1000)
units
Single 12V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 25Ω 100nA 4.56mm 1.91mm
RS Stock No. 921-0947
Mfr. Part No.BZT585B6V2T-7
SGD0.087
Each (In a Pack of 100)
units
Single 6.2V Surface Mount 1 350 mW SOD-523 Precision ±2% 2 5mA 150Ω 3µA 1.3mm -
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