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 Width
RS Stock No. 170-2442
Mfr. Part No.UDZSTE-175.6B
BrandROHM
TWD1.50
Each (On a Reel of 3000)
units
Single 5.6V Surface Mount 1 200 mW SOD-323F Voltage Regulator 2% 2 5mA 60Ω 1µA 1.7mm 1.25mm
RS Stock No. 476-0172
Mfr. Part No.UDZSTE-17 5.6B
BrandROHM
TWD1.70
Each (In a Pack of 100)
units
Single 5.6V Surface Mount 1 200 mW SOD-323F Voltage Regulator 2% 2 5mA 60Ω 1µA 1.7mm 1.25mm
RS Stock No. 263-6667
Mfr. Part No.UDZSTE-175.6B
BrandROHM
TWD6.60
Each (In a Pack of 10)
units
Single 5.6V Surface Mount 1 200 mW SOD-323F Voltage Regulator 2% 2 5mA 60Ω 1µA 1.7mm 1.25mm
RS Stock No. 752-5856
Mfr. Part No.KDZTR10B
BrandROHM
TWD5.20
Each (In a Pack of 10)
units
Single 10V Surface Mount 1 1 W SOD-123 Voltage Regulator 6% 2 40mA - 10µA 2.6mm 1.6mm
RS Stock No. 169-0449
Mfr. Part No.PTZTE2510A
BrandROHM
TWD5.10
Each (On a Reel of 1500)
units
Single 10V Surface Mount 1 1 W SOD-106 Voltage Regulator - 2 40mA 10µA 4.5mm 2.6mm
RS Stock No. 700-2570
Mfr. Part No.PTZTE2510A
BrandROHM
TWD22.80
Each (In a Pack of 5)
units
Single 10V Surface Mount 1 1 W SOD-106 Voltage Regulator - 2 40mA 10µA 4.5mm 2.6mm
RS Stock No. 148-5745
Mfr. Part No.KDZLVTR51
BrandROHM
TWD6.00
Each (In a Pack of 100)
units
Single 54V Surface Mount 1 1 W SOD-123FL Voltage Regulator - 2 2mA 220 (Dynamic)Ω 5µA 2.7mm 1.7mm
RS Stock No. 148-5766
Mfr. Part No.BZX84C3V0LT116
BrandROHM
TWD1.90
Each (In a Pack of 250)
units
Single 3.2V Surface Mount 1 250 mW SOT-23 Voltage Regulator ±5% 3 5mA 95Ω 10µA 3.1mm 1.5mm
RS Stock No. 124-6569
Mfr. Part No.EDZVT2R5.6B
BrandROHM
TWD2.70
Each (In a Pack of 200)
units
Single 5.6V Surface Mount 1 150 mW SOD-523 Voltage Regulator - 2 5mA 200Ω 1µA 1.25mm 0.85mm
RS Stock No. 476-8407
Mfr. Part No.UDZSTE-17 20B
BrandROHM
TWD3.10
Each (In a Pack of 100)
units
Single 20V Surface Mount 1 200 mW SOD-323F Voltage Regulator 2% 2 5mA 85Ω 100nA 1.7mm 1.25mm
RS Stock No. 148-6864
Mfr. Part No.EDZVT2R8.2B
BrandROHM
TWD2.40
Each (In a Pack of 250)
units
Single 8.36V Surface Mount 1 150 mW SOD-523 Voltage Regulator - 2 5mA 60Ω 500nA 1.25mm 0.85mm
RS Stock No. 148-6856
Mfr. Part No.UDZVTE-1743
BrandROHM
TWD2.00
Each (In a Pack of 250)
units
Single 45V Surface Mount 1 200 mW SOD-323FL Voltage Regulator - 2 2mA 550 (Dynamic)Ω 100nA 1.8mm 1.35mm
RS Stock No. 168-1468
Mfr. Part No.PTZTE256.2B
BrandROHM
TWD12.50
Each (In a Pack of 50)
units
Single 7V Surface Mount 1 1 W DO-214AC (SMA), PMDS Voltage Regulator - 2 40mA 20µA 4.7mm 2.8mm
RS Stock No. 177-7848
Mfr. Part No.TFZVTR3.3B
BrandROHM
TWD1.90
Each (On a Reel of 3000)
units
Single 3.3V Surface Mount 1 500 mW SOD-323HE Voltage Regulator - 2 - 70 (Dynamic)Ω 20µA 2.1mm 1.5mm
RS Stock No. 178-0417
Mfr. Part No.PDZVTR27A
BrandROHM
TWD10.00
Each (In a Pack of 50)
units
Single 27V Surface Mount 1 - SOD-128 Voltage Regulator - 2 10mA - 10µA 2.7mm 3.9mm
RS Stock No. 171-5301
Mfr. Part No.TFZVTR24B
BrandROHM
TWD2.10
Each (On a Reel of 3000)
units
Single 22.61V Surface Mount 1 500 mW SC-108B, SOD-323HE, TUMD2M Voltage Regulator - 2 5mA 35Ω 200nA 2.1mm 1.5mm
RS Stock No. 171-5583
Mfr. Part No.UDZLVTE-17100
BrandROHM
TWD2.40
Each (In a Pack of 200)
units
Single 94V Surface Mount 1 200 mW SC-90A, SOD-323FL, UMD Voltage Regulator - 2 1mA - 200nA 1.8mm 1.35mm
RS Stock No. 133-2908
Mfr. Part No.TDZVTR20
BrandROHM
TWD10.90
Each (In a Pack of 50)
units
Single 20V Surface Mount 1 500 mW SOD-323HE Voltage Regulator - 2 - - 10µA 2.1mm 1.5mm
RS Stock No. 170-2440
Mfr. Part No.UDZSTE-174.7B
BrandROHM
TWD1.70
Each (On a Reel of 3000)
units
Single 4.7V Surface Mount 1 200 mW SOD-323F Voltage Regulator 2% 2 5mA 100Ω 2µA 1.7mm 1.25mm
RS Stock No. 476-8413
Mfr. Part No.UDZSTE-17 24B
BrandROHM
TWD2.80
Each (In a Pack of 100)
units
Single 24V Surface Mount 1 200 mW SOD-323F Voltage Regulator 2% 2 5mA 120Ω 100nA 1.7mm 1.25mm