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. 476-0217
Mfr. Part No.UDZSTE-17 7.5B
BrandROHM
HK$0.635
Each (In a Pack of 100)
units
Single 7.5V Surface Mount 1 200 mW SOD-323F Voltage Regulator 2% 2 5mA 30Ω 500nA 1.7mm -
RS Stock No. 169-0478
Mfr. Part No.UDZSTE-177.5B
BrandROHM
HK$0.363
Each (On a Reel of 3000)
units
Single 7.5V Surface Mount 1 200 mW SOD-323F Voltage Regulator 2% 2 5mA 30Ω 500nA 1.7mm -
RS Stock No. 700-2738
Mfr. Part No.UDZSTE-177.5B
BrandROHM
HK$1.277
Each (In a Pack of 10)
units
Single 7.5V Surface Mount 1 200 mW SOD-323F Voltage Regulator 2% 2 5mA 30Ω 500nA 1.7mm -
RS Stock No. 752-5868
Mfr. Part No.KDZTR12B
BrandROHM
HK$3.08
Each (In a Pack of 10)
units
Single 12.5V Surface Mount 1 1 W SOD-123 Voltage Regulator 6% 2 20mA - 10µA 2.6mm -
RS Stock No. 752-5903
Mfr. Part No.KDZTR33B
BrandROHM
HK$2.691
Each (In a Pack of 10)
units
Single 36V Surface Mount 1 1 W SOD-123 Voltage Regulator 6% 2 10mA - 10µA 2.6mm -
RS Stock No. 133-2937
Mfr. Part No.UDZVTE-1722B
BrandROHM
HK$0.351
Each (In a Pack of 200)
units
Single 22V Surface Mount 1 200 mW SOD-323F Voltage Regulator - 2 - 100Ω 100nA 1.8mm -
RS Stock No. 171-4409
Mfr. Part No.PDZVTR3.6B
BrandROHM
HK$0.907
Each (In a Pack of 50)
units
Single 3.6V Surface Mount 1 1 W PMDTM, SOD-128 Voltage Regulator - 2 40mA 15Ω 60µA 3.9mm -
RS Stock No. 171-5332
Mfr. Part No.VDZT2R16B
BrandROHM
HK$0.551
Each (On a Reel of 8000)
units
Single 15.85V Surface Mount 1 100 mW SC-104A, SOD-723, VMD Voltage Regulator - 2 5mA 50 (Dynamic) Ω, 80 (Zener) Ω 100nA 1.05mm -
RS Stock No. 133-3202
Mfr. Part No.KDZVTR16B
BrandROHM
HK$0.961
Each (In a Pack of 50)
units
Single 16V Surface Mount 1 1 W SOD-123FL Voltage Regulator - 2 - - 10µA 2.7mm -
RS Stock No. 133-2942
Mfr. Part No.UDZVTE-1730B
BrandROHM
HK$0.351
Each (In a Pack of 200)
units
Single 30V Surface Mount 1 200 mW SOD-323F Voltage Regulator - 2 - 200Ω 100nA 1.8mm -
RS Stock No. 171-5303
Mfr. Part No.TFZVTR3.0B
BrandROHM
HK$0.381
Each (On a Reel of 3000)
units
Single 3.01V Surface Mount 1 500 mW SC-108B, SOD-323HE, TUMD2M Voltage Regulator - 2 20mA 80Ω 50µA 2.1mm -
RS Stock No. 171-4419
Mfr. Part No.PDZVTR7.5B
BrandROHM
HK$0.907
Each (In a Pack of 50)
units
Single 7.5V Surface Mount 1 1 W PMDTM, SOD-128 Voltage Regulator - 2 40mA 20µA 3.9mm -
RS Stock No. 168-0473
Mfr. Part No.PTZTE2524B
BrandROHM
HK$1.117
Each (On a Reel of 1500)
units
Single 27.6V Surface Mount 1 1 W DO-214AC (SMA), PMDS Voltage Regulator - 2 10mA 16Ω 10µA 4.7mm -
RS Stock No. 171-5510
Mfr. Part No.VDZT2R33B
BrandROHM
HK$0.791
Each (In a Pack of 100)
units
Single 32.15V Surface Mount 1 100 mW SC-104A, SOD-723, VMD Voltage Regulator - 2 2mA 250 (Dynamic) Ω, 250 (Zener) Ω 100nA 1.05mm -
RS Stock No. 178-0402
Mfr. Part No.PDZVTR47A
BrandROHM
HK$0.90
Each (In a Pack of 50)
units
Single 47V Surface Mount 1 - SOD-128 Voltage Regulator - 2 2mA - 10µA 2.7mm -
RS Stock No. 133-2938
Mfr. Part No.UDZVTE-1727B
BrandROHM
HK$0.351
Each (In a Pack of 200)
units
Single 27V Surface Mount 1 200 mW SOD-323F Voltage Regulator - 2 - 150Ω 100nA 1.8mm -
RS Stock No. 146-9390
Mfr. Part No.BZX84C4V3LT116
BrandROHM
HK$0.145
Each (On a Reel of 3000)
units
Single 4.6V Surface Mount 1 250 mW SOT-23 Voltage Regulator ±5% 3 5mA 90Ω 3µA 3.1mm -
RS Stock No. 169-0469
Mfr. Part No.UDZSTE-1727B
BrandROHM
HK$0.363
Each (On a Reel of 3000)
units
Single 27V Surface Mount 1 200 mW SOD-323F Voltage Regulator 2% 2 5mA 150Ω 100nA 1.7mm -
RS Stock No. 177-7838
Mfr. Part No.TDZVTR27
BrandROHM
HK$0.637
Each (On a Reel of 3000)
units
Single 27V Surface Mount 1 500 mW SOD-323HE Voltage Regulator - 2 - - 10µA 2.1mm -
RS Stock No. 476-0122
Mfr. Part No.UDZSTE-17 3.6B
BrandROHM
HK$0.685
Each (In a Pack of 100)
units
Single 3.6V Surface Mount 1 200 mW SOD-323F Voltage Regulator 3% 2 5mA 100Ω 10µA 1.7mm -