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. 788-520
Mfr. Part No.BZV55-C13,115
BrandNexperia
HK$0.766
Each (In a Pack of 25)
units
Single 13V Surface Mount 1 500 mW MiniMELF Voltage Regulator 5% 2 5mA 30Ω 100nA 3.7mm -
RS Stock No. 759-8894
Mfr. Part No.BZX85C6V8
HK$0.54
Each (In a Pack of 250)
units
Single 6.8V Through Hole 1 1 W DO-41 Voltage Regulator 5% 2 35mA 3.5Ω 1µA 5.2mm 2.72mm
RS Stock No. 710-4392
Mfr. Part No.TZMC33-GS08
BrandVishay
HK$0.474
Each (In a Pack of 250)
units
Single 33V Surface Mount 1 500 mW MiniMELF Voltage Regulator 5% 2 5mA 80Ω 100nA 3.7mm -
RS Stock No. 710-4099
Mfr. Part No.BZD27C5V1P-E3-08
BrandVishay
HK$3.243
Each (In a Pack of 25)
units
Single 5.1V Surface Mount 1 800 mW DO-219AB - 6% 2 100mA 5µA 2.9mm -
RS Stock No. 699-7887
Mfr. Part No.TZMB5V1-GS08
BrandVishay
HK$0.525
Each (In a Pack of 100)
units
Single 5.1V Surface Mount 1 500 mW MiniMELF Voltage Regulator 2% 2 5mA 550Ω 2µA 3.7mm 1.6mm
RS Stock No. 177-7893
Mfr. Part No.KDZVTR27B
BrandROHM
HK$0.72
Each (On a Reel of 3000)
units
Single 27V Surface Mount 1 1 W SOD-123FL Voltage Regulator - 2 - - 10µA 2.7mm -
RS Stock No. 165-6080
Mfr. Part No.TZQ5226B-GS18
BrandVishay
HK$0.188
Each (On a Reel of 10000)
units
Single 3.3V Surface Mount 1 500 mW SOD-80 Voltage Regulator 5% 2 20mA 28Ω 25µA 3.7mm -
RS Stock No. 545-2989
Mfr. Part No.MMSZ5226BT1G
HK$1.218
Each (In a Pack of 20)
units
Single 3.3V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 28Ω 25µA 2.69mm -
RS Stock No. 148-5766
Mfr. Part No.BZX84C3V0LT116
BrandROHM
HK$0.194
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 -
RS Stock No. 178-7063
Mfr. Part No.BZV55-C16,115
BrandNexperia
HK$0.179
Each (On a Reel of 2500)
units
Single 16V Surface Mount 1 500 mW MiniMELF Voltage Regulator 5% 2 5mA 40Ω 50nA 3.7mm -
RS Stock No. 802-4681
Mfr. Part No.MM5Z2V4T1G
HK$0.463
Each (In a Pack of 200)
units
Single 2.4V Surface Mount 1 500 mW SOD-523 Voltage Regulator - 2 5mA 100Ω 50µA 1.3mm -
RS Stock No. 163-2535
Mfr. Part No.MMSZ5V6T1G
HK$0.249
Each (On a Reel of 3000)
units
Single 5.6V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 40Ω 1µA 2.69mm -
RS Stock No. 790-4533
Mfr. Part No.BZX84B36-7-F
HK$0.39
Each (In a Pack of 100)
units
Single 36V Surface Mount 1 350 mW SOT-23 Voltage Regulator 2% 3 2mA 90Ω 100nA 3mm -
RS Stock No. 184-1015
Mfr. Part No.MMSZ5237BT1G
HK$0.307
Each (On a Reel of 3000)
units
Single 8.2V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 8 Ω @ 20 mA, 200 Ω @ 0.25 mA 3µA 2.84mm -
RS Stock No. 177-9898
Mfr. Part No.PDZVTR13A
BrandROHM
HK$0.605
Each (On a Reel of 3000)
units
Single 13V Surface Mount 1 - SOD-128 Voltage Regulator - 2 20mA - 10µA 2.7mm -
RS Stock No. 177-9924
Mfr. Part No.PDZVTR9.1A
BrandROHM
HK$0.605
Each (On a Reel of 3000)
units
Single 9.1V Surface Mount 1 - SOD-128 Voltage Regulator - 2 40mA - 20µA 2.7mm -
RS Stock No. 826-7898
Mfr. Part No.TDZTR12
BrandROHM
HK$1.76
Each (In a Pack of 50)
units
Single 12V Surface Mount 1 500 mW TUMD General Purpose - 2 10mA - 10µA 1.9mm -
RS Stock No. 145-2205
Mfr. Part No.TZMC6V8-GS08
BrandVishay
HK$0.234
Each (On a Reel of 2500)
units
Single 6.8V Surface Mount 1 500 mW MiniMELF Voltage Regulator 5% 2 5mA 150Ω 10µA 3.7mm 1.6mm
RS Stock No. 171-5431
Mfr. Part No.TFZVTR10B
BrandROHM
HK$0.599
Each (In a Pack of 200)
units
Single 9.41V Surface Mount 1 500 mW SC-108B, SOD-323HE, TUMD2M Voltage Regulator - 2 20mA 200nA 2.1mm -
RS Stock No. 885-5555
Mfr. Part No.PD3Z284C5V6-7
HK$1.73
Each (In a Pack of 50)
units
Single 5.6V Surface Mount 1 500 mW PowerDI 323 General Purpose 7% 2 5mA 400Ω 1µA 1.95mm -
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