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. 463-379
Mfr. Part No.1N5333BG
HK$2.767
Each (In a Pack of 10)
units
Single 3.3V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 380mA 300µA 8.89mm -
RS Stock No. 625-6445
Mfr. Part No.1N5333BRLG
HK$3.086
Each (In a Pack of 5)
units
Single 3.3V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 380mA 300µA 8.89mm -
RS Stock No. 165-7078
Mfr. Part No.1N5232B-TR
BrandVishay
HK$0.205
Each (On a Reel of 10000)
units
Single 5.6V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 11Ω 5µA 3.9mm 1.7mm
RS Stock No. 165-2350
Mfr. Part No.SML4740-E3/61
BrandVishay
HK$1.558
Each (On a Reel of 1800)
units
Single 10V Surface Mount 1 1 W SMA - 10% 2 25mA 10µA 4.6mm -
RS Stock No. 654-7606
Mfr. Part No.1N5351BRLG
HK$3.126
Each (In a Pack of 5)
units
Single 14V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 100mA 2.5Ω 1µA 8.89mm -
RS Stock No. 170-8024
Mfr. Part No.BZX84-C6V8,235
BrandNexperia
HK$0.121
Each (On a Reel of 10000)
units
Single 6.8V Surface Mount 1 250 mW TO-236 Voltage Regulator ±5% 3 10mA - 2µA 3mm -
New
RS Stock No. 184-4137
Mfr. Part No.1N5245B
HK$0.19
Each (In a Bag of 5000)
units
Single 15V Through Hole 1 500 mW DO-35 General Purpose 5% 2 8.5mA 16 Ω @ 8.5 mA, 600 Ω @ 0.25 mA 100nA - 1.91mm
RS Stock No. 103-5131
Mfr. Part No.1N5351BG
HK$1.076
Each (In a Box of 1000)
units
Single 14V Through Hole 1 5 W Surmetic 40 Voltage Regulator 5% 2 100mA 75Ω 1µA 8.89mm 3.68mm
RS Stock No. 634-7030
Mfr. Part No.SML4740-E3/61
BrandVishay
HK$3.458
Each (In a Pack of 5)
units
Single 10V Surface Mount 1 1 W SMA - 10% 2 25mA 10µA 4.6mm -
RS Stock No. 159-6363
Mfr. Part No.1N5231B-TR
BrandVishay
HK$0.175
Each (On a Reel of 10000)
units
Single 5.1V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 17Ω 5µA 3.9mm 1.7mm
RS Stock No. 145-4102
Mfr. Part No.MMSZ18T1G
HK$0.243
Each (On a Reel of 3000)
units
Single 18V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 45Ω 50nA 2.69mm -
RS Stock No. 687-8256
Mfr. Part No.MMSZ18T1G
HK$1.035
Each (In a Pack of 25)
units
Single 18V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 45Ω 50nA 2.69mm -
RS Stock No. 654-7662
Mfr. Part No.1N5366BRLG
HK$3.342
Each (In a Pack of 5)
units
Single 39V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 30mA 14Ω 500nA 8.89mm -
New
RS Stock No. 184-4859
Mfr. Part No.1N5245B
HK$0.35
Each (In a Pack of 250)
units
Single 15V Through Hole 1 500 mW DO-35 General Purpose 5% 2 8.5mA 16 Ω @ 8.5 mA, 600 Ω @ 0.25 mA 100nA - 1.91mm
RS Stock No. 751-3711
Mfr. Part No.BZT52C2V0-7-F
HK$0.316
Each (On a Tape of 250)
units
Single 2V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 100Ω 150µA 2.85mm -
RS Stock No. 625-6495
Mfr. Part No.1N5374BRLG
HK$2.516
Each (In a Pack of 5)
units
Single 75V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 20mA 45Ω 500nA 8.89mm -
RS Stock No. 813-3757
Mfr. Part No.ZM4728A-GS08
BrandVishay
HK$1.633
Each (On a Tape of 50)
units
Single 3.3V Surface Mount 1 1 W DO-213AB General Purpose 5% 2 76mA 10Ω 100µA 5.2mm 2.6mm
RS Stock No. 166-0304
Mfr. Part No.BZX79-C8V2,113
BrandNexperia
HK$0.156
Each (On a Reel of 10000)
units
Single 8.2V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 15Ω 700nA 4.25mm -
RS Stock No. 170-3417
Mfr. Part No.1N5351BRLG
HK$1.163
Each (On a Reel of 4000)
units
Single 14V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 100mA 2.5Ω 1µA 8.89mm -
RS Stock No. 774-3316
Mfr. Part No.1N5374BG
HK$3.332
Each (In a Pack of 10)
units
Single 75V Through Hole 1 5 W Surmetic 40 Voltage Regulator 5% 2 20mA 620Ω 500nA 8.89mm 3.68mm
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