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 Dimensions Automotive Standard
RS Stock No. 816-0453
Mfr. Part No.BZX84J-C2V4,115
BrandNexperia
HK$0.714
Each (In a Pack of 150)
units
Single 2V Surface Mount 1 550 mW SOD-323F General Purpose 5% 2 5mA - 50µA 1.8 x 1.35 x 0.8mm -
RS Stock No. 165-2350
Mfr. Part No.SML4740-E3/61
BrandVishay
HK$2.427
Each (On a Reel of 1800)
units
Single 10V Surface Mount 1 1 W SMA - 10% 2 25mA 10µA - -
RS Stock No. 774-3316
Mfr. Part No.1N5374BG
HK$2.879
Each (In a Pack of 10)
units
Single 75V Through Hole 1 5 W Surmetic 40 Voltage Regulator 5% 2 20mA 620Ω 500nA 3.68 (Dia.) x 8.89mm -
RS Stock No. 170-3469
Mfr. Part No.1N5374BG
HK$1.236
Each (In a Bag of 1000)
units
Single 75V Through Hole 1 5 W Surmetic 40 Voltage Regulator 5% 2 20mA 620Ω 500nA 3.68 (Dia.) x 8.89mm -
RS Stock No. 654-7606
Mfr. Part No.1N5351BRLG
HK$3.658
Each (In a Pack of 5)
units
Single 14V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 100mA 2.5Ω 1µA 8.89 x 3.68 x 3.68mm -
RS Stock No. 805-0081
Mfr. Part No.1N4745ATR
HK$0.644
Each (In a Pack of 100)
units
Single 16V Through Hole 1 1 W DO-41 General Purpose 5% 2 15.5mA 16Ω 5µA 2.72 (Dia.) x 5.2mm -
RS Stock No. 811-5967
Mfr. Part No.1N5231B-TR
BrandVishay
HK$0.573
Each (In a Pack of 250)
units
Single 5.1V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 17Ω 5µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 625-6495
Mfr. Part No.1N5374BRLG
HK$4.14
Each (In a Pack of 5)
units
Single 75V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 20mA 45Ω 500nA 8.89 x 3.68 x 3.68mm -
RS Stock No. 163-2332
Mfr. Part No.1N5374BRLG
HK$0.979
Each (On a Reel of 4000)
units
Single 75V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 20mA 45Ω 500nA 8.89 x 3.68 x 3.68mm -
RS Stock No. 687-8256
Mfr. Part No.MMSZ18T1G
HK$1.492
Each (In a Pack of 25)
units
Single 18V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 45Ω 50nA 2.69 x 1.6 x 1.12mm -
RS Stock No. 159-6363
Mfr. Part No.1N5231B-TR
BrandVishay
HK$0.203
Each (On a Reel of 10000)
units
Single 5.1V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 17Ω 5µA 1.7 (Dia.) x 3.9mm -
RS Stock No. 166-1315
Mfr. Part No.BZX84-C6V8,215
BrandNexperia
HK$0.162
Each (On a Reel of 3000)
units
Single 6.8V Surface Mount 1 250 mW SOT-23 (TO-236AB) Voltage Regulator 5% 3 5mA 15Ω 2µA 3 x 1.4 x 1mm -
RS Stock No. 145-2005
Mfr. Part No.ZM4728A-GS08
BrandVishay
HK$0.805
Each (On a Reel of 1500)
units
Single 3.3V Surface Mount 1 1 W DO-213AB General Purpose 5% 2 76mA 10Ω 100µA 5.2 x 2.6mm AEC-Q101
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 - -
RS Stock No. 476-0217
Mfr. Part No.UDZSTE-17 7.5B
BrandROHM
HK$0.926
Each (In a Pack of 100)
units
Single 7.5V Surface Mount 1 200 mW SOD-323F Voltage Regulator 2% 2 5mA 30Ω 500nA 1.7 x 1.25 x 0.7mm -
RS Stock No. 121-9532
Mfr. Part No.BZT52C2V0-7-F
HK$0.257
Each (On a Reel of 3000)
units
Single 2V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 5mA 100Ω 150µA 2.85 x 1.7 x 1.35mm -
RS Stock No. 169-8636
Mfr. Part No.1N4745ATR
HK$0.342
Each (On a Reel of 3000)
units
Single 16V Through Hole 1 1 W DO-41 General Purpose 5% 2 15.5mA 16Ω 5µA 2.72 (Dia.) x 5.2mm -
RS Stock No. 700-2738
Mfr. Part No.UDZSTE-177.5B
BrandROHM
HK$1.926
Each (In a Pack of 10)
units
Single 7.5V Surface Mount 1 200 mW SOD-323F Voltage Regulator 2% 2 5mA 30Ω 500nA 1.7 x 1.25 x 0.7mm -
RS Stock No. 545-3190
Mfr. Part No.MMSZ5248BT1G
HK$1.492
Each (In a Pack of 20)
units
Single 18V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 7mA 21Ω 100nA 2.69 x 1.6 x 1.12mm -
RS Stock No. 805-0189
Mfr. Part No.1N5245BTR
HK$0.274
Each (In a Pack of 200)
units
Single 15V Through Hole 1 500 mW DO-35 General Purpose 5% 2 8.5mA 16Ω 100nA 1.91 (Dia.) x 4.56mm -
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