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. 774-3325
Mfr. Part No.1N5388BG
HK$3.142
Each (In a Pack of 10)
units
Single 200V Through Hole 1 5 W Surmetic 40 Voltage Regulator 5% 2 5mA 480Ω 500nA 8.89mm -
RS Stock No. 166-0306
Mfr. Part No.BZX79-C18,113
BrandNexperia
HK$0.154
Each (On a Reel of 10000)
units
Single 18V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 45Ω 50nA 4.25mm 1.85mm
RS Stock No. 122-0264
Mfr. Part No.MMSZ5227B-7-F
HK$0.274
Each (On a Reel of 3000)
units
Single 3.6V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 20mA 24Ω 15µA 2.85mm 1.7mm
RS Stock No. 186-9414
Mfr. Part No.1N5384BG
HK$3.05
Each (In a Pack of 25)
units
Single 160V Through Hole 1 5 W CASE 017AA Voltage Regulator ±5% 2 8mA 1650Ω 500nA - -
RS Stock No. 544-4499
Mfr. Part No.BZX79-C18,113
BrandNexperia
HK$1.03
Each (In a Pack of 20)
units
Single 18V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 45Ω 50nA 4.25mm 1.85mm
RS Stock No. 816-6791
Mfr. Part No.PLVA662A,215
BrandNexperia
HK$2.18
Each (In a Pack of 50)
units
Single 6.2V Surface Mount 1 250 mW SOT-23 Avalanche 3% 3 0.25mA - 100nA 3mm 1.4mm
RS Stock No. 800-8869
Mfr. Part No.1N5953BRLG
HK$2.08
Each (In a Pack of 50)
units
Single 150V Through Hole 1 3 W Case 59-10 Voltage Regulator 5% 2 2.5mA 600Ω 250nA - -
RS Stock No. 165-8781
Mfr. Part No.PLVA662A,215
BrandNexperia
HK$0.659
Each (On a Reel of 3000)
units
Single 6.2V Surface Mount 1 250 mW SOT-23 Avalanche 3% 3 0.25mA - 100nA 3mm 1.4mm
RS Stock No. 509-144
Mfr. Part No.BZX79-C68,113
BrandNexperia
HK$0.351
Each (In a Pack of 100)
units
Single 68V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 2mA 240Ω 50nA 4.25mm 1.85mm
RS Stock No. 103-5131
Mfr. Part No.1N5351BG
HK$1.24
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 -
RS Stock No. 708-7947
Mfr. Part No.BZX85C6V2-TAP
BrandVishay
HK$1.07
Each (In a Pack of 100)
units
Single 6.2V Through Hole 1 1.3 W DO-41 Voltage Regulator 6% 2 35mA 1µA 4.1mm 2.6mm
RS Stock No. 654-7662
Mfr. Part No.1N5366BRLG
HK$4.058
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 3.68mm
RS Stock No. 687-8174
Mfr. Part No.BZX84B5V1LT1G
HK$1.28
Each (In a Pack of 25)
units
Single 5.1V Surface Mount 1 300 mW SOT-23 Voltage Regulator 2% 3 5mA 60Ω 2µA 2.9mm 1.3mm
RS Stock No. 774-3316
Mfr. Part No.1N5374BG
HK$3.224
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 -
RS Stock No. 170-3417
Mfr. Part No.1N5351BRLG
HK$1.03
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 3.68mm
RS Stock No. 545-3190
Mfr. Part No.MMSZ5248BT1G
HK$1.62
Each (In a Pack of 20)
units
Single 18V Surface Mount 1 500 mW SOD-123 Voltage Regulator 5% 2 7mA 21Ω 100nA 2.69mm 1.6mm
RS Stock No. 700-2738
Mfr. Part No.UDZSTE-177.5B
BrandROHM
HK$1.63
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 1.25mm
RS Stock No. 816-0453
Mfr. Part No.BZX84J-C2V4,115
BrandNexperia
HK$0.644
Each (In a Pack of 150)
units
Single 2V Surface Mount 1 550 mW SOD-323F General Purpose 5% 2 5mA - 50µA 1.8mm 1.35mm
RS Stock No. 163-2332
Mfr. Part No.1N5374BRLG
HK$1.118
Each (On a Reel of 4000)
units
Single 75V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 20mA 45Ω 500nA 8.89mm 3.68mm
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 4.6mm 2.9mm
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