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. 811-5933
Mfr. Part No.1N5221B-TR
BrandVishay
HK$1.24
Each (In a Pack of 50)
units
Single 2.4V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 30Ω 100µA 3.9mm -
RS Stock No. 121-9485
Mfr. Part No.BZX84C6V8-7-F
HK$0.282
Each (On a Reel of 3000)
units
Single 6.8V Surface Mount 1 350 mW SOT-23 Voltage Regulator 6% 3 5mA 80Ω 2µA 3mm 1.4mm
RS Stock No. 179-1175
Mfr. Part No.BZX79-C30,113
BrandNexperia
HK$0.155
Each (On a Reel of 10000)
units
Single 30V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 2mA 80Ω 50nA 4.25mm 1.85mm
RS Stock No. 788-362
Mfr. Part No.BZV55-C2V4,115
BrandNexperia
HK$1.514
Each (In a Pack of 25)
units
Single 2.4V Surface Mount 1 500 mW MiniMELF Voltage Regulator 5% 2 5mA 100Ω 50µA 3.7mm 1.6mm
RS Stock No. 805-0072
Mfr. Part No.1N4744ATR
HK$0.608
Each (In a Pack of 100)
units
Single 15V Through Hole 1 1 W DO-41 General Purpose 5% 2 17mA 14Ω 5µA 5.2mm -
RS Stock No. 145-4328
Mfr. Part No.BZX79C2V4
HK$0.203
Each (In a Bag of 1000)
units
Single 2.4V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 100Ω 100µA 4.56mm -
RS Stock No. 634-6992
Mfr. Part No.SML4739-E3/61
BrandVishay
HK$2.598
Each (In a Pack of 5)
units
Single 9.1V Surface Mount 1 1 W SMA - 10% 2 28mA 10µA 4.5mm 2.79mm
RS Stock No. 805-0163
Mfr. Part No.1N5241BTR
HK$0.335
Each (In a Pack of 200)
units
Single 11V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 22Ω 2µA 4.56mm -
RS Stock No. 800-8762
Mfr. Part No.1N5350BRLG
HK$2.905
Each (In a Pack of 50)
units
Single 13V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 100mA 2.5 Ω, 100 Ω 1µA - -
RS Stock No. 122-2343
Mfr. Part No.BZX84C3V9-7-F
HK$0.282
Each (On a Reel of 3000)
units
Single 3.9V Surface Mount 1 350 mW SOT-23 General Purpose 5% 3 5mA 90Ω 3µA 3mm 1.4mm
RS Stock No. 738-4995
Mfr. Part No.BZX84C6V8-7-F
HK$0.564
Each (On a Tape of 200)
units
Single 6.8V Surface Mount 1 350 mW SOT-23 Voltage Regulator 6% 3 5mA 80Ω 2µA 3mm 1.4mm
RS Stock No. 751-3856
Mfr. Part No.BZX84C5V1TS-7-F
HK$2.43
Each (On a Tape of 50)
units
Single 5.1V Surface Mount 1 200 mW SOT-363 (SC-88) Voltage Regulator 6% 6 5mA 60Ω 2µA 2.2mm 1.35mm
RS Stock No. 163-0810
Mfr. Part No.SZ1SMA5929BT3G
HK$2.13
Each (On a Reel of 5000)
units
Single 15V Surface Mount 1 500 mW SMA Voltage Regulator 5% 2 25mA 500nA 4.57mm 2.92mm
RS Stock No. 463-577
Mfr. Part No.1N5350BG
HK$2.905
Each (In a Pack of 10)
units
Single 13V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 100mA 2.5Ω 1µA 8.89mm 3.68mm
RS Stock No. 751-5032
Mfr. Part No.SMAZ18-13-F
HK$2.40
Each (In a Pack of 50)
units
Single 18V Surface Mount 1 1 W SMA Voltage Regulator 5% 2 25mA 15Ω 500nA 4.6mm 2.92mm
RS Stock No. 177-7360
Mfr. Part No.BZX85C68-TR
BrandVishay
HK$0.479
Each (On a Reel of 5000)
units
Single 68V Through Hole 1 1.3 W DO-41 General Purpose 6% 2 4mA 130Ω 500nA 4.1mm -
RS Stock No. 170-3480
Mfr. Part No.BZX84C15LT3G
HK$0.154
Each (On a Reel of 10000)
units
Single 15V Surface Mount 1 225 mW SOT-23 Voltage Regulator 5% 3 5mA 30Ω 50nA 3.04mm 1.4mm
RS Stock No. 168-3398
Mfr. Part No.DZ2J100M0L
BrandPanasonic
HK$0.259
Each (On a Reel of 3000)
units
Single 10V Surface Mount 1 200 mW SMini2 F5 B General Purpose 2.5% 2 5mA 60Ω 50nA 1.7mm 1.25mm
RS Stock No. 166-0468
Mfr. Part No.BZX84C5V1TS-7-F
HK$0.736
Each (On a Reel of 3000)
units
Single 5.1V Surface Mount 1 200 mW SOT-363 (SC-88) Voltage Regulator 6% 6 5mA 60Ω 2µA 2.2mm 1.35mm
RS Stock No. 703-3612
Mfr. Part No.DZ2J100M0L
BrandPanasonic
HK$1.127
Each (In a Pack of 50)
units
Single 10V Surface Mount 1 200 mW SMini2 F5 B General Purpose 2.5% 2 5mA 60Ω 50nA 1.7mm 1.25mm
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