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. 103-3899
Mfr. Part No.1N5373BRLG
$0.17
Each (On a Reel of 4000)
units
Single 68V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 20mA 44Ω 500nA 8.89mm -
RS Stock No. 476-8407
Mfr. Part No.UDZSTE-17 20B
BrandROHM
$0.108
Each (In a Pack of 100)
units
Single 20V Surface Mount 1 200 mW SOD-323F Voltage Regulator 2% 2 5mA 85Ω 100nA 1.7mm -
RS Stock No. 865-2069
Mfr. Part No.1N4742A,113
BrandNexperia
$0.108
Each (In a Pack of 100)
units
Single 12V Through Hole 1 1 W SOD-66 Voltage Regulator 5% 2 21mA - 5µA - 2.6mm
RS Stock No. 169-9126
Mfr. Part No.1N4742A R0
$0.107
Each (On a Tape of 5000)
units
Single 12V Through Hole 1 1 W DO-41 Voltage Regulator 5% 2 21mA 5µA 5.2mm -
RS Stock No. 774-3325
Mfr. Part No.1N5388BG
$0.481
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 3.68mm
RS Stock No. 751-5032
Mfr. Part No.SMAZ18-13-F
$0.332
Each (In a Pack of 50)
units
Single 18V Surface Mount 1 1 W SMA Voltage Regulator 5% 2 25mA 15Ω 500nA 4.6mm -
RS Stock No. 165-8478
Mfr. Part No.1N4742A,113
BrandNexperia
$0.09
Each (On a Reel of 5000)
units
Single 12V Through Hole 1 1 W SOD-66 Voltage Regulator 5% 2 21mA - 5µA - 2.6mm
RS Stock No. 805-0047
Mfr. Part No.1N4733ATR
$0.101
Each (In a Pack of 100)
units
Single 5.1V Through Hole 1 1 W DO-41 General Purpose 5% 2 49mA 10µA 5.2mm 2.72mm
RS Stock No. 509-724
Mfr. Part No.BZX79-C22,113
BrandNexperia
$0.057
Each (In a Pack of 200)
units
Single 22V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 55Ω 50nA 4.25mm -
RS Stock No. 178-4832
Mfr. Part No.1N5388BG
$0.196
Each (In a Bag of 1000)
units
Single 200V Through Hole 1 5 W Surmetic 40 Voltage Regulator 5% 2 5mA 480Ω 500nA 8.89mm 3.68mm
RS Stock No. 103-3911
Mfr. Part No.1N5388BRLG
$0.17
Each (On a Reel of 4000)
units
Single 200V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 5mA 480Ω 500nA 8.89mm -
RS Stock No. 166-1242
Mfr. Part No.BZX79-C22,113
BrandNexperia
$0.028
Each (On a Reel of 5000)
units
Single 22V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 55Ω 50nA 4.25mm -
RS Stock No. 687-5459
Mfr. Part No.1N4742A R0
$0.331
Each (In a Pack of 50)
units
Single 12V Through Hole 1 1 W DO-41 Voltage Regulator 5% 2 21mA 5µA 5.2mm -
RS Stock No. 700-2684
Mfr. Part No.UDZSTE-1720B
BrandROHM
$0.244
Each (In a Pack of 10)
units
Single 20V Surface Mount 1 200 mW SOD-323F Voltage Regulator 2% 2 5mA 85Ω 100nA 1.7mm -
RS Stock No. 103-7547
Mfr. Part No.PLVA650A,215
BrandNexperia
$0.106
Each (On a Reel of 3000)
units
Single 5V Surface Mount 1 250 mW SOT-23 (TO-236AB) Avalanche 4% 3 0.25mA 700Ω 20µA 3mm -
RS Stock No. 781-3995
Mfr. Part No.BZX84C15LT3G
$0.059
Each (On a Tape of 200)
units
Single 15V Surface Mount 1 225 mW SOT-23 Voltage Regulator 5% 3 5mA 30Ω 50nA 3.04mm -
RS Stock No. 710-4294
Mfr. Part No.MMSZ5240B-HE3-08
BrandVishay
$0.082
Each (In a Pack of 100)
units
Single 10V Surface Mount 1 500 mW SOD-123 - 5% 2 20mA 17Ω 3µA 2.85mm -
RS Stock No. 173-0710
Mfr. Part No.Z4KE100A-E3/73
BrandVishay
$0.373
Each (On a Tape of 5500)
units
Single 100V Through Hole 1 1.5 W DO-204AL Voltage Regulator 5% 2 5mA 500Ω 500nA 5.2mm 2.7mm
RS Stock No. 654-7606
Mfr. Part No.1N5351BRLG
$0.562
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. 813-3732
Mfr. Part No.Z4KE100A-E3/54
BrandVishay
$0.491
Each (In a Pack of 20)
units
Single 100V Through Hole 1 1.5 W DO-204AL Voltage Regulator 5% 2 5mA 500Ω 500nA 5.2mm 2.7mm
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