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. 805-0202
Mfr. Part No.1N5248BTR
$0.058
Each (In a Pack of 200)
units
Single 18V Through Hole 1 500 mW DO-35 General Purpose 5% 2 7mA 21Ω 100nA 4.56mm 1.91mm
RS Stock No. 102-2267
Mfr. Part No.1N5355BG
$0.224
Each (In a Box of 1000)
units
Single 18V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 65mA 2.5Ω 500nA 8.89mm -
RS Stock No. 169-9126
Mfr. Part No.1N4742A R0
$0.118
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. 169-8526
Mfr. Part No.BZX85C15
$0.059
Each (In a Bag of 1000)
units
Single 15V Through Hole 1 1 W DO-41 - 5% 2 15mA 15Ω 500nA 5.21mm -
RS Stock No. 687-5459
Mfr. Part No.1N4742A R0
$0.364
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. 169-0470
Mfr. Part No.UDZSTE-1722B
BrandROHM
$0.07
Each (On a Reel of 3000)
units
Single 22V Surface Mount 1 200 mW SOD-323F Voltage Regulator 2% 2 5mA 100Ω 100nA 1.7mm -
RS Stock No. 654-7606
Mfr. Part No.1N5351BRLG
$0.618
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. 812-8632
Mfr. Part No.BZX55C4V3-TR
BrandVishay
$0.102
Each (In a Pack of 250)
units
Single 4.3V Through Hole 1 500 mW DO-35 Voltage Regulator 7% 2 5mA 75Ω 20µA 3.9mm 1.7mm
RS Stock No. 145-2662
Mfr. Part No.1N5248B-TR
BrandVishay
$0.036
Each (On a Reel of 10000)
units
Single 18V Through Hole 1 500 mW DO-35 General Purpose 5% 2 7mA 21Ω 100nA 3.9mm 1.7mm
RS Stock No. 163-0834
Mfr. Part No.1N5357BG
$0.218
Each (In a Box of 1000)
units
Single 20V Through Hole 1 5 W Surmetic 40 Voltage Regulator 5% 2 65mA 75Ω 500nA 8.89mm 3.68mm
RS Stock No. 169-8636
Mfr. Part No.1N4745ATR
$0.056
Each (On a Reel of 3000)
units
Single 16V Through Hole 1 1 W DO-41 General Purpose 5% 2 15.5mA 16Ω 5µA 5.2mm 2.72mm
RS Stock No. 170-3417
Mfr. Part No.1N5351BRLG
$0.198
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. 145-2229
Mfr. Part No.BZX55C4V3-TR
BrandVishay
$0.038
Each (On a Reel of 10000)
units
Single 4.3V Through Hole 1 500 mW DO-35 Voltage Regulator 7% 2 5mA 75Ω 20µA 3.9mm 1.7mm
RS Stock No. 146-0634
Mfr. Part No.Z2SMB33 TRTB
$0.141
Each (On a Reel of 3200)
units
Single 33V Surface Mount 1 3 W DO-214AA (SMB) - ±5% 2 25mA 15Ω 1µA 5.1mm -
RS Stock No. 818-5099
Mfr. Part No.TZX5V1B-TR
BrandVishay
$0.117
Each (In a Pack of 200)
units
Single 5V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 100Ω 5µA 3.9mm 1.7mm
RS Stock No. 654-7628
Mfr. Part No.1N5357BRLG
$0.726
Each (In a Pack of 5)
units
Single 20V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 65mA 500nA 8.89mm -
RS Stock No. 145-2285
Mfr. Part No.TZX5V1B-TR
BrandVishay
$0.038
Each (On a Reel of 10000)
units
Single 5V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 100Ω 5µA 3.9mm 1.7mm
RS Stock No. 166-1266
Mfr. Part No.BZX79-B12,113
BrandNexperia
$0.041
Each (On a Reel of 10000)
units
Single 12V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 25Ω 100nA 4.25mm -
RS Stock No. 826-7863
Mfr. Part No.EDZTE6133B
BrandROHM
$0.141
Each (In a Pack of 100)
units
Single 33V Surface Mount 1 150 mW SOD-523 General Purpose - 2 5mA 250Ω 100nA 1.2mm -
RS Stock No. 476-8463
Mfr. Part No.UDZSTE-17 36B
BrandROHM
$0.121
Each (In a Pack of 100)
units
Single 36V Surface Mount 1 200 mW SOD-323F Voltage Regulator 3% 2 5mA 300Ω 100nA 1.7mm -
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