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. 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 -
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. 145-2285
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. 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. 818-5308
Mfr. Part No.TZM5242B-GS08
BrandVishay
$0.087
Each (In a Pack of 250)
units
Single 12V Surface Mount 1 500 mW SOD-80 Voltage Regulator 5% 2 20mA 30Ω 1µA 3.7mm -
RS Stock No. 508-163
Mfr. Part No.BZX79-B12,113
BrandNexperia
$0.102
Each (In a Pack of 100)
units
Single 12V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 25Ω 100nA 4.25mm -
RS Stock No. 165-6068
Mfr. Part No.TZM5242B-GS08
BrandVishay
$0.04
Each (On a Reel of 2500)
units
Single 12V Surface Mount 1 500 mW SOD-80 Voltage Regulator 5% 2 20mA 30Ω 1µA 3.7mm -
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. 103-5131
Mfr. Part No.1N5351BG
$0.222
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 3.68mm
RS Stock No. 774-3293
Mfr. Part No.1N5351BG
$0.54
Each (In a Pack of 10)
units
Single 14V Through Hole 1 5 W Surmetic 40 Voltage Regulator 5% 2 100mA 75Ω 1µA 8.89mm 3.68mm
RS Stock No. 124-9922
Mfr. Part No.1N5357BRLG
$0.194
Each (On a Reel of 4000)
units
Single 20V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 65mA 500nA 8.89mm -
RS Stock No. 165-2351
Mfr. Part No.SML4743-E3/61
BrandVishay
$0.354
Each (On a Reel of 1800)
units
Single 13V Surface Mount 1 1 W SMA - 10% 2 19mA 10Ω 5µA 4.5mm -
RS Stock No. 184-4726
Mfr. Part No.1N4747A
$0.139
Each (In a Pack of 100)
units
Single 20V Through Hole 1 1 W DO-41 General Purpose 5% 2 12.5mA 22Ω 5µA - 2.72mm
RS Stock No. 103-5048
Mfr. Part No.1N5380BRLG
$0.219
Each (On a Reel of 4000)
units
Single 120V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 10mA 170Ω 500nA 8.89mm -
RS Stock No. 687-8165
Mfr. Part No.1SMB5956BT3G
$0.424
Each (In a Pack of 10)
units
Single 200V Surface Mount 1 550 mW SMB Voltage Regulator 5% 2 1.9mA 1200Ω 1µA 4.32mm -
RS Stock No. 184-4137
Mfr. Part No.1N5245B
$0.039
Each (In a Bag of 5000)
units
Single 15V Through Hole 1 500 mW DO-35 General Purpose 5% 2 8.5mA 16 Ω @ 8.5 mA, 600 Ω @ 0.25 mA 100nA - 1.91mm
RS Stock No. 654-7684
Mfr. Part No.1N5380BRLG
$0.662
Each (In a Pack of 5)
units
Single 120V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 10mA 170Ω 500nA 8.89mm -
RS Stock No. 811-6002
Mfr. Part No.1N5242B-TR
BrandVishay
$0.085
Each (In a Pack of 250)
units
Single 12V Through Hole 1 500 mW DO-35 General Purpose 5% 2 20mA 30Ω 1µA 3.9mm 1.7mm
RS Stock No. 816-6789
Mfr. Part No.PLVA653A,215
BrandNexperia
$0.187
Each (In a Pack of 50)
units
Single 5.3V Surface Mount 1 250 mW SOT-23 Avalanche 4% 3 0.25mA - 5µA 3mm -
RS Stock No. 165-5030
Mfr. Part No.Z1SMA18 TRTB
$0.18
Each (On a Reel of 7500)
units
Single 18V Surface Mount 1 3.25 W DO-214AC (SMA) - ±5% 2 25mA 15Ω 1µA 5.1mm -
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