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. 123-1405
Mfr. Part No.Z1SMA33 TRTB
$0.188
Each (In a Pack of 100)
units
Single 33V Surface Mount 1 3.25 W DO-214AC (SMA) - ±5% 2 25mA 15Ω 1µA 5.1mm 2.6mm
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 - -
RS Stock No. 163-0836
Mfr. Part No.1N5929BG
$0.157
Each (In a Box of 2000)
units
Single 15V Through Hole 1 3 W DO-41 Voltage Regulator 5% 2 25mA 600Ω 1µA 5.2mm -
RS Stock No. 654-7684
Mfr. Part No.1N5380BRLG
$0.848
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 3.68mm
RS Stock No. 103-5048
Mfr. Part No.1N5380BRLG
$0.216
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 3.68mm
RS Stock No. 145-2316
Mfr. Part No.SMBZ5929B-E3/52
BrandVishay
$0.303
Each (On a Reel of 750)
units
Single 15V Surface Mount 1 3 W DO-214AA (SMB) Voltage Regulator 5% 2 25mA 1µA 4.57mm 3.94mm
RS Stock No. 819-3848
Mfr. Part No.SML4744A-E3/61
BrandVishay
$0.656
Each (In a Pack of 20)
units
Single 15V Surface Mount 1 1 W DO-214AC (SMA) General Purpose 5% 2 17mA 14Ω 5µA 4.5mm 2.79mm
RS Stock No. 124-9924
Mfr. Part No.1N5369BRLG
$0.201
Each (On a Reel of 4000)
units
Single 51V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 25mA 27Ω 500nA 8.89mm 3.68mm
RS Stock No. 818-5001
Mfr. Part No.TZX2V4B-TR
BrandVishay
$0.124
Each (In a Pack of 200)
units
Single 2.5V Through Hole 1 500 mW DO-35 Voltage Regulator 4% 2 5mA 100Ω 5µA 3.9mm -
RS Stock No. 170-9022
Mfr. Part No.BZT585B33T-7
$0.055
Each (On a Reel of 3000)
units
Single 33V Surface Mount 1 350 mW SOD-523 Precision ±2% 2 2mA 325Ω 50nA 1.3mm 0.9mm
RS Stock No. 544-4528
Mfr. Part No.BZX79-C75,113
BrandNexperia
$0.199
Each (In a Pack of 20)
units
Single 75V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 2mA 255Ω 50nA 4.25mm 1.85mm
RS Stock No. 166-0303
Mfr. Part No.BZX79-C7V5,113
BrandNexperia
$0.031
Each (On a Reel of 10000)
units
Single 7.5V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 15Ω 1µA 4.25mm 1.85mm
RS Stock No. 759-8832
Mfr. Part No.BZX85C12
$0.131
Each (In a Pack of 100)
units
Single 12V Through Hole 1 1 W DO-41 Voltage Regulator 5% 2 20mA 500nA 5.2mm -
RS Stock No. 759-8715
Mfr. Part No.BZX79C15
$0.064
Each (In a Pack of 250)
units
Single 15V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 30Ω 50nA 4.56mm -
RS Stock No. 800-8829
Mfr. Part No.1N5929BRLG
$0.55
Each (In a Pack of 50)
units
Single 15V Through Hole 1 3 W Case 59-10 Voltage Regulator 5% 2 25mA 600 Ω, 9 Ω 250nA - -
RS Stock No. 145-5395
Mfr. Part No.BZX79C15
$0.036
Each (In a Bag of 1000)
units
Single 15V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 30Ω 50nA 4.56mm -
RS Stock No. 123-1404
Mfr. Part No.Z1SMA18 TRTB
$0.228
Each (In a Pack of 100)
units
Single 18V Surface Mount 1 3.25 W DO-214AC (SMA) - ±5% 2 25mA 15Ω 1µA 5.1mm 2.6mm
RS Stock No. 805-0034
Mfr. Part No.1N4728ATR
$0.122
Each (In a Pack of 100)
units
Single 3.3V Through Hole 1 1 W DO-41 General Purpose 5% 2 76mA 10Ω 100µA 5.2mm -
RS Stock No. 812-8544
Mfr. Part No.BZX55B33-TR
BrandVishay
$0.121
Each (In a Pack of 250)
units
Single 33V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 80Ω 2µA 3.9mm -
RS Stock No. 509-100
Mfr. Part No.BZX84-C18,215
BrandNexperia
$0.07
Each (In a Pack of 200)
units
Single 18V Surface Mount 1 250 mW SOT-23 (TO-236AB) Voltage Regulator 5% 3 5mA 45Ω 50nA 3mm 1.4mm
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