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. 774-3363
Mfr. Part No.1N5929BG
$0.432
Each (In a Pack of 10)
units
Single 15V Through Hole 1 3 W DO-41 Voltage Regulator 5% 2 25mA 600Ω 1µA 5.2mm 2.7mm
RS Stock No. 814-1437
Mfr. Part No.SMAZ5929B-E3/61
BrandVishay
$0.471
Each (In a Pack of 20)
units
Single 15V Surface Mount 1 500 mW DO-214AC (SMA) Voltage Regulator 5% 2 25mA 1µA 4.5mm -
RS Stock No. 177-7410
Mfr. Part No.BZX55B33-TR
BrandVishay
$0.045
Each (On a Reel of 10000)
units
Single 33V Through Hole 1 500 mW DO-35 Voltage Regulator 2% 2 5mA 80Ω 2µA 3.9mm 1.7mm
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. 124-9924
Mfr. Part No.1N5369BRLG
$0.198
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 -
RS Stock No. 170-3547
Mfr. Part No.1N5929BRLG
$0.14
Each (On a Reel of 6000)
units
Single 15V Through Hole 1 3 W Case 59-10 Voltage Regulator 5% 2 25mA 9 Ω, 600 Ω 250nA - 2.7mm
RS Stock No. 178-7623
Mfr. Part No.1N4747ATR
$0.065
Each (On a Reel of 3000)
units
Single 20V Through Hole 1 1 W DO-41 General Purpose 5% 2 12.5mA 22Ω 5µA 5.2mm 2.72mm
RS Stock No. 544-3632
Mfr. Part No.BZX79-C7V5,113
BrandNexperia
$0.186
Each (In a Pack of 20)
units
Single 7.5V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 15Ω 1µA 4.25mm -
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. 166-1228
Mfr. Part No.BZV85-C5V1,113
BrandNexperia
$0.065
Each (On a Reel of 5000)
units
Single 5.1V Through Hole 1 1.3 W DO-41 Voltage Regulator 5% 2 45mA 10Ω 3µA 4.8mm -
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. 812-8544
Mfr. Part No.BZX55B33-TR
BrandVishay
$0.066
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 1.7mm
RS Stock No. 123-1405
Mfr. Part No.Z1SMA33 TRTB
$0.153
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 -
RS Stock No. 819-3756
Mfr. Part No.SMBZ5929B-E3/52
BrandVishay
$0.475
Each (In a Pack of 20)
units
Single 15V Surface Mount 1 3 W DO-214AA (SMB) Voltage Regulator 5% 2 25mA 1µA 4.57mm -
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 -
RS Stock No. 145-2266
Mfr. Part No.SMAZ5929B-E3/61
BrandVishay
$0.174
Each (On a Reel of 1800)
units
Single 15V Surface Mount 1 500 mW DO-214AC (SMA) Voltage Regulator 5% 2 25mA 1µA 4.5mm -
RS Stock No. 178-7104
Mfr. Part No.BZX84-C18,215
BrandNexperia
$0.041
Each (On a Reel of 3000)
units
Single 18V Surface Mount 1 250 mW SOT-23 (TO-236AB) Voltage Regulator 5% 3 5mA 45Ω 50nA 3mm -
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. 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. 818-5001
Mfr. Part No.TZX2V4B-TR
BrandVishay
$0.08
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 1.7mm
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