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. 103-7574
Mfr. Part No.BZX79-C5V1,113
BrandNexperia
$0.025
Each (On a Reel of 10000)
units
Single 5.1V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 60Ω 2µA 4.25mm -
RS Stock No. 544-3597
Mfr. Part No.BZX79-C5V1,113
BrandNexperia
$0.186
Each (In a Pack of 20)
units
Single 5.1V Through Hole 1 500 mW DO-35 Voltage Regulator 5% 2 5mA 60Ω 2µA 4.25mm -
RS Stock No. 136-4856
Mfr. Part No.BZX79-C5V1,133
BrandNexperia
$0.066
Each (In a Pack of 100)
units
Single 5.1V Through Hole 1 500 mW SOD27 (DO-35) Voltage Regulator ±2 %, ±5 % 2 5mA 480 Ω @ 1 mA - 4.25mm 1.85mm
RS Stock No. 136-4788
Mfr. Part No.BZX79-C5V1,133
BrandNexperia
$0.028
Each (On a Tape of 10000)
units
Single 5.1V Through Hole 1 500 mW SOD27 (DO-35) Voltage Regulator ±2 %, ±5 % 2 5mA 480 Ω @ 1 mA - 4.25mm 1.85mm
RS Stock No. 625-6445
Mfr. Part No.1N5333BRLG
$0.542
Each (In a Pack of 5)
units
Single 3.3V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 380mA 300µA 8.89mm -
RS Stock No. 103-3897
Mfr. Part No.1N5333BRLG
$0.178
Each (On a Reel of 4000)
units
Single 3.3V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 380mA 300µA 8.89mm -
RS Stock No. 463-379
Mfr. Part No.1N5333BG
$0.55
Each (In a Pack of 10)
units
Single 3.3V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 380mA 300µA 8.89mm -
RS Stock No. 100-9507
Mfr. Part No.1N5333BG
$0.224
Each (In a Box of 1000)
units
Single 3.3V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 380mA 300µA 8.89mm -
RS Stock No. 625-6451
Mfr. Part No.1N5338BRLG
$0.55
Each (In a Pack of 5)
units
Single 5.1V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 240mA 1.5Ω 1µA 8.89mm -
RS Stock No. 100-7581
Mfr. Part No.1N5338BG
$0.224
Each (In a Box of 1000)
units
Single 5.1V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 240mA 1.5Ω 1µA 8.89mm -
RS Stock No. 103-3898
Mfr. Part No.1N5338BRLG
$0.204
Each (On a Reel of 4000)
units
Single 5.1V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 240mA 1.5Ω 1µA 8.89mm -
RS Stock No. 463-274
Mfr. Part No.1N5338BG
$0.55
Each (In a Pack of 10)
units
Single 5.1V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 240mA 1.5Ω 1µA 8.89mm -
RS Stock No. 812-342
Mfr. Part No.BZX85C3V0
BrandMagnatec
$0.774
Each (In a Pack of 5)
units
Single 3V Through Hole 1 1.3 W DO-41 Voltage Regulator 5% 2 80mA 400Ω 100µA 4.1mm 2.5mm
RS Stock No. 818-5061
Mfr. Part No.TZX3V9C-TR
BrandVishay
$0.057
Each (In a Pack of 200)
units
Single 4V Through Hole 1 500 mW DO-35 Voltage Regulator 3% 2 5mA 100Ω 5µA 3.9mm 1.7mm
RS Stock No. 159-6583
Mfr. Part No.TZX3V9C-TR
BrandVishay
$0.038
Each (On a Reel of 10000)
units
Single 4V Through Hole 1 500 mW DO-35 Voltage Regulator 3% 2 5mA 100Ω 5µA 3.9mm 1.7mm
RS Stock No. 100-7582
Mfr. Part No.1N5349BG
$0.224
Each (In a Box of 1000)
units
Single 12V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 100mA 2.5Ω 2µA 8.89mm -
RS Stock No. 103-3903
Mfr. Part No.1N5349BRLG
$0.207
Each (On a Reel of 4000)
units
Single 12V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 100mA 2.5Ω 2µA 8.89mm -
RS Stock No. 625-6568
Mfr. Part No.1N5349BRLG
$0.55
Each (In a Pack of 10)
units
Single 12V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 100mA 2.5Ω 2µA 8.89mm -
RS Stock No. 163-1978
Mfr. Part No.1SMB5949BT3G
$0.153
Each (On a Reel of 2500)
units
Single 100V Surface Mount 1 3 W SMB Voltage Regulator 5% 2 3.7mA 250Ω 1µA 4.6mm -
RS Stock No. 463-278
Mfr. Part No.1N5349BG
$0.55
Each (In a Pack of 10)
units
Single 12V Through Hole 1 5 W 017AA-01 Voltage Regulator ±5% 2 100mA 2.5Ω 2µA 8.89mm -
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