Zener Diodes

Zener diodes are a type of semiconductor device that has different characteristics from a normal diode. Zener diodes allow current to flow from its anode to its cathode in either a forward or reverse direction, but only when exposed to enough voltage.

How does a Zener diode work?

Zener diodes are designed to change the direction of the 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 changes the direction of flow is called Zener Voltage or Breakdown Voltage. It could be defined for specific diodes anywhere from 1.8 to 200 V.

Types of Zener diodes

Zener diodes are offered in an array of different configurations such as different levels of power dissipation, mount types, and different configurations.

There are also different types of Zener diodes such as:

  • Avalanche
  • Bi-Directional
  • ESD Protection
  • General Purpose
  • Ultra-small

Typical applications 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. Zener diodes work reliably in the breakdown region, unlike normal diodes which would overheat. They are the most common and handiest solutions to a number of needs in a circuit design.


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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 Dimensions Automotive Standard
RS Stock No. 805-2787
Mfr. Part No.MMBZ5242ELT1G
MYR0.302
Each (On a Tape of 200)
units
Single 12V Surface Mount 1 300 mW SOT-23 Voltage Regulator - 3 20mA 30Ω 1µA 3.04 x 1.4 x 1.01mm -
RS Stock No. 145-3207
Mfr. Part No.MMBZ5242ELT1G
MYR0.166
Each (On a Reel of 3000)
units
Single 12V Surface Mount 1 300 mW SOT-23 Voltage Regulator - 3 20mA 30Ω 1µA 3.04 x 1.4 x 1.01mm -
RS Stock No. 805-0047
Mfr. Part No.1N4733ATR
MYR0.247
Each (In a Pack of 100)
units
Single 5.1V Through Hole 1 1 W DO-41 General Purpose 5% 2 49mA 10µA 2.72 (Dia.) x 5.2mm -
RS Stock No. 178-4826
Mfr. Part No.1N5364BG
MYR0.678
Each (In a Bag of 1000)
units
Single 33V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 40mA 10Ω 500nA 8.89 x 3.68 x 3.68mm -
RS Stock No. 163-2331
Mfr. Part No.1N5362BRLG
MYR0.598
Each (On a Reel of 4000)
units
Single 28V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 50mA 500nA 8.89 x 3.68 x 3.68mm -
RS Stock No. 463-369
Mfr. Part No.1N5364BG
MYR2.071
Each (In a Pack of 10)
units
Single 33V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 40mA 10Ω 500nA 8.89 x 3.68 x 3.68mm -
RS Stock No. 186-8758
Mfr. Part No.1N5362BG
MYR0.689
Each (In a Box of 1000)
units
Single 28V Through Hole 1 5 W CASE 017AA Voltage Regulator ±5% 2 50mA 130Ω 500nA 3.68 (Dia.) x 8.89mm -
RS Stock No. 186-9203
Mfr. Part No.1N5362BG
MYR1.816
Each (In a Pack of 25)
units
Single 28V Through Hole 1 5 W CASE 017AA Voltage Regulator ±5% 2 50mA 130Ω 500nA 3.68 (Dia.) x 8.89mm -
RS Stock No. 178-7631
Mfr. Part No.1N5364BRLG
MYR0.548
Each (On a Reel of 4000)
units
Single 33V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 40mA 10Ω 500nA 8.89 x 3.68 x 3.68mm -
RS Stock No. 625-6439
Mfr. Part No.1N5362BRLG
MYR2.126
Each (In a Pack of 5)
units
Single 28V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 50mA 500nA 8.89 x 3.68 x 3.68mm -
RS Stock No. 625-6467
Mfr. Part No.1N5364BRLG
MYR2.268
Each (In a Pack of 5)
units
Single 33V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 40mA 10Ω 500nA 8.89 x 3.68 x 3.68mm -
RS Stock No. 654-7549
Mfr. Part No.1N5339BRLG
MYR2.142
Each (In a Pack of 5)
units
Single 5.6V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 220mA 1µA 8.89 x 3.68 x 3.68mm -
RS Stock No. 463-791
Mfr. Part No.1N5339BG
MYR1.865
Each (In a Pack of 10)
units
Single 5.6V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 220mA 1µA 8.89 x 3.68 x 3.68mm -
RS Stock No. 102-1393
Mfr. Part No.1N5339BG
MYR0.569
Each (In a Box of 1000)
units
Single 5.6V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 220mA 1µA 8.89 x 3.68 x 3.68mm -
RS Stock No. 103-3913
Mfr. Part No.1N5339BRLG
MYR0.544
Each (On a Reel of 4000)
units
Single 5.6V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 220mA 1µA 8.89 x 3.68 x 3.68mm -
RS Stock No. 145-3697
Mfr. Part No.1SMB5931BT3G
MYR0.424
Each (On a Reel of 2500)
units
Single 18V Surface Mount 1 3 W SMB Voltage Regulator 5% 2 20.8mA 12Ω 1µA 4.6 x 3.95 x 2.28mm -
RS Stock No. 807-9903
Mfr. Part No.1SMB5931BT3G
MYR0.71
Each (In a Pack of 100)
units
Single 18V Surface Mount 1 3 W SMB Voltage Regulator 5% 2 20.8mA 12Ω 1µA 4.6 x 3.95 x 2.28mm -
RS Stock No. 163-0833
Mfr. Part No.1N5336BG
MYR0.696
Each (In a Box of 1000)
units
Single 4.3V Through Hole 1 5 W Surmetic 40 Voltage Regulator 5% 2 290mA 500Ω 10µA 3.68 (Dia.) x 8.89mm -
RS Stock No. 774-3280
Mfr. Part No.1N5336BG
MYR1.848
Each (In a Pack of 10)
units
Single 4.3V Through Hole 1 5 W Surmetic 40 Voltage Regulator 5% 2 290mA 500Ω 10µA 3.68 (Dia.) x 8.89mm -
RS Stock No. 103-5046
Mfr. Part No.1N5365BRLG
MYR0.613
Each (On a Reel of 4000)
units
Single 36V Through Hole 1 5 W DO-15 Voltage Regulator 5% 2 30mA 11Ω 500nA 8.89 x 3.68 x 3.68mm -