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What is a Zener Diode?

Zener diodes are a special kind of diode which permits current to flow in the forward direction. What makes them different from other diodes is that Zener diodes will also allow current to flow in the reverse direction when the voltage is above a certain value. This breakdown voltage is known as the Zener voltage. In a standard diode, the Zener voltage is high, and the diode is permanently damaged if a reverse current above that value is allowed to pass through it. Zener diodes are designed in a way where the Zener voltage is a much lower value. There is a controlled breakdown which does not damage the diode when a reverse current above the Zener voltage passes through a Zener diode.

Types of Zener Diodes

There are many different kinds of Zener diodes. At Future Electronics we stock many of the most common types categorized by power dissipation, nominal working voltage, forward (drive) current, forward voltage, packaging type and maximum reverse current. The parametric filters on our website can help refine your search results depending on the required specifications.

The most common values for nominal working voltage are 5.1 V, 5.6 V, 6.2 V, 12 V and 15 V. We also carry Zener diodes with nominal working voltage up to 1 kV. Forward (drive) current can have a range from 200 uA to 200 A, with the most common forward (drive) current being 10 mA or 200 mA.

Zener Diodes from Future Electronics

Future Electronics has a full Zener diode chip selection from several manufacturers when designing a circuit and looking for a Zener diode regulator, low voltage Zener diode, high voltage Zener diode, power Zener diode, Zener diode rectifier, 3v Zener diode, 5v Zener diode, 12v Zener diode, 18v Zener diode, 24v Zener diode or for any Zener diode circuits. Simply choose from the Zener diode technical attributes below and your search results will quickly be narrowed in order to match your specific Zener diode application needs.

If you have a preferred brand, we deal with several semiconductor manufacturers such as Fairchild, NXP, Diodes Inc., ON Semiconductor or Vishay, among other chip manufacturers. You can easily refine your Zener diode product search results by clicking your preferred Zener diode brand below from our list of manufacturers.

Applications for Zener Diodes:

Zener diodes can be found in several applications. Some of these are: voltage stabilizers or regulators (in shunt mode), surge suppressors for device protection, peak clippers, switching operations, reference elements and in meter protection applications. The constant reverse voltage of a Zener diode renders it a very useful component in regulating the output voltage against variations in the load resistance or variations in the input voltage from an unregulated power supply. The current through the Zener diode will change in order to keep the voltage within the threshold limits of Zener action and the maximum power that it can dissipate.

Choosing the Right Zener Diode:

When you are looking for the right Zener diodes, with the FutureElectronics.com parametric search, you can filter the results by various attributes: by Forward (Drive) Current (200 uA, 10 mA, 200 mA, 250 mA, 1A,…), Forward Voltage (700 mV, 900 mV, 1.1 V, 1.2 V, 1.5V,…) and Power Dissipation (from 100 mW to 1.5 kW) to name a few. You will be able to find the right semiconductor chip when designing a circuit that requires a Zener diode regulator, power Zener diode, 5v Zener diode, 12v Zener diode, 18v Zener diode, 24v Zener diode, high voltage Zener diode, low voltage Zener diode, Zener diode rectifier, 3v Zener diode or for designing any Zener diode circuits.

Zener Diodes in Production Ready Packaging or R&D Quantities

If the quantity of Zener diodes that you require is less than a full reel, we offer customers many of our Zener diode products in tube, tray or individual quantities that will help you avoid unneeded surplus.

In addition, Future Electronics offers clients a unique bonded inventory program that is designed to eliminate potential problems that could arise from an unpredictable supply of products containing raw metals and products with long or erratic lead times. Talk with your nearest Future Electronics branch and find out more on how you and your company can avoid possible shortages.




Zener Diodes by Primary Attributes:

By Forward (Drive) Current






Featured Zener Diode Products


Manufacturer Part Number Description
Diodes Inc. MMSZ5230B-7-F MMSZ5230B-7 Series 500 mW 4.7 V 10 mA Surface Mount Zener Diode - SOD-123
Diodes Inc. BZT52C12-7-F BZT52C12 Series 500 mW 12 V 10 mA Surface Mount Zener Diode - SOD-123
Diodes Inc. MMSZ5246B-7-F MMSZ5246B-7 Series 500 mW 16 V 10 mA Surface Mount Zener Diode - SOD-123
Diodes Inc. BZX84C12-7-F BZX84C12 Series 350 mW 12 V 10 mA Surface Mount Zener Diode - SOT-23
Fairchild 1N4749ATR 1N4749 Series 1 W 24 V 5 uA Through Hole Zener Diode - DO-41
Fairchild MMBZ5230B MMBZ5230B Series 350 mW 4.7 V 10 mA Surface Mount Zener Diode - SOT-23-3
Fairchild MM5Z20V MM5Z20V Series 200 mW 20 V 0.05 uA Surface Mount Zener Diode - SOD-523F
Fairchild 1N5237BTR 1N5237 Series 500 mW 8.2 V 200 mA Through Hole Zener Diode - DO-35
NXP BZX84-C5V1,215 BZX84 Series 5.1 V 200 mA Surface Mount Voltage Regulator Diode - SOT-23-3
NXP BZX84-C18,235 BZX84 Series 18 V 200 mA Surface Mount Voltage Regulator Diode - SOT-23-3
NXP BZX585-C9V1,115 BZX585 Series 9.1 V 200 mA SMT Voltage Regulator Diode - SOD-523
NXP 1N4735A,113 1N4735A Series 6.2 V 500 mA Through Hole Voltage Regulator Diode - DO-41
NXP BZX585-C2V4,115 BZX585 Series 2.4 V 200 mA SMT Voltage Regulator Diode - SOD-523
NXP BZX84-C5V6,215 BZX84 Series 5.6 V 200 mA Surface Mount Voltage Regulator Diode - SOT-23-3
NXP BZX84-C6V2,215 BZX84 Series 6.2 V 200 mA Surface Mount Voltage Regulator Diode - SOT-23-3
NXP BZX84-C15,215 BZX84 Series 15 V 200 mA Surface Mount Voltage Regulator Diode - SOT-23-3
ON Semiconductor BZX84C4V7LT1G BZX84C4V7LT1 Series 225 mW 10 mA 4.7 V SMT Zener Voltage Regulator - SOT-23-3
ON Semiconductor BZX84C3V3LT1G BZX84C3V3LT1 Series 225 mW 10 mA 3.3 V SMT Zener Voltage Regulator - SOT-23-3
ON Semiconductor BZX84C6V8LT1G BZX84C6V8LT1 Series 225 mW 10 mA 6.8 V SMT Zener Voltage Regulator - SOT-23-3
ON Semiconductor MMBZ5248BLT1G MMBZ5248BL Series 225 mW 10 mA 18 V SMT Zener Voltage Regulator - SOT-23-3
ON Semiconductor MMBZ5245BLT1G MMBZ5245BL Series 225 mW 10 mA 15 V SMT Zener Voltage Regulator - SOT-23-3
Vishay 1N4735A-TR 1N4735A Series 1.3 W 6.2 V 200 mA 5 % Tolerance Through Hole Zener Diode - DO-41
Vishay ZM4744A-GS08 ZM4744A Series 1 W 15 V 5 % Tolerance Zener Diode - MELF Glass Case
Vishay ZM4738A-GS08 ZM4738A Series 1 W 8.2 V 5 % Tolerance Zener Diode - MELF Glass Case
Vishay TZM5245B-GS08 TZM5245B Series 500 mW 15 V 5 % Tolerance Small Signal Zener Diode - SOD-80

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