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1N4743 Zener Diode (Pack of 2)

SKU: 9FT532WXPS
The 1N4743 Zener Diode is a high-performance voltage regulation diode designed to provide a stable 13V Zener voltage for electronic circuits. With a 1-Watt power dissipation rating, it is widely used for voltage regulation, reference voltage generation, and protection against overvoltage conditions. Operating in reverse bias mode, the diode maintains a nearly constant voltage across its terminals once the Zener...
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Specifications

Specifications:

Part Number: 1N4743
Zener Voltage (Vz): 13V
Power Dissipation: 1W
Package Type: DO-41
Mounting Type: Through-Hole
Polarity: Cathode marked with a band
Operating Mode: Reverse Breakdown (Zener Region)

Additional Resources

1N4743.PDF

FAQ

1. What is a Zener diode?

A Zener diode is a special type of semiconductor diode designed to operate in reverse bias mode and maintain a stable voltage across its terminals, making it useful for voltage regulation and protection circuits.

2. What are the common applications of a Zener diode?

Zener diodes are commonly used for voltage regulation, voltage reference generation, overvoltage protection, clipping circuits, and power supply stabilization in electronic devices.

3. How does a Zener diode regulate voltage?

When the reverse voltage applied to a Zener diode reaches its Zener breakdown voltage, the diode conducts current while maintaining a nearly constant voltage across itself, helping regulate the output voltage.

4. Can a Zener diode be used for circuit protection?

Yes, Zener diodes are widely used to protect sensitive electronic components from voltage spikes and overvoltage conditions by limiting the voltage to a safe level.

5. What should be considered when selecting a Zener diode?

Important factors include the Zener voltage rating, power dissipation capability, package type, tolerance, and the current requirements of the intended application.

View full product details

The 1N4743 Zener Diode is a high-performance voltage regulation diode designed to provide a stable 13V Zener voltage for electronic circuits. With a 1-Watt power dissipation rating, it is widely used for voltage regulation, reference voltage generation, and protection against overvoltage conditions. Operating in reverse bias mode, the diode maintains a nearly constant voltage across its terminals once the Zener breakdown voltage is reached, helping ensure reliable and stable circuit operation.

Encased in the industry-standard DO-41 axial-lead package, the 1N4743 offers excellent mechanical durability, easy through-hole mounting, and long-term reliability. It is commonly used in power supplies, industrial control systems, communication equipment, embedded electronics, and general-purpose electronic projects where stable voltage control is required.

Key Features

  • Stable 13V Zener breakdown voltage
  • 1W power dissipation capability
  • Excellent voltage regulation characteristics
  • Reliable protection against voltage spikes and surges
  • Standard DO-41 axial-lead package
  • Easy through-hole PCB installation
  • Durable construction for long service life
  • Suitable for commercial, industrial, and educational applications

Applications

  • Voltage regulation and stabilization circuits
  • Reference voltage generation
  • Power supply protection
  • Overvoltage suppression
  • Signal clipping and clamping circuits
  • Microcontroller and embedded system projects
  • Consumer electronics and industrial automation equipment