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1N4742 Zener Diode (Pack of 2)

SKU: M0EZDZDM61
The 1N4742 Zener Diode is a reliable voltage regulation diode designed to provide a stable 12V Zener voltage in electronic circuits. Featuring a 1-Watt power dissipation rating, this diode is widely used for voltage stabilization, reference voltage generation, and protection against overvoltage conditions. When operated in reverse bias mode, it maintains a nearly constant voltage across its terminals once the...
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Specifications

Specifications:

Part Number: 1N4742
Zener Voltage (Vz): 12V
Power Dissipation: 1W
Package Type: DO-41
Mounting Type: Through-Hole
Polarity: Cathode identified by a band marking
Operating Mode: Reverse Breakdown (Zener Region)

Additional Resources

1N4742.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 1N4742 Zener Diode is a reliable voltage regulation diode designed to provide a stable 12V Zener voltage in electronic circuits. Featuring a 1-Watt power dissipation rating, this diode is widely used for voltage stabilization, reference voltage generation, and protection against overvoltage conditions. When operated in reverse bias mode, it maintains a nearly constant voltage across its terminals once the Zener breakdown voltage is reached, helping ensure consistent and dependable circuit performance.

Packaged in the rugged DO-41 axial-lead package, the 1N4742 offers excellent durability, easy through-hole mounting, and long-term reliability. It is commonly used in power supplies, industrial automation systems, communication equipment, embedded electronics, and a wide range of general-purpose electronic applications.

Key Features

  • Stable 12V Zener breakdown voltage
  • 1W power dissipation capability
  • Excellent voltage regulation characteristics
  • Reliable overvoltage and surge protection
  • Standard DO-41 axial-lead package
  • Through-hole mounting for easy PCB installation
  • Durable construction and long service life
  • Suitable for commercial, industrial, and hobby electronics

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 control equipment