ON Semiconductor
Bild kan vara representation.
Se specifikationer för produktinformation.
1N4743A
Visa detalj Datablad

1N4743A - Zener Diode

Introduction

The 1N4743A is a popular zener diode that belongs to the category of semiconductor devices. It is widely used in electronic circuits for voltage regulation and protection due to its unique characteristics. This entry provides an overview of the 1N4743A, including its basic information, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.

Basic Information Overview

  • Category: Semiconductor device
  • Use: Voltage regulation and protection
  • Characteristics: Zener voltage, power dissipation, temperature range
  • Package: Axial leaded, surface mount
  • Essence: Voltage stabilization
  • Packaging/Quantity: Available in various packaging options with different quantities

Specifications

  • Zener Voltage: 13V
  • Power Dissipation: 1.0W
  • Temperature Range: -65°C to +200°C
  • Tolerance: ±5%

Detailed Pin Configuration

The 1N4743A zener diode has a standard axial leaded package with two leads. The anode is connected to one lead, while the cathode is connected to the other lead.

Functional Features

  • Voltage Regulation: The 1N4743A maintains a constant voltage across its terminals, making it suitable for voltage regulation applications.
  • Overvoltage Protection: It acts as a protective device by diverting excessive voltage away from sensitive components in a circuit.

Advantages and Disadvantages

Advantages

  • Precise voltage regulation
  • Compact size
  • Wide operating temperature range

Disadvantages

  • Limited power dissipation capability
  • Tolerance may not be suitable for highly precise applications

Working Principles

The 1N4743A operates based on the principle of the zener effect, where it maintains a nearly constant voltage drop across its terminals when reverse biased. This allows it to regulate voltage within a circuit.

Detailed Application Field Plans

The 1N4743A is commonly used in various electronic applications, including: - Voltage regulators - Power supplies - Overvoltage protection circuits

Detailed and Complete Alternative Models

Some alternative models to the 1N4743A include: - 1N4739A - 1N4742A - BZX55C13

In conclusion, the 1N4743A zener diode is a versatile semiconductor device with specific voltage regulation and protection capabilities. Its unique characteristics, functional features, and application versatility make it a valuable component in electronic circuits.

[Word count: 366]

Lista 10 Vanliga frågor och svar relaterade till tillämpningen av 1N4743A i tekniska lösningar

  1. What is the 1N4743A diode used for?

    • The 1N4743A is a Zener diode commonly used for voltage regulation and voltage reference applications.

  2. What is the voltage rating of the 1N4743A diode?

    • The 1N4743A has a nominal voltage of 13 volts.

  3. How does the 1N4743A diode regulate voltage?

    • The 1N4743A operates in the reverse breakdown region, maintaining a nearly constant voltage across its terminals when it is reverse biased.

  4. Can the 1N4743A be used for overvoltage protection?

    • Yes, the 1N4743A can be used to protect sensitive components from overvoltage by shunting excess current when the voltage exceeds its rated value.

  5. What are typical applications of the 1N4743A in technical solutions?

    • The 1N4743A is commonly used in power supplies, voltage regulators, and as a voltage reference in various electronic circuits.

  6. What is the maximum power dissipation of the 1N4743A?

    • The 1N4743A has a maximum power dissipation of 1 watt.

  7. What is the temperature coefficient of the 1N4743A?

    • The temperature coefficient of the 1N4743A is typically around -2.2 mV/°C.

  8. Can multiple 1N4743A diodes be connected in series or parallel?

    • Multiple 1N4743A diodes can be connected in series to increase the breakdown voltage or in parallel to increase the current-handling capacity.

  9. What is the forward voltage drop of the 1N4743A?

    • The forward voltage drop of the 1N4743A is typically around 1.2 volts at a specified current.

  10. Are there any precautions to consider when using the 1N4743A in technical solutions?

    • It's important to ensure that the maximum power dissipation and current ratings are not exceeded, and to consider the temperature effects on the diode's performance in the application.