Taiwan Semiconductor Corporation
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1N4746A R0G
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1N4746A R0G

Product Overview

Category

The 1N4746A R0G belongs to the category of Zener diodes.

Use

It is commonly used for voltage regulation and stabilization in electronic circuits.

Characteristics

  • Zener voltage: 18V
  • Power dissipation: 1.3W
  • Package type: DO-41
  • Operating temperature range: -65°C to +200°C
  • Tolerance: ±5%

Packaging/Quantity

The 1N4746A R0G is typically available in reels or bulk packaging, with quantities varying based on supplier and customer requirements.

Specifications

  • Zener voltage: 18V
  • Power dissipation: 1.3W
  • Maximum forward voltage: 1.2V
  • Reverse current: 5μA
  • Temperature coefficient: 5mV/°C

Detailed Pin Configuration

The 1N4746A R0G has a standard DO-41 package with two leads. The anode is connected to the positive terminal, while the cathode is connected to the negative terminal.

Functional Features

The 1N4746A R0G provides a constant voltage output when reverse biased, making it suitable for voltage regulation applications. It exhibits sharp breakdown characteristics and low dynamic impedance.

Advantages and Disadvantages

Advantages

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

Disadvantages

  • Limited power dissipation capability
  • Sensitivity to temperature variations

Working Principles

When the Zener diode is reverse biased and the voltage across it reaches the Zener voltage, it starts conducting, maintaining a nearly constant voltage drop across its terminals.

Detailed Application Field Plans

The 1N4746A R0G is widely used in various electronic circuits such as voltage regulators, overvoltage protection, and voltage references. It finds applications in power supplies, instrumentation, and automotive electronics.

Detailed and Complete Alternative Models

  • 1N4730A R0G (Zener voltage: 3.9V)
  • 1N4733A R0G (Zener voltage: 5.1V)
  • 1N4739A R0G (Zener voltage: 9.1V)

In summary, the 1N4746A R0G Zener diode offers precise voltage regulation and finds extensive use in diverse electronic applications, despite its limitations in power dissipation and temperature sensitivity. Its working principle involves maintaining a constant voltage drop when reverse biased, making it suitable for various voltage regulation tasks. Additionally, alternative models with different Zener voltages are available to cater to specific application requirements.

Перечислите 10 распространенных вопросов и ответов, связанных с применением 1N4746A R0G в технических решениях.

  1. What is the 1N4746A R0G?

    • The 1N4746A R0G is a Zener diode with a voltage rating of 18V and a power dissipation of 1W.

  2. What are the typical applications of the 1N4746A R0G?

    • It is commonly used in voltage regulation, voltage reference, and overvoltage protection circuits.

  3. What is the maximum current that can flow through the 1N4746A R0G?

    • The maximum current for reliable operation is typically around 40-50 mA.

  4. How does the 1N4746A R0G provide voltage regulation?

    • It operates in the reverse breakdown region, maintaining a nearly constant voltage across its terminals.

  5. Can the 1N4746A R0G be used for overvoltage protection?

    • Yes, it can be used to clamp the voltage at a specific level, protecting downstream components from excessive voltage.

  6. What are the key characteristics to consider when selecting the 1N4746A R0G for a design?

    • Voltage rating, power dissipation, and tolerance are important factors to consider.

  7. Is the 1N4746A R0G suitable for low-power applications?

    • Yes, it is commonly used in low-power circuits due to its 1W power dissipation rating.

  8. What is the temperature coefficient of the 1N4746A R0G?

    • The temperature coefficient is typically around -2 mV/°C, indicating a relatively stable voltage reference over temperature.

  9. Can multiple 1N4746A R0G diodes be connected in series or parallel?

    • Yes, they can be connected in series to increase the total breakdown voltage or in parallel to share the current load.

  10. Are there any precautions to consider when using the 1N4746A R0G in a circuit?

    • It's important to ensure proper heat dissipation and avoid exceeding the maximum power dissipation to prevent damage to the diode.