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1N4990
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1N4990 Diode

Product Overview

Category

The 1N4990 diode belongs to the category of semiconductor devices.

Use

It is commonly used as a rectifier in electronic circuits to convert alternating current (AC) to direct current (DC).

Characteristics

  • Forward Voltage Drop: Typically around 0.7V
  • Reverse Leakage Current: Low leakage current at reverse bias
  • Maximum Reverse Voltage: V_RRM = 50V
  • Maximum Forward Current: I_F = 1A

Package

The 1N4990 diode is typically available in a DO-41 axial lead package.

Packaging/Quantity

It is commonly packaged in reels, tubes, or bulk quantities, depending on the manufacturer.

Specifications

  • Maximum Reverse Voltage (V_RRM): 50V
  • Average Rectified Forward Current (I_F(AV)): 1A
  • Peak Surge Forward Current (I_FSM): 30A
  • Operating Temperature Range: -65°C to +175°C

Detailed Pin Configuration

The 1N4990 diode has two leads, with the cathode marked by a band on the body of the diode.

Functional Features

The 1N4990 diode acts as a one-way valve for electric current, allowing current to flow in only one direction and blocking it in the opposite direction.

Advantages and Disadvantages

Advantages

  • Low forward voltage drop
  • Low reverse leakage current
  • High surge current capability

Disadvantages

  • Relatively low maximum reverse voltage compared to other diodes
  • Limited current handling capacity compared to higher power diodes

Working Principles

The 1N4990 diode operates based on the principle of creating a depletion region within the semiconductor material when reverse-biased, effectively preventing current flow. When forward-biased, it allows current to flow with minimal resistance.

Detailed Application Field Plans

The 1N4990 diode finds applications in various electronic circuits, including: - Power supplies - Battery chargers - Voltage regulators - Signal demodulation circuits

Detailed and Complete Alternative Models

Some alternative models to the 1N4990 diode include: - 1N4001: Similar characteristics with a slightly lower maximum reverse voltage - 1N5408: Higher voltage and current ratings for more demanding applications - 1N4148: Fast switching diode with lower current and voltage ratings

In conclusion, the 1N4990 diode is a versatile semiconductor device commonly used in electronic circuits for rectification purposes. Its low forward voltage drop and low reverse leakage current make it suitable for various low-power applications. However, its relatively low maximum reverse voltage and current handling capacity should be considered when selecting it for specific designs.

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10個與1N4990在技術方案中應用相關的常見問題與解答

  1. What is 1N4990?

    • 1N4990 is a silicon rectifier diode commonly used in electronic circuits for converting alternating current (AC) to direct current (DC).

  2. What are the key specifications of 1N4990?

    • The 1N4990 diode has a maximum repetitive peak reverse voltage of 200 volts, a maximum average forward rectified current of 1 ampere, and a typical forward voltage drop of 1 volt at 1 ampere.

  3. How is 1N4990 typically used in technical solutions?

    • 1N4990 is often used in power supply circuits, battery chargers, voltage regulators, and other applications where AC to DC conversion is required.

  4. What are the important considerations when using 1N4990 in a circuit?

    • It's crucial to consider the maximum voltage and current requirements of the circuit, as well as the thermal characteristics of the diode to ensure proper heat dissipation.

  5. Can 1N4990 be used in high-frequency applications?

    • No, 1N4990 is not suitable for high-frequency applications due to its relatively slow recovery time.

  6. Are there any common failure modes associated with 1N4990?

    • Common failure modes include overheating due to excessive current or voltage, as well as potential damage from reverse voltage spikes.

  7. What are some alternative diodes that can be used in place of 1N4990?

    • Alternatives include 1N4001, 1N4004, and 1N4007, which have similar voltage and current ratings.

  8. How should 1N4990 be properly handled and stored?

    • The diode should be stored in a cool, dry environment and handled with care to avoid static discharge or physical damage.

  9. Can 1N4990 be used in automotive applications?

    • Yes, 1N4990 can be used in automotive circuits such as voltage regulators and battery charging systems, provided it meets the necessary voltage and current requirements.

  10. Where can I purchase 1N4990 diodes?

    • 1N4990 diodes can be purchased from electronic component distributors, online retailers, and local electronics stores.