Littelfuse Inc.
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V420LA40B
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V420LA40B

Product Overview

Category

The V420LA40B belongs to the category of varistors, which are electronic components used for voltage regulation and surge protection.

Use

It is used to protect sensitive electronic devices from voltage spikes and transient overvoltage conditions.

Characteristics

  • Voltage Regulation
  • Surge Protection
  • Fast Response Time
  • High Energy Absorption Capacity

Package

The V420LA40B is typically available in a disc-shaped package with leads for easy integration into electronic circuits.

Essence

The essence of the V420LA40B lies in its ability to limit excessive voltage and protect connected devices from damage.

Packaging/Quantity

It is commonly packaged in reels or trays, and the quantity per package varies based on the supplier.

Specifications

  • Maximum Allowable Voltage: 420V
  • Peak Current Capability: 10kA
  • Energy Absorption: 360J
  • Operating Temperature Range: -40°C to 85°C
  • Lead Material: Tin-plated Copper

Detailed Pin Configuration

The V420LA40B typically has two leads for connection to the circuit. The pin configuration is as follows: 1. Anode (+) 2. Cathode (-)

Functional Features

  • Non-linear voltage-current characteristics
  • Rapid response to voltage transients
  • Low leakage current
  • High energy absorption capability

Advantages and Disadvantages

Advantages

  • Effective protection against voltage surges
  • Fast response time
  • Wide operating temperature range
  • Reliable performance

Disadvantages

  • Limited lifespan after repeated surges
  • Can degrade over time with exposure to high energy events

Working Principles

The V420LA40B operates based on the principle of varistor action, where its resistance decreases with increasing voltage, thereby diverting excess current away from sensitive components.

Detailed Application Field Plans

The V420LA40B is commonly used in various applications including: - Power Supplies - Telecommunications Equipment - Industrial Control Systems - Consumer Electronics - Automotive Electronics

Detailed and Complete Alternative Models

Some alternative models to the V420LA40B include: - V250LA40B - V130LA20A - V275LA40BP

In conclusion, the V420LA40B varistor is a crucial component in protecting electronic devices from voltage surges and transient overvoltage conditions. Its fast response time, high energy absorption capacity, and wide application field make it an essential part of modern electronic systems.

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Liste 10 almindelige spørgsmål og svar relateret til anvendelsen af V420LA40B i tekniske løsninger

  1. What is the maximum voltage rating of V420LA40B?

    • The maximum voltage rating of V420LA40B is 420V.

  2. What is the maximum surge current capability of V420LA40B?

    • V420LA40B has a maximum surge current capability of 10,000A.

  3. What is the operating temperature range for V420LA40B?

    • The operating temperature range for V420LA40B is -40°C to +85°C.

  4. What is the typical capacitance of V420LA40B?

    • The typical capacitance of V420LA40B is 120pF.

  5. What are the dimensions of V420LA40B?

    • The dimensions of V420LA40B are 7.6mm x 8.9mm x 10.7mm.

  6. What is the response time of V420LA40B?

    • The response time of V420LA40B is less than 5 nanoseconds.

  7. Is V420LA40B suitable for overvoltage protection in power supplies?

    • Yes, V420LA40B is suitable for overvoltage protection in power supplies.

  8. Can V420LA40B be used in surge protection for telecommunications equipment?

    • Yes, V420LA40B can be used in surge protection for telecommunications equipment.

  9. Does V420LA40B comply with relevant safety standards?

    • Yes, V420LA40B complies with UL1449 and IEC 61000-4-5 safety standards.

  10. What is the expected lifespan of V420LA40B in typical applications?

    • The expected lifespan of V420LA40B in typical applications is 10 years or more.