Littelfuse Inc.
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V420LA20AP
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V420LA20AP

Product Overview

Category

The V420LA20AP belongs to the category of varistors, which are electronic components used to protect circuits from overvoltage conditions.

Use

It is used to suppress transient voltage spikes and limit the voltage that can appear across an electronic device.

Characteristics

  • Voltage Rating: 420V
  • Peak Current: 8000A
  • Energy Absorption: 360J
  • Operating Temperature: -40°C to +85°C
  • Package Type: Radial Lead Varistor
  • Essence: Transient voltage suppression
  • Packaging/Quantity: Tape & Reel, 1000 units per reel

Specifications

  • Maximum Allowable Voltage (VM) at 1mA DC: 420V
  • Clamping Voltage (VC) at 8/20µs: 680V
  • Peak Current (IPP) at 8/20µs: 8000A
  • Energy (WTM) at 10/1000µs: 360J
  • **Capacitance (C): 1000pF (Typical)

Detailed Pin Configuration

The V420LA20AP has a radial lead package with two leads for through-hole mounting. The pin configuration is as follows: - Pin 1: Anode - Pin 2: Cathode

Functional Features

  • Fast response to transient voltage spikes
  • High energy absorption capability
  • Reliable protection against overvoltage conditions
  • Stable performance over a wide temperature range

Advantages and Disadvantages

Advantages

  • Effective protection of sensitive electronic components
  • Wide operating temperature range
  • High peak current handling capability

Disadvantages

  • Capacitance may affect high-frequency signal integrity
  • Requires careful consideration in high-speed circuit designs

Working Principles

The V420LA20AP operates based on the principle of non-linear voltage-dependent resistance. When a transient voltage spike occurs, the varistor's resistance decreases, diverting the excess current away from the protected circuit.

Detailed Application Field Plans

The V420LA20AP is commonly used in various electronic systems, including: - Power supplies - Telecommunications equipment - Industrial control systems - Automotive electronics - Consumer electronics

Detailed and Complete Alternative Models

Some alternative models to V420LA20AP include: - V275LA20AP - V300LA20AP - V385LA20AP - V460LA20AP

In conclusion, the V420LA20AP varistor offers reliable protection against transient voltage spikes and finds widespread use in diverse electronic applications.

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Énumérez 10 questions et réponses courantes liées à l'application de V420LA20AP dans les solutions techniques

  1. What is the V420LA20AP?

    • The V420LA20AP is a metal oxide varistor (MOV) commonly used for transient voltage suppression in electrical and electronic circuits.

  2. What are the key features of the V420LA20AP?

    • The V420LA20AP offers high surge current capability, low leakage current, and fast response to transient voltage spikes.

  3. How does the V420LA20AP provide overvoltage protection?

    • The V420LA20AP clamps excessive voltage levels by diverting surge currents away from sensitive components, thereby protecting them from damage.

  4. In what applications is the V420LA20AP typically used?

    • The V420LA20AP is commonly employed in power supplies, industrial equipment, telecommunications devices, and consumer electronics for surge protection.

  5. What is the maximum energy absorption capability of the V420LA20AP?

    • The V420LA20AP can absorb significant amounts of energy during transient events, making it suitable for safeguarding against lightning strikes and other high-energy surges.

  6. How does the V420LA20AP compare to other MOVs in terms of performance?

    • The V420LA20AP offers a balance of clamping voltage, surge current handling, and energy absorption capabilities, making it a versatile choice for many applications.

  7. What are the typical failure modes of the V420LA20AP?

    • The V420LA20AP may degrade over time due to repeated exposure to transient events, leading to increased leakage current or reduced clamping performance.

  8. Can the V420LA20AP be used in automotive applications?

    • Yes, the V420LA20AP can be utilized in automotive systems to protect sensitive electronics from voltage transients caused by load dumps, alternator switching, or other sources.

  9. Are there any special considerations for PCB layout when using the V420LA20AP?

    • It's important to minimize the trace length between the V420LA20AP and the protected circuitry to reduce inductance and ensure optimal transient suppression.

  10. What are the recommended storage and operating conditions for the V420LA20AP?

    • The V420LA20AP should be stored in a dry environment at temperatures below 40°C and operated within its specified voltage and current ratings to ensure reliable performance.