Littelfuse Inc.
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ROV20E221K
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ROV20E221K

Product Overview

Category

The ROV20E221K belongs to the category of electronic components, specifically a varistor.

Use

It is used as a voltage-dependent resistor to protect circuits from excessive voltage surges.

Characteristics

  • Voltage-dependent nonlinear resistor
  • Protects against transient voltage spikes
  • Ceramic disc construction
  • Fast response time

Package

The ROV20E221K is typically available in a disc-shaped package.

Essence

Essentially, the ROV20E221K acts as a protective device for electronic circuits by limiting the voltage across it.

Packaging/Quantity

It is commonly packaged in reels or trays and is available in various quantities depending on the manufacturer.

Specifications

  • Voltage Rating: 20V
  • Nominal Diameter: 20mm
  • Maximum Allowable Voltage: 33V
  • Peak Current (8/20μs): 4500A
  • Energy (10/1000μs): 0.1J
  • Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The ROV20E221K typically has two leads for connection in a circuit. The pin configuration may vary slightly based on the manufacturer's specifications.

Functional Features

  • Provides protection against voltage surges
  • Rapid response to transient overvoltage conditions
  • High energy absorption capability

Advantages

  • Effectively protects sensitive electronic components
  • Fast response time
  • Wide operating temperature range

Disadvantages

  • Limited lifespan after multiple surge events
  • Requires replacement after absorbing high-energy surges

Working Principles

The ROV20E221K operates based on the principle of varistor action, where its resistance decreases with increasing voltage. When a voltage surge occurs, the varistor conducts current, diverting the excess energy away from the protected circuit.

Detailed Application Field Plans

The ROV20E221K is commonly used in various electronic devices and systems, including: - Power supplies - Telecommunication equipment - Industrial control systems - Consumer electronics - Automotive electronics

Detailed and Complete Alternative Models

Some alternative models to the ROV20E221K include: - MOV20D221K - VDRS20E221B - SVR20E221M

In conclusion, the ROV20E221K is a vital component in protecting electronic circuits from voltage surges, offering fast response times and high energy absorption capabilities. While it has limitations such as a limited lifespan after multiple surge events, its advantages make it an essential part of many electronic applications.

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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de ROV20E221K en soluciones técnicas

  1. What is the ROV20E221K?

    • The ROV20E221K is a metal oxide varistor (MOV) that acts as a voltage-dependent resistor, providing protection against transient overvoltage conditions in electronic circuits.

  2. What is the maximum operating voltage of the ROV20E221K?

    • The maximum operating voltage of the ROV20E221K is 14V.

  3. What is the typical application of the ROV20E221K?

    • The ROV20E221K is commonly used for surge protection in power supplies, AC line protection, and general electronic equipment protection.

  4. What is the energy absorption capability of the ROV20E221K?

    • The ROV20E221K has a high energy absorption capability, making it suitable for protecting sensitive electronic components from voltage surges.

  5. How does the ROV20E221K respond to overvoltage conditions?

    • When an overvoltage condition occurs, the ROV20E221K conducts current to divert the excess energy away from the protected circuit, thereby limiting the voltage across the circuit.

  6. Is the ROV20E221K suitable for use in automotive applications?

    • Yes, the ROV20E221K is suitable for use in automotive electronics to protect against voltage transients and surges.

  7. Can the ROV20E221K be used in outdoor applications?

    • Yes, the ROV20E221K is designed to withstand outdoor environments and can be used in outdoor applications where surge protection is required.

  8. What are the temperature specifications for the ROV20E221K?

    • The ROV20E221K has a wide operating temperature range, typically from -40°C to 85°C, making it suitable for various environmental conditions.

  9. Does the ROV20E221K require any additional heat sinking or cooling?

    • In most cases, the ROV20E221K does not require additional heat sinking or cooling due to its low power dissipation under normal operating conditions.

  10. Are there any specific soldering or mounting considerations for the ROV20E221K?

    • The ROV20E221K can be soldered using standard surface mount technology (SMT) processes, and it is important to follow the manufacturer's recommended guidelines for proper mounting and soldering techniques.