Littelfuse Inc.
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TMOV20RP385EL4B1
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TMOV20RP385EL4B1

Product Overview

Category

The TMOV20RP385EL4B1 belongs to the category of surge protective devices (SPDs).

Use

It is used to protect electrical and electronic equipment from transient voltage surges.

Characteristics

  • Voltage Rating: 385VAC
  • Maximum Continuous Operating Voltage: 275VAC
  • Peak Surge Current: 20kA
  • Package: Radial Lead Disc Varistor
  • Essence: Metal Oxide Varistor (MOV) with Thermal Cutoff
  • Packaging/Quantity: Typically packaged in reels or trays, quantity varies based on manufacturer

Specifications

  • Voltage Rating: 385VAC
  • Maximum Continuous Operating Voltage: 275VAC
  • Peak Surge Current: 20kA
  • Response Time: <25ns
  • Operating Temperature: -40°C to +85°C
  • Lead Material: Tin-plated Copper

Detailed Pin Configuration

The TMOV20RP385EL4B1 has a radial lead configuration with two leads for connection to the circuit. The pinout is as follows: - Pin 1: Connection point for one lead - Pin 2: Connection point for the other lead

Functional Features

  • Combines metal oxide varistor (MOV) and thermal cutoff technology for enhanced surge protection
  • Fast response time for rapid clamping of transient voltage spikes
  • Reliable overvoltage protection for sensitive electronic equipment

Advantages and Disadvantages

Advantages

  • High surge current capability
  • Fast response time
  • Compact design
  • Reliable protection for equipment

Disadvantages

  • Limited to specific voltage ratings
  • May require periodic replacement after surge events

Working Principles

The TMOV20RP385EL4B1 operates by utilizing the metal oxide varistor to divert excess voltage away from the protected equipment. In the event of a surge, the varistor quickly conducts, shunting the surge energy to ground. The integrated thermal cutoff provides additional safety by disconnecting the varistor in case of overheating.

Detailed Application Field Plans

The TMOV20RP385EL4B1 is suitable for use in various applications, including: - Industrial control systems - Telecommunications equipment - Power distribution units - Renewable energy systems - Home appliances

Detailed and Complete Alternative Models

Some alternative models to the TMOV20RP385EL4B1 include: - TMOV25RP420E: Higher voltage rating for increased protection - TMOV14RP130M: Lower voltage rating for specific applications - TMOV34RP500E: Higher surge current capability for heavy-duty equipment

This completes the entry for TMOV20RP385EL4B1, providing comprehensive information about its product details, features, and applications.

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Перечислите 10 распространенных вопросов и ответов, связанных с применением TMOV20RP385EL4B1 в технических решениях.

  1. What is the TMOV20RP385EL4B1?

    • The TMOV20RP385EL4B1 is a type of metal oxide varistor (MOV) component designed to protect electrical and electronic circuits from overvoltage transients.

  2. What are the key specifications of the TMOV20RP385EL4B1?

    • The TMOV20RP385EL4B1 has a maximum voltage rating of 385VAC, a maximum surge current capability of 20kA, and an energy absorption capacity of 360J.

  3. How does the TMOV20RP385EL4B1 function in a circuit?

    • When an overvoltage transient occurs, the TMOV20RP385EL4B1 clamps the voltage to a safe level by diverting excess current away from sensitive components, thereby protecting the circuit.

  4. Where can the TMOV20RP385EL4B1 be used in technical solutions?

    • The TMOV20RP385EL4B1 is commonly used in power supplies, motor drives, industrial equipment, and other applications where protection against voltage surges is necessary.

  5. What are the advantages of using the TMOV20RP385EL4B1?

    • The TMOV20RP385EL4B1 offers fast response to transient events, high surge current handling capability, and low leakage current, making it an effective solution for overvoltage protection.

  6. How should the TMOV20RP385EL4B1 be installed in a circuit?

    • The TMOV20RP385EL4B1 should be connected in parallel with the load or equipment to be protected, ensuring that it can quickly shunt excess voltage when needed.

  7. What are the typical failure modes of the TMOV20RP385EL4B1?

    • The TMOV20RP385EL4B1 may degrade over time due to repeated exposure to transient events, leading to increased leakage current or reduced clamping performance.

  8. Are there any temperature or environmental considerations for the TMOV20RP385EL4B1?

    • The TMOV20RP385EL4B1 is designed to operate within a specified temperature range and should be protected from excessive humidity or harsh environmental conditions.

  9. Can multiple TMOV20RP385EL4B1 components be used in parallel for enhanced protection?

    • Yes, multiple TMOV20RP385EL4B1 components can be employed in parallel to increase the surge current handling capability and provide redundancy in critical applications.

  10. Where can I find detailed application notes and guidelines for using the TMOV20RP385EL4B1?

    • Application notes and guidelines for the TMOV20RP385EL4B1 can be obtained from the manufacturer's datasheets, technical manuals, or customer support resources.