STMicroelectronics
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SM4T21CAY
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SM4T21CAY

Product Overview

Category: Electronic Component
Use: Transient Voltage Suppressor
Characteristics: High surge capability, low clamping voltage
Package: SMC (DO-214AB)
Essence: Protects electronic circuits from overvoltage transients
Packaging/Quantity: Tape & Reel, 3000 units per reel

Specifications

  • Peak Power Dissipation: 400W
  • Breakdown Voltage Range: 5.8V to 376V
  • Operating Temperature Range: -55°C to +150°C
  • RoHS Compliant: Yes

Detailed Pin Configuration

The SM4T21CAY has two pins, with the anode connected to the positive side and the cathode connected to the negative side.

Functional Features

  • Provides protection against transient voltage events
  • Low clamping voltage ensures minimal stress on protected circuits
  • Fast response time for effective transient suppression

Advantages

  • High surge capability for robust protection
  • Wide breakdown voltage range for versatile applications
  • RoHS compliant for environmental sustainability

Disadvantages

  • SMC package may require additional space compared to smaller packages
  • Limited to unidirectional transient voltage suppression

Working Principles

The SM4T21CAY operates by diverting excessive transient current away from sensitive electronic components, thereby safeguarding them from damage due to voltage spikes or surges.

Detailed Application Field Plans

  1. Telecommunications: Protects communication equipment from lightning-induced surges.
  2. Automotive Electronics: Safeguards vehicle electronics from voltage transients.
  3. Industrial Control Systems: Ensures reliability of control circuitry in industrial environments.

Detailed and Complete Alternative Models

  1. SM4T18CAY: Similar characteristics with a lower breakdown voltage range.
  2. SM4T24CAY: Higher breakdown voltage range for increased protection.

This comprehensive entry provides a detailed understanding of the SM4T21CAY, including its specifications, functional features, advantages, disadvantages, working principles, application field plans, and alternative models.

Word Count: 270

Перелічіть 10 типових запитань і відповідей, пов’язаних із застосуванням SM4T21CAY у технічних рішеннях

  1. What is SM4T21CAY?

    • SM4T21CAY is a transient voltage suppressor diode designed to protect sensitive electronics from voltage transients induced by lightning, inductive load switching, and electrostatic discharge.

  2. What is the maximum peak pulse power of SM4T21CAY?

    • The maximum peak pulse power of SM4T21CAY is 400 watts for an 8/20 µs waveform.

  3. What is the breakdown voltage of SM4T21CAY?

    • The breakdown voltage of SM4T21CAY is 21 volts.

  4. What are the typical applications of SM4T21CAY?

    • SM4T21CAY is commonly used in telecommunications equipment, industrial controls, consumer electronics, and automotive electronics to protect against voltage surges.

  5. What is the operating temperature range of SM4T21CAY?

    • The operating temperature range of SM4T21CAY is -55°C to +150°C.

  6. What is the reverse stand-off voltage of SM4T21CAY?

    • The reverse stand-off voltage of SM4T21CAY is 17.8 volts.

  7. Does SM4T21CAY meet industry standards for surge protection?

    • Yes, SM4T21CAY meets the requirements of IEC 61000-4-5 for surge protection.

  8. Can SM4T21CAY be used in high-speed data line protection?

    • Yes, SM4T21CAY is suitable for protecting high-speed data lines such as USB, Ethernet, and HDMI interfaces.

  9. What is the response time of SM4T21CAY?

    • The response time of SM4T21CAY is less than 1 picosecond.

  10. Is SM4T21CAY RoHS compliant?

    • Yes, SM4T21CAY is compliant with the Restriction of Hazardous Substances (RoHS) directive.