STMicroelectronics
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SM6T18AY
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SM6T18AY

Product Overview

Category: TVS Diode
Use: Protection against transient voltage spikes
Characteristics: Low clamping voltage, fast response time
Package: SMC (DO-214AB)
Essence: Transient voltage suppressor diode
Packaging/Quantity: Tape & Reel, 3000 units per reel

Specifications

  • Voltage - Reverse Standoff (Typ): 15.3V
  • Voltage - Breakdown (Min): 17V
  • Voltage - Clamping (Max) @ Ipp: 26V
  • Current - Peak Pulse (10/1000µs): 11.4A
  • Power - Peak Pulse: 600W
  • Type: Zener
  • Unidirectional: Yes

Detailed Pin Configuration

The SM6T18AY TVS diode has two pins, with the cathode connected to the ground and the anode connected to the protected line.

Functional Features

  • Transient Voltage Suppression: Protects sensitive electronic components from voltage transients.
  • Fast Response Time: Quickly clamps transient voltages to a safe level.
  • Low Clamping Voltage: Provides effective protection without affecting normal operation.

Advantages and Disadvantages

Advantages: 1. Effective protection against transient voltage spikes. 2. Fast response time ensures minimal impact on the protected circuit. 3. Low clamping voltage helps in preserving the integrity of sensitive components.

Disadvantages: 1. May require additional circuitry for comprehensive surge protection. 2. Limited to unidirectional protection.

Working Principles

The SM6T18AY operates by diverting excessive voltage away from sensitive components when a transient voltage spike occurs. It achieves this by rapidly switching into a low-impedance state, effectively shunting the excess current to protect the downstream circuitry.

Detailed Application Field Plans

The SM6T18AY is commonly used in various applications including: - Telecommunication Equipment: Protects sensitive communication circuits from lightning-induced surges. - Automotive Electronics: Safeguards vehicle electronics from voltage transients caused by load dump or jump starts. - Industrial Control Systems: Shields control systems from voltage spikes induced by inductive loads.

Detailed and Complete Alternative Models

  1. SM6T15A: Lower reverse standoff voltage of 13.3V.
  2. SM6T20A: Higher reverse standoff voltage of 17.8V.
  3. SM6T24A: Higher clamping voltage of 29.2V.

In conclusion, the SM6T18AY TVS diode offers effective protection against transient voltage spikes with its low clamping voltage and fast response time. While it may have some limitations, its application versatility and availability of alternative models make it a valuable component in various electronic systems.

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แสดงรายการคำถามและคำตอบทั่วไป 10 ข้อที่เกี่ยวข้องกับการใช้ SM6T18AY ในโซลูชันทางเทคนิค

  1. What is the maximum working voltage of SM6T18AY?

    • The maximum working voltage of SM6T18AY is 15.3V.

  2. What is the peak pulse power of SM6T18AY?

    • The peak pulse power of SM6T18AY is 600W.

  3. What is the breakdown voltage of SM6T18AY?

    • The breakdown voltage of SM6T18AY is typically 20V.

  4. What is the clamping voltage of SM6T18AY?

    • The clamping voltage of SM6T18AY is 29.2V at 10A.

  5. What is the forward voltage drop of SM6T18AY?

    • The forward voltage drop of SM6T18AY is typically 0.9V at 10A.

  6. What is the operating temperature range of SM6T18AY?

    • The operating temperature range of SM6T18AY is -55°C to +150°C.

  7. What is the package type of SM6T18AY?

    • SM6T18AY is available in a DO-214AA (SMB) package.

  8. What are the typical applications for SM6T18AY?

    • SM6T18AY is commonly used in transient voltage suppression for electronic equipment, automotive systems, and telecommunications.

  9. What are the key features of SM6T18AY?

    • SM6T18AY offers high surge capability, low clamping voltage, and fast response time.

  10. Is SM6T18AY RoHS compliant?

    • Yes, SM6T18AY is RoHS compliant, making it suitable for use in environmentally sensitive applications.