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SMBJ18A
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SMBJ18A - Product Overview and Specifications

Introduction

The SMBJ18A is a diode belonging to the category of transient voltage suppressor (TVS) diodes. These diodes are commonly used to protect sensitive electronic components from voltage spikes and transients. The SMBJ18A is specifically designed to provide protection for electronic circuits against voltage surges caused by lightning, inductive load switching, and electrostatic discharge.

Basic Information Overview

  • Category: Transient Voltage Suppressor (TVS) Diode
  • Use: Protection against voltage spikes and transients
  • Characteristics: Fast response time, low clamping voltage, high surge current capability
  • Package: SMB (DO-214AA)
  • Essence: Safeguarding electronic circuits from voltage surges
  • Packaging/Quantity: Available in tape and reel packaging, quantity varies by manufacturer

Specifications

  • Part Number: SMBJ18A
  • Peak Pulse Power: 600W
  • Breakdown Voltage: 18V
  • Operating Voltage: 15.3V
  • Clamping Voltage: 24.4V
  • Peak Pulse Current: 34.5A
  • Reverse Standoff Voltage: 18V
  • Operating Temperature Range: -55°C to +150°C

Detailed Pin Configuration

The SMBJ18A TVS diode typically has two pins, anode, and cathode. The anode is connected to the circuit node that requires protection, while the cathode is connected to the ground or reference potential.

Functional Features

  • Fast response time to clamp transient voltages
  • Low clamping voltage to limit the voltage across the protected circuit
  • High surge current capability to withstand large transient currents
  • Robust construction for reliability in harsh environments

Advantages and Disadvantages

Advantages

  • Effective protection against voltage surges and transients
  • Fast response time ensures minimal impact on the protected circuit
  • Compact size for easy integration into circuit designs

Disadvantages

  • Clamping voltage may still allow some voltage to pass through, albeit at a reduced level
  • Limited to specific voltage ranges, may require multiple diodes for broader protection coverage

Working Principles

The SMBJ18A TVS diode works by quickly diverting excess transient voltage away from the protected circuit, thereby limiting the voltage across the circuit. When a voltage surge occurs, the diode rapidly switches into its low impedance state, providing a path for the excess current to flow to the ground or reference potential.

Detailed Application Field Plans

The SMBJ18A TVS diode finds extensive use in various electronic systems, including: - Power supply units - Communication equipment - Automotive electronics - Industrial control systems - Consumer electronics

Detailed and Complete Alternative Models

  • SMBJ10A: Breakdown Voltage 10V
  • SMBJ15A: Breakdown Voltage 15V
  • SMBJ20A: Breakdown Voltage 20V
  • SMBJ24A: Breakdown Voltage 24V
  • SMBJ30A: Breakdown Voltage 30V

In conclusion, the SMBJ18A TVS diode offers effective protection against voltage surges and transients, making it an essential component in safeguarding sensitive electronic circuits.

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تکنیکی حل میں SMBJ18A کے اطلاق سے متعلق 10 عام سوالات اور جوابات کی فہرست بنائیں

  1. What is the SMBJ18A used for?

    • The SMBJ18A is a transient voltage suppressor diode designed to protect sensitive electronic components from voltage spikes and transients.

  2. What is the maximum voltage rating of the SMBJ18A?

    • The SMBJ18A has a maximum voltage rating of 18 volts.

  3. What is the peak pulse power dissipation of the SMBJ18A?

    • The peak pulse power dissipation of the SMBJ18A is typically 600 watts.

  4. What are the typical applications of the SMBJ18A?

    • The SMBJ18A is commonly used in applications such as telecommunications equipment, industrial automation, and automotive electronics to protect against voltage surges.

  5. What is the response time of the SMBJ18A to a transient event?

    • The response time of the SMBJ18A to a transient event is very fast, typically in the nanosecond range.

  6. Does the SMBJ18A require any external components for proper operation?

    • No, the SMBJ18A does not require any external components for its basic operation.

  7. What is the operating temperature range of the SMBJ18A?

    • The SMBJ18A is designed to operate within a temperature range of -55°C to 150°C.

  8. Can the SMBJ18A be used in high-frequency applications?

    • Yes, the SMBJ18A can be used in high-frequency applications due to its fast response time and low capacitance.

  9. Is the SMBJ18A RoHS compliant?

    • Yes, the SMBJ18A is RoHS compliant, making it suitable for use in environmentally conscious designs.

  10. What are the packaging options available for the SMBJ18A?

    • The SMBJ18A is available in various package types, including DO-214AA (SMB) and DO-214AB (SMC), providing flexibility for different design requirements.