SA18A Product Overview

Product Category

SA18A belongs to the category of semiconductor devices, specifically as a diode.

Basic Information Overview

• Use: SA18A is used as a transient voltage suppressor (TVS) diode to protect sensitive electronics from voltage spikes and surges.
• Characteristics: It has a low clamping voltage, fast response time, and high surge capability.
• Package: The SA18A is available in a DO-15 package.
• Essence: Its essence lies in providing reliable overvoltage protection for electronic circuits.
• Packaging/Quantity: Typically packaged in reels or tubes, with quantities varying based on manufacturer specifications.

Specifications

• Peak Pulse Power: 500W
• Breakdown Voltage: 18V
• Operating Temperature Range: -55°C to +150°C
• Storage Temperature Range: -55°C to +150°C

Detailed Pin Configuration

The SA18A TVS diode has two pins, anode, and cathode. The anode is connected to the positive side of the circuit, while the cathode is connected to the ground or negative side.

Functional Features

• Transient Suppression: Effectively clamps transient overvoltages to a safe level, protecting downstream components.
• Fast Response Time: Rapid reaction to voltage spikes ensures minimal impact on the protected circuitry.
• High Surge Capability: Capable of withstanding large surge currents without degradation.

Advantages and Disadvantages

• Advantages:
  • Effective protection against voltage transients.
  • Fast response time.
  • Compact size and easy integration into circuit designs.
• Disadvantages:
  • Limited to specific voltage ratings.
  • May require additional components for comprehensive surge protection.

Working Principles

When a voltage spike occurs, the SA18A TVS diode conducts current, diverting the excess energy away from the protected circuit. This action limits the voltage across the circuit, preventing damage to sensitive components.

Detailed Application Field Plans

The SA18A is commonly used in various applications, including: - Consumer Electronics: Protecting sensitive components in smartphones, tablets, and laptops. - Automotive Electronics: Safeguarding control units, sensors, and entertainment systems from voltage surges. - Industrial Equipment: Ensuring the reliability of PLCs, motor drives, and instrumentation.

Detailed and Complete Alternative Models

• SA5.0A: 5.0V breakdown voltage TVS diode.
• SA24A: 24V breakdown voltage TVS diode.
• SA36A: 36V breakdown voltage TVS diode.

In conclusion, the SA18A TVS diode offers effective transient voltage suppression, fast response times, and high surge capability, making it a valuable component in safeguarding electronic circuits from overvoltage events.

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