SMA5J18HE3/5A

Product Overview

Category

The SMA5J18HE3/5A belongs to the category of semiconductor devices, specifically a type of TVS (transient voltage suppressor) diode.

Use

It is used for protecting sensitive electronic components from voltage transients induced by lightning, ESD (electrostatic discharge), and other transient voltage events.

Characteristics

• Voltage Suppression: Capable of suppressing high voltage transients.
• Fast Response Time: Provides quick response to transient voltage events.
• Low Clamping Voltage: Limits the voltage across the protected circuitry.
• Compact Package: Small form factor suitable for various applications.

Package

The SMA5J18HE3/5A is typically available in a surface-mount package, such as SMA (DO-214AC), and is compatible with automated assembly processes.

Essence

The essence of SMA5J18HE3/5A lies in its ability to safeguard electronic circuits from damaging voltage spikes and surges.

Packaging/Quantity

It is commonly supplied in reels or tape and reel packaging, with quantities varying based on manufacturer specifications.

Specifications

• Standoff Voltage: 18V
• Peak Pulse Power: 5A
• Breakdown Voltage: 20.2V
• Operating Temperature Range: -55°C to +150°C
• Package Type: SMA (DO-214AC)

Detailed Pin Configuration

The SMA5J18HE3/5A typically has two pins, with the anode and cathode connections clearly marked on the device's package.

Functional Features

• Transient Voltage Suppression: Provides protection against voltage transients.
• Bidirectional Protection: Offers protection for both positive and negative voltage transients.
• Low Clamping Voltage: Limits the voltage across the protected circuitry to prevent damage.

Advantages and Disadvantages

Advantages

• Effective protection against voltage transients
• Fast response time
• Compact and easy to integrate into circuit designs

Disadvantages

• Limited to specific voltage ratings
• May require additional components for comprehensive surge protection

Working Principles

The SMA5J18HE3/5A operates based on the principle of avalanche breakdown, where it rapidly conducts excess current when the voltage exceeds the breakdown voltage, diverting the transient energy away from the protected circuitry.

Detailed Application Field Plans

The SMA5J18HE3/5A is commonly used in various electronic systems, including: - Power supplies - Communication equipment - Industrial control systems - Automotive electronics - Consumer electronics

Detailed and Complete Alternative Models

• Alternative Model 1: SMA6J18HE3/5A
  • Similar specifications and package type
• Alternative Model 2: SMBJ18CA
  • Different package type (SMB) but similar voltage suppression characteristics
• Alternative Model 3: P6KE18CA
  • Axial leaded package with comparable voltage suppression capabilities

In conclusion, the SMA5J18HE3/5A is a vital component in protecting electronic circuits from transient voltage events, offering fast response and effective voltage suppression. Its compact size and bidirectional protection make it suitable for a wide range of applications in various industries.

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