SMA5J18AHE3/5A

Product Overview

Category

The SMA5J18AHE3/5A 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 to protect downstream components.
• Fast Response Time: Provides rapid response to transient events, minimizing the risk of damage to connected devices.
• Low Clamping Voltage: Ensures that the voltage across the protected device remains within safe limits during transient events.
• Compact Package: The SMA package offers a compact form factor suitable for various electronic applications.

Package

The SMA5J18AHE3/5A is available in a SMA package, which is a surface-mount package with two leads for easy integration onto circuit boards.

Essence

The essence of the SMA5J18AHE3/5A lies in its ability to safeguard electronic circuits and components from potentially damaging voltage transients.

Packaging/Quantity

The SMA5J18AHE3/5A is typically supplied in reels or tubes, with quantities varying based on the manufacturer's specifications.

Specifications

• Standoff Voltage: 18V
• Peak Pulse Power: 5kW
• Breakdown Voltage: 20V
• Operating Temperature Range: -55°C to 150°C
• RoHS Compliant: Yes

Detailed Pin Configuration

The SMA5J18AHE3/5A features a simple two-pin configuration, with one pin designated as the anode and the other as the cathode. The anode is typically marked with a line or other indicator on the body of the diode.

Functional Features

• Transient Voltage Suppression: Rapidly clamps transient voltages to safe levels, protecting downstream components.
• Low Leakage Current: Minimizes power loss and ensures efficient operation during normal conditions.
• High Surge Capability: Capable of withstanding multiple surge events without degradation.

Advantages and Disadvantages

Advantages

• Effective protection against voltage transients
• Fast response time
• Compact form factor for easy integration

Disadvantages

• Limited to low voltage applications
• Requires careful consideration of placement and layout for optimal performance

Working Principles

The SMA5J18AHE3/5A operates based on the principle of avalanche breakdown, where it rapidly conducts current when the voltage across it exceeds the breakdown voltage. This effectively diverts excess energy away from sensitive components, protecting them from damage.

Detailed Application Field Plans

The SMA5J18AHE3/5A is commonly used in various electronic systems, including: - Power supplies - Communication equipment - Industrial control systems - Automotive electronics - Consumer electronics

Detailed and Complete Alternative Models

• SMAJ18A: Similar characteristics and performance in a different package
• P6KE18CA: Axial leaded TVS diode with comparable specifications
• SMBJ18A: Surface-mount TVS diode with similar voltage suppression capabilities

In conclusion, the SMA5J18AHE3/5A serves as a crucial component in protecting electronic circuits from transient voltage events, offering fast response, compact packaging, and reliable performance. Its application spans across various industries, making it an essential part of modern electronic systems.

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