SMAJ4738AE3/TR13

Product Overview

Category

The SMAJ4738AE3/TR13 belongs to the category of TVS (Transient Voltage Suppressor) diodes.

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: Provides protection against voltage spikes and surges.
• Fast Response Time: Rapidly clamps transient voltages to a safe level.
• Low Leakage Current: Ensures minimal power dissipation during normal operation.
• Compact Package: Small form factor for space-constrained applications.

Package

The SMAJ4738AE3/TR13 is typically available in a surface-mount package, such as SMB (DO-214AA), with tape and reel packaging.

Essence

The essence of the SMAJ4738AE3/TR13 lies in its ability to safeguard electronic circuits from voltage transients, thereby enhancing the reliability and longevity of electronic devices.

Packaging/Quantity

It is commonly supplied in reels containing a specific quantity, such as 3000 units per reel.

Specifications

• Standoff Voltage: 38V
• Peak Pulse Power: 400W
• Breakdown Voltage: 42.1V
• Maximum Clamping Voltage: 61.4V
• Operating Temperature Range: -55°C to 150°C

Detailed Pin Configuration

The SMAJ4738AE3/TR13 typically features two pins for connection, with the pinout configuration as follows: - Pin 1: Anode - Pin 2: Cathode

Functional Features

• Transient Voltage Suppression: Quickly diverts excessive voltage away from sensitive components.
• Low Clamping Voltage: Limits the voltage across the protected circuitry.
• Bidirectional Protection: Guards against both positive and negative transient events.

Advantages and Disadvantages

Advantages

• Effective protection against voltage transients
• Fast response time
• Compact and space-saving design

Disadvantages

• Limited to specific voltage ratings
• Requires careful consideration of placement for optimal performance

Working Principles

When a transient voltage event occurs, the SMAJ4738AE3/TR13 conducts current to divert 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 SMAJ4738AE3/TR13 finds application in various fields, including: - Telecommunications: Protecting communication equipment from lightning-induced surges. - Consumer Electronics: Safeguarding sensitive ICs in electronic devices from ESD events. - Automotive: Providing surge protection for automotive electronics.

Detailed and Complete Alternative Models

Some alternative models to the SMAJ4738AE3/TR13 include: - SMAJ5.0A: Standoff Voltage 5.0V, Peak Pulse Power 400W - SMAJ12A: Standoff Voltage 12V, Peak Pulse Power 400W - SMAJ24A: Standoff Voltage 24V, Peak Pulse Power 400W

In conclusion, the SMAJ4738AE3/TR13 is a vital component in safeguarding electronic circuits from transient voltage events, offering effective protection and fast response times in a compact package.

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