SMAJ78AHE3/5A

Product Overview

Category

The SMAJ78AHE3/5A belongs to the category of electronic components, specifically within the realm of semiconductor devices.

Use

This product is primarily used for transient voltage suppression in electronic circuits to protect sensitive components from voltage spikes and surges.

Characteristics

• Voltage Suppression: Capable of suppressing transient voltages to protect downstream components.
• Fast Response Time: Rapid response to voltage transients to minimize potential damage.
• Compact Package: Small form factor for easy integration into circuit designs.
• Robustness: Designed to withstand high-energy transients without degradation.

Package

The SMAJ78AHE3/5A is typically available in a surface-mount package, which facilitates easy assembly onto printed circuit boards (PCBs).

Essence

The essence of this product lies in its ability to safeguard electronic circuits from voltage fluctuations, ensuring reliable operation and longevity of electronic devices.

Packaging/Quantity

The SMAJ78AHE3/5A is commonly packaged in reels or tape and reel format, with quantities varying based on manufacturer specifications.

Specifications

• Part Number: SMAJ78AHE3/5A
• Peak Pulse Power: 400W
• Breakdown Voltage: 78V
• Operating Temperature Range: -55°C to +150°C
• Reverse Standoff Voltage: 78V
• Clamping Voltage: 126V
• Package Type: DO-214AC (SMA)

Detailed Pin Configuration

The SMAJ78AHE3/5A features a standard DO-214AC (SMA) package with two pins. Pin 1 is the cathode, while pin 2 is the anode.

Functional Features

• Transient Voltage Suppression: Effectively clamps transient voltages to protect connected circuits.
• Low Clamping Voltage: Ensures that the protected circuitry is exposed to minimal voltage during transient events.
• Fast Response Time: Rapid reaction to voltage spikes, minimizing the risk of damage to sensitive components.

Advantages and Disadvantages

Advantages

• Effective protection against voltage transients.
• Compact form factor for easy integration.
• Fast response time to transient events.

Disadvantages

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

Working Principles

The SMAJ78AHE3/5A operates based on the principle of avalanche breakdown, where it rapidly conducts excess current when the voltage exceeds the breakdown voltage, thereby diverting the transient energy away from the protected circuit.

Detailed Application Field Plans

The SMAJ78AHE3/5A finds extensive use in various applications, including: - Telecommunications: Protecting sensitive communication equipment from power surges. - Consumer Electronics: Safeguarding electronic devices such as TVs, computers, and home appliances. - Automotive Electronics: Providing surge protection in vehicle electronics systems.

Detailed and Complete Alternative Models

• Alternative Model 1: SMBJ78AHE3/5A
  • Similar specifications but in a different package (SMB).
• Alternative Model 2: P6SMB78A
  • Higher peak pulse power rating for more demanding applications.
• Alternative Model 3: SMCJ78A
  • Larger package size for enhanced thermal performance.

In conclusion, the SMAJ78AHE3/5A serves as a crucial component in protecting electronic circuits from transient voltage events, offering a balance of compactness, efficiency, and reliability.

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