SMBJ440A - Product Overview

Introduction

The SMBJ440A is a diode belonging to the category of transient voltage suppressor (TVS) diodes. These diodes are widely used for protecting sensitive electronic components from voltage spikes and transients. The SMBJ440A offers unique characteristics, packaging, and specifications that make it suitable for various applications.

Basic Information Overview

• Category: Transient Voltage Suppressor (TVS) Diode
• Use: Protection against voltage spikes and transients
• Characteristics: Fast response time, low clamping voltage, high surge capability
• Package: SMB (DO-214AA)
• Essence: Safeguarding electronic circuits from voltage surges
• Packaging/Quantity: Available in tape and reel packaging, quantity varies by manufacturer

Specifications

• Voltage Rating: 440V
• Power Dissipation: 600W
• Breakdown Voltage: 488V
• Operating Temperature Range: -55°C to 150°C
• Storage Temperature Range: -55°C to 175°C

Detailed Pin Configuration

The SMBJ440A typically has two pins, with the anode connected to one pin and the cathode connected to the other. The pinout configuration follows the standard for SMB package diodes.

Functional Features

• Transient Voltage Suppression: Rapidly clamps transient voltages to protect downstream components.
• Low Clamping Voltage: Ensures minimal impact on the protected circuit during clamping.
• Fast Response Time: Reacts quickly to voltage transients, providing swift protection.

Advantages and Disadvantages

Advantages

• Effective protection against voltage spikes
• Fast response time
• Compact SMB package for space-constrained applications

Disadvantages

• Limited power dissipation capability compared to larger TVS diodes
• Higher clamping voltage compared to some specialized TVS diodes

Working Principles

The SMBJ440A operates based on the principle of avalanche breakdown. When a voltage spike occurs, the diode rapidly conducts, diverting excess current away from the protected circuit. This action prevents the voltage from reaching damaging levels.

Detailed Application Field Plans

The SMBJ440A finds extensive use in various applications, including: - Telecommunications: Protecting communication equipment from lightning-induced surges. - Automotive Electronics: Safeguarding sensitive automotive electronics from voltage transients. - Industrial Control Systems: Shielding control systems from electrical disturbances.

Detailed and Complete Alternative Models

• SMBJ5.0A: Lower voltage rating, suitable for less demanding applications.
• SMBJ170A: Higher voltage rating, ideal for applications with higher voltage requirements.
• SMBJ440CA: Similar voltage rating with tighter tolerance, suitable for precision applications.

In conclusion, the SMBJ440A transient voltage suppressor diode offers effective protection against voltage spikes and transients, making it a crucial component in various electronic systems.

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