SMCJ78 - Product Overview and Specifications

Introduction

The SMCJ78 belongs to the category of transient voltage suppressor diodes, commonly used for surge protection in electronic circuits. This entry provides a comprehensive overview of the SMCJ78, including its basic information, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.

Basic Information Overview

• Category: Transient Voltage Suppressor Diode
• Use: Surge protection in electronic circuits
• Characteristics: Fast response time, high surge capability, low clamping voltage
• Package: SMC (DO-214AB) package
• Essence: Silicon junction diode
• Packaging/Quantity: Available in tape and reel packaging, quantity varies by supplier

Specifications

• Peak Power Dissipation: 1500W
• Breakdown Voltage Range: 6.4V to 88.1V
• Operating Temperature Range: -55°C to +150°C
• Storage Temperature Range: -55°C to +175°C
• Forward Voltage Drop: 3.5V at 50A
• Reverse Leakage Current: 1μA at 78V

Detailed Pin Configuration

The SMCJ78 diode has a standard SMC (DO-214AB) package with two pins. The anode is connected to the positive terminal, while the cathode is connected to the negative terminal.

Functional Features

• Transient Voltage Suppression: Protects against voltage transients and surges
• Fast Response Time: Rapid reaction to overvoltage conditions
• High Surge Capability: Can handle large surge currents without damage
• Low Clamping Voltage: Limits the voltage across the protected circuit

Advantages and Disadvantages

Advantages

• Effective surge protection
• Fast response time
• High surge capability

Disadvantages

• Higher forward voltage drop compared to some alternatives
• Limited breakdown voltage range

Working Principles

When a voltage transient occurs, the SMCJ78 conducts current to divert the excess energy away from the protected circuit, thereby limiting the voltage across it. This rapid response helps prevent damage to sensitive electronic components.

Detailed Application Field Plans

The SMCJ78 is widely used in various applications, including: - Power supplies - Telecommunication equipment - Automotive electronics - Industrial control systems - Consumer electronics

Detailed and Complete Alternative Models

Several alternative models to the SMCJ78 include: - SMCJ6.5A - SMCJ10A - SMCJ24A - SMCJ48A - SMCJ78CA

In conclusion, the SMCJ78 transient voltage suppressor diode offers effective surge protection with its fast response time and high surge capability. While it has limitations such as a higher forward voltage drop and a limited breakdown voltage range, it remains a popular choice for surge protection in various electronic applications.

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