SMBJ78 Product Overview

Introduction

The SMBJ78 belongs to the category of transient voltage suppressor (TVS) diodes, which are widely used in electronic circuits to protect sensitive components from voltage spikes and transients. This entry provides a comprehensive overview of the SMBJ78, 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 (TVS) Diode
• Use: Protecting sensitive electronic components from voltage spikes and transients
• Characteristics: Fast response time, low clamping voltage, high surge current capability
• Package: SMB (DO-214AA)
• Essence: TVS diode for overvoltage protection
• Packaging/Quantity: Available in tape and reel packaging, quantity varies by manufacturer

Specifications

• Part Number: SMBJ78
• Standoff Voltage: 78V
• Breakdown Voltage: 86.7V
• Peak Pulse Power: 600W
• Operating Temperature Range: -55°C to 150°C
• Compliance: RoHS compliant

Detailed Pin Configuration

The SMBJ78 TVS diode typically has two pins: 1. Anode (A) 2. Cathode (K)

Functional Features

• Transient Voltage Suppression: Quickly clamps excessive voltage to a safe level
• Fast Response Time: Rapid reaction to voltage transients
• Low Clamping Voltage: Limits the voltage across protected components
• High Surge Current Capability: Ability to handle large transient currents

Advantages and Disadvantages

Advantages

• Effective protection against voltage surges
• Fast response time
• Compact size
• RoHS compliant

Disadvantages

• Limited power dissipation capability
• May require additional circuitry for comprehensive protection

Working Principles

When a voltage spike or transient occurs, the SMBJ78 TVS diode conducts heavily, diverting the excess current away from the protected components. This action limits the voltage across the components, preventing damage due to overvoltage conditions.

Detailed Application Field Plans

The SMBJ78 is commonly used in various applications, including: - Power supply units - Communication equipment - Automotive electronics - Industrial control systems - Consumer electronics

Detailed and Complete Alternative Models

Some alternative TVS diode models similar to the SMBJ78 include: - SMAJ78A: Standoff Voltage 78V, Peak Pulse Power 400W - SMCJ78CA: Standoff Voltage 78V, Peak Pulse Power 1500W - P6SMBJ78CA: Standoff Voltage 78V, Peak Pulse Power 600W

In conclusion, the SMBJ78 TVS diode offers effective transient voltage suppression and finds widespread use in diverse electronic applications.

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