SMBJ78A-E3/5B

Product Overview

The SMBJ78A-E3/5B belongs to the category of transient voltage suppressor diodes (TVS diodes) and is commonly used for surge protection in electronic circuits. These diodes are characterized by their ability to rapidly clamp transient voltages to a safe level, thereby protecting sensitive components from damage. The SMBJ78A-E3/5B is available in a compact package, making it suitable for various applications where space is limited. It is an essential component in electronic devices and systems that require reliable surge protection.

Basic Information

• Category: Transient Voltage Suppressor Diode
• Use: Surge Protection in Electronic Circuits
• Characteristics: Rapid Clamping of Transient Voltages, Compact Package
• Package: SMB (DO-214AA)
• Essence: Protecting Sensitive Components from Voltage Surges
• Packaging/Quantity: Tape & Reel, 3000 units per reel

Specifications

• Voltage - Reverse Standoff (Typ): 78V
• Power (Watts): 600W
• Polarity: Unidirectional
• Breakdown Voltage: 86.7V
• Clamping Voltage: 135V
• Peak Pulse Current: 19.4A
• Operating Temperature Range: -55°C to +150°C

Detailed Pin Configuration

The SMBJ78A-E3/5B TVS diode has a standard pin configuration with two leads for easy integration into circuit boards. The pinout configuration is as follows: - Pin 1: Anode - Pin 2: Cathode

Functional Features

• Rapid clamping of transient voltages
• Low clamping voltage
• High peak pulse current capability
• Fast response time

Advantages and Disadvantages

Advantages

• Effective surge protection
• Compact size for space-constrained applications
• High peak pulse current handling capability

Disadvantages

• Unidirectional protection only
• Limited breakdown voltage compared to some higher-rated TVS diodes

Working Principles

The SMBJ78A-E3/5B operates based on the principle of avalanche breakdown. When a transient voltage spike occurs, the diode rapidly conducts, diverting the excess energy away from the protected circuit. This action effectively limits the voltage across the circuit, preventing damage to sensitive components.

Detailed Application Field Plans

The SMBJ78A-E3/5B is widely used in various electronic systems and devices, including: - Power supplies - Communication equipment - Industrial control systems - Automotive electronics - Consumer electronics

Detailed and Complete Alternative Models

• SMBJ78CA: Similar specifications with a higher breakdown voltage of 85.5V
• SMBJ78AHE3/52: Higher power rating of 1500W for more demanding applications
• SMBJ78A-E3/52G: Green alternative with lead-free finish for environmental compliance

In conclusion, the SMBJ78A-E3/5B transient voltage suppressor diode offers effective surge protection in a compact package, making it an essential component in various electronic applications.

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