SMCJ78A-HRA English Editing Encyclopedia Entry

Product Overview

The SMCJ78A-HRA belongs to the category of transient voltage suppressor diodes. These diodes are commonly used to protect sensitive electronic components from voltage spikes and transients. The SMCJ78A-HRA is designed to provide robust protection against voltage surges in various electronic circuits.

Basic Information Overview

• Category: Transient Voltage Suppressor Diode
• Use: Protection against voltage spikes and transients
• Characteristics: High reliability, fast response time, low clamping voltage
• Package: SMA (DO-214AC)
• Essence: Safeguarding electronic components from voltage surges
• Packaging/Quantity: Available in reels or bulk packaging, quantity varies by manufacturer

Specifications

• Peak Power Dissipation: 1500W
• Breakdown Voltage: 78V
• Operating Temperature Range: -55°C to +175°C
• Forward Voltage Drop: 3.5V at 10A
• Reverse Standoff Voltage: 78V

Detailed Pin Configuration

The SMCJ78A-HRA typically has two pins, with the anode connected to the positive side and the cathode connected to the negative side of the circuit. The pin configuration is as follows: - Anode (A) - Pin 1 - Cathode (K) - Pin 2

Functional Features

• Transient Voltage Suppression: Provides rapid clamping of voltage spikes to protect downstream components.
• Low Clamping Voltage: Ensures that the protected circuit is exposed to minimal voltage during a surge event.
• Fast Response Time: Reacts quickly to transient events, minimizing the risk of damage to sensitive electronics.

Advantages and Disadvantages

Advantages

• Effective protection against voltage surges
• Fast response time
• Low clamping voltage

Disadvantages

• Can degrade over time with repeated exposure to high voltage transients
• May require replacement after significant surge events

Working Principles

The SMCJ78A-HRA operates based on the principle of avalanche breakdown. When a voltage surge occurs, the diode rapidly conducts, diverting excess current away from the protected circuit. This action effectively limits the voltage across the circuit, preventing damage to sensitive components.

Detailed Application Field Plans

The SMCJ78A-HRA is widely used in various applications, including: - Power supply units - Communication equipment - Automotive electronics - Industrial control systems - Consumer electronics

Detailed and Complete Alternative Models

Several alternative models to the SMCJ78A-HRA include: - P6SMB78CA: Similar specifications and package type - 1.5SMC78CA: Higher peak power dissipation - SA78CA: Lower profile package for space-constrained applications

In conclusion, the SMCJ78A-HRA transient voltage suppressor diode offers reliable protection against voltage surges and transients, making it an essential component in safeguarding sensitive electronic circuits across various industries.

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