TPSMB18A - Product Encyclopedia Entry

Introduction

The TPSMB18A is a transient voltage suppressor diode designed to protect sensitive electronic equipment from voltage transients induced by lightning, electrostatic discharge (ESD), and other transient voltage events. This entry provides an in-depth overview of the TPSMB18A, including its product category, basic information, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.

Product Category

The TPSMB18A belongs to the category of transient voltage suppressor diodes, which are widely used in electronic circuits to protect semiconductor devices from voltage spikes and surges.

Basic Information Overview

• Use: The TPSMB18A is used to protect electronic circuits from transient voltage events.
• Characteristics: It offers low clamping voltage, fast response time, and high surge current capability.
• Package: The TPSMB18A is available in a DO-214AA (SMB) package.
• Essence: Its essence lies in providing robust protection against transient voltage events.
• Packaging/Quantity: It is typically packaged in reels or tubes, with varying quantities based on customer requirements.

Specifications

• Peak Power Dissipation: 1500W
• Breakdown Voltage: 18V
• Clamping Voltage: 29.2V at 10A
• Operating Temperature Range: -55°C to 150°C
• Storage Temperature Range: -55°C to 175°C

Detailed Pin Configuration

The TPSMB18A has a standard SMB package with two pins. Pin 1 is the cathode, and pin 2 is the anode.

Functional Features

• Transient Voltage Suppression: Effectively clamps transient voltages to safe levels.
• Fast Response Time: Rapidly responds to transient events, protecting downstream components.
• Low Clamping Voltage: Provides efficient protection without introducing excessive voltage drop.

Advantages and Disadvantages

Advantages

• Robust transient voltage protection
• Fast response time
• Low clamping voltage
• High surge current capability

Disadvantages

• Limited breakdown voltage range
• Sensitive to reverse over-voltage conditions

Working Principles

The TPSMB18A operates by diverting excess transient current away from sensitive circuit elements, thereby limiting the voltage across them. When a transient event occurs, the diode rapidly switches into its low-impedance state, shunting the excess energy to ground and preventing damage to downstream components.

Detailed Application Field Plans

The TPSMB18A finds extensive use in various applications, including: - Telecommunication Equipment: Protects sensitive communication circuits from lightning-induced surges. - Industrial Control Systems: Safeguards control electronics from ESD and power line transients. - Automotive Electronics: Provides surge protection for vehicle electronic systems.

Detailed and Complete Alternative Models

• TPSMB15A: Similar characteristics with a lower breakdown voltage of 15V.
• TPSMB22A: Higher breakdown voltage of 22V with comparable performance characteristics.
• TPSMB18CA: Bi-directional transient voltage suppressor with a breakdown voltage of 18V.

In conclusion, the TPSMB18A transient voltage suppressor diode offers robust protection against transient voltage events, making it an essential component in various electronic systems. Its fast response time, low clamping voltage, and high surge current capability make it a preferred choice for designers seeking reliable transient voltage protection.

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