SM8S40A-E3/2D

Introduction

The SM8S40A-E3/2D is a high-performance TVS (transient voltage suppressor) diode designed to protect sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events. This entry provides an overview of the product, including its basic information, specifications, detailed pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.

Basic Information Overview

• Category: TVS Diode
• Use: Protection against voltage transients
• Characteristics: High performance, low clamping voltage, fast response time
• Package: DO-218AB
• Essence: Transient voltage suppression
• Packaging/Quantity: Tape & Reel, 500 units per reel

Specifications

• Standoff Voltage: 36.8V
• Breakdown Voltage: 40.9V
• Peak Pulse Power: 800W
• Clamping Voltage: 58.1V
• Operating Temperature Range: -55°C to 150°C
• Polarity: Unidirectional

Detailed Pin Configuration

The SM8S40A-E3/2D TVS diode has a standard DO-218AB 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: Rapid reaction to transient events ensures minimal impact on protected circuits.
• High Peak Pulse Power: Capable of handling high surge currents without degradation.

Advantages and Disadvantages

Advantages

• Effective protection against voltage transients
• Fast response time
• High peak pulse power handling capability

Disadvantages

• Unidirectional polarity may not be suitable for all applications
• Clamping voltage slightly higher compared to some alternative models

Working Principles

The SM8S40A-E3/2D operates based on the principle of avalanche breakdown. When a transient voltage event occurs, the diode rapidly conducts, diverting the excess energy away from the protected circuit and limiting the voltage to a safe level.

Detailed Application Field Plans

The SM8S40A-E3/2D is commonly used in various electronic systems and equipment requiring protection against voltage transients, including: - Power supplies - Communication equipment - Industrial control systems - Automotive electronics - Consumer electronics

Detailed and Complete Alternative Models

• SM8S36A-E3/2D: Lower standoff voltage variant
• SM8S33A-E3/2D: Higher standoff voltage variant
• SM8S30A-E3/2D: Lower clamping voltage variant

In conclusion, the SM8S40A-E3/2D TVS diode offers effective protection against voltage transients with its high performance, fast response time, and high peak pulse power handling capability. While it has some limitations, such as unidirectional polarity, it remains a reliable choice for various electronic applications.

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