1.5SMC440A-E3/57T Series

series introduction

# Introduction to the 1.5SMC440A - E3/57T Product Series

## 1. Overview
The 1.5SMC440A - E3/57T product series belongs to the realm of semiconductor protection devices, specifically transient voltage suppressor (TVS) diodes. These components are designed to safeguard sensitive electronic circuits from voltage spikes and transient events that can cause irreversible damage to the equipment. With the increasing complexity and sensitivity of modern electronic systems, the need for reliable over - voltage protection has become paramount, and the 1.5SMC440A - E3/57T series offers an effective solution.

## 2. Key Features

### Electrical Characteristics
- **High Surge Capability**: The 1.5SMC440A - E3/57T diodes are capable of handling high surge currents. They can withstand large transient events, typically with a peak pulse power dissipation of 1500 watts. This high surge capacity makes them suitable for use in applications where sudden voltage spikes are common, such as power supplies, automotive electronics, and industrial control systems.
- **Low Clamping Voltage**: When a transient voltage occurs, these TVS diodes quickly switch from a high - impedance state to a low - impedance state. They have a low clamping voltage, which means that they can limit the voltage across the protected circuit to a safe level. This helps to prevent damage to the sensitive components in the circuit by diverting the excess current away from them.
- **Fast Response Time**: One of the critical features of the 1.5SMC440A - E3/57T series is its extremely fast response time. It can respond to transient events in less than 1 nanosecond, ensuring that the protected circuit is shielded from the harmful effects of voltage spikes almost instantaneously.

### Package and Physical Characteristics
- **DO - 214AB Package**: The diodes in this series are housed in a DO - 214AB package, which is a surface - mount package. This package offers several advantages, including ease of assembly on printed circuit boards (PCBs). It also has good thermal performance, allowing the diode to dissipate heat effectively during operation.
- **RoHS Compliance**: The 1.5SMC440A - E3/57T series is compliant with the Restriction of Hazardous Substances (RoHS) directive. This means that the products are free from hazardous substances such as lead, mercury, cadmium, and certain flame retardants, making them environmentally friendly and suitable for use in a wide range of applications.

## 3. Applications

### Power Supplies
In power supply circuits, voltage spikes can occur due to various reasons, such as lightning strikes, sudden load changes, or switching transients. The 1.5SMC440A - E3/57T TVS diodes can be used to protect the power supply output and the connected electronic devices from these voltage spikes. They can be placed across the power lines to divert the excess current and limit the voltage to a safe level, ensuring the stable operation of the power supply and the connected equipment.

### Automotive Electronics
Automotive electrical systems are exposed to a variety of transient events, including load dumps, inductive switching, and electromagnetic interference. The 1.5SMC440A - E3/57T series can be used in automotive applications such as engine control units (ECUs), infotainment systems, and lighting systems. They provide reliable over - voltage protection for the sensitive electronic components in these systems, helping to improve the overall reliability and safety of the vehicle.

### Industrial Control Systems
Industrial control systems often operate in harsh environments where voltage spikes and electrical noise are common. The 1.5SMC440

Images for reference

DO-214AB, SMC

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Datasheets

Partlist

1.5SMC440A-E3/57T