Littelfuse Inc.
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SMF4L60A
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SMF4L60A

Introduction

The SMF4L60A is a diode designed for use in automotive applications, specifically within the transmission control module (TCM) of vehicles equipped with the 4L60E automatic transmission. This diode serves as a protective component to prevent voltage spikes and transients from damaging sensitive electronic components within the TCM.

Basic Information Overview

  • Category: Diode
  • Use: Protection against voltage spikes and transients in TCM
  • Characteristics: Fast response time, high surge capability
  • Package: SOD-123FL
  • Essence: Protection of TCM electronics
  • Packaging/Quantity: Tape & Reel, 3000 units per reel

Specifications

  • Peak Pulse Power: 400W
  • Breakdown Voltage Range: 5.8V to 6.45V
  • Operating Temperature Range: -55°C to +150°C
  • Storage Temperature Range: -55°C to +150°C

Detailed Pin Configuration

The SMF4L60A diode has a standard SOD-123FL package with two pins. The pin configuration is as follows: - Pin 1: Anode - Pin 2: Cathode

Functional Features

  • Fast response time to clamp transient voltages
  • High surge capability for reliable protection
  • Low clamping voltage to minimize stress on TCM components

Advantages and Disadvantages

Advantages

  • Effective protection against voltage spikes
  • Compact SOD-123FL package for space-constrained applications
  • Wide operating temperature range for versatility

Disadvantages

  • Limited breakdown voltage range compared to some alternative models
  • Higher clamping voltage than certain specialized diodes

Working Principles

The SMF4L60A operates based on the principle of avalanche breakdown, where it rapidly conducts when the voltage across it exceeds the breakdown voltage. This effectively shunts excess voltage away from the TCM, protecting it from damage.

Detailed Application Field Plans

The SMF4L60A is primarily used in automotive applications, specifically within the TCM of vehicles equipped with the 4L60E automatic transmission. It provides crucial protection against voltage transients that could otherwise compromise the functionality of the TCM and, by extension, the transmission system.

Detailed and Complete Alternative Models

  • SMF3.3A: Lower breakdown voltage, suitable for more sensitive TCM designs
  • SMF5.0A: Higher breakdown voltage, ideal for applications with higher voltage transients
  • SMF6.8A: Higher surge capability, suitable for harsh operating conditions

In conclusion, the SMF4L60A diode plays a vital role in safeguarding the TCM of vehicles equipped with the 4L60E automatic transmission, ensuring the reliability and longevity of the transmission control electronics. Its fast response time, high surge capability, and compact package make it a valuable component in automotive electronics protection.

Énumérez 10 questions et réponses courantes liées à l'application de SMF4L60A dans les solutions techniques

  1. What is SMF4L60A?

    • SMF4L60A is a type of surface mount TVS diode designed to protect sensitive electronics from voltage transients induced by lightning and other transient voltage events.

  2. What are the key features of SMF4L60A?

    • The key features of SMF4L60A include a low profile package, high surge capability, fast response time, and compatibility with automated placement equipment.

  3. What are the typical applications of SMF4L60A?

    • SMF4L60A is commonly used in applications such as automotive electronics, portable electronics, industrial controls, and telecommunications equipment to protect against voltage surges.

  4. What is the maximum clamping voltage of SMF4L60A?

    • The maximum clamping voltage of SMF4L60A is typically around 77 volts.

  5. How does SMF4L60A provide protection against voltage transients?

    • SMF4L60A diverts excessive current away from sensitive components by providing a low-impedance path to ground, thus protecting the circuitry from damage.

  6. What is the operating temperature range of SMF4L60A?

    • The operating temperature range of SMF4L60A is usually between -55°C to 150°C, making it suitable for a wide range of environments.

  7. Is SMF4L60A RoHS compliant?

    • Yes, SMF4L60A is typically RoHS compliant, meaning it meets the Restriction of Hazardous Substances directive.

  8. Can SMF4L60A be used in high-speed data line protection?

    • Yes, SMF4L60A is suitable for high-speed data line protection due to its fast response time and low capacitance.

  9. What are the recommended soldering conditions for SMF4L60A?

    • The recommended soldering conditions for SMF4L60A typically include a peak reflow temperature of 260°C for 10 seconds.

  10. Are there any alternative devices to SMF4L60A with similar characteristics?

    • Yes, there are alternative TVS diodes with similar characteristics such as SMAJ58A, SMBJ58A, and SMCJ58A that can be considered based on specific application requirements.