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Littelfuse

- Littelfuse (NASDAQ: LFUS) - As the worldwide leader in circuit protection, Littelfuse offers POWR-GARD®, Teccor®, Wickmann®, Pudenz®, Hamlin®, PulseGuard®, SIDACtor®, PolySwitch, 2Pro and PolyZen branded products, with a wide range of technologies such as Fuses and Accessories, PTCs (PolySwitch), GDTs, Varistors, Polymer ESD Suppressors, Surge Protection Modules, TVS Diodes, TVS Diode Arrays (SPA® Diodes), Switching Thyristors, Power Modules, LED Protector, SIDACtor® Protection Thyristor as well as reed switches, relays and Hall Effect sensors. Littelfuse products are backed by more than 88 years of technology innovation, industry leading technical support, design and manufacturing expertise. Littelfuse products are vital components in virtually every product that uses electrical energy, including automobiles, computers, consumer electronics, handheld devices, industrial equipment, and telecom/datacom circuits.

TVS Diodes

TVS Diodes

Littelfuse TVS diodes are used to protect semiconductor components from high-voltage transients. Learn More

SPA® Family of TVS Diode Arrays

SPA Family of TVS Diodes

Littelfuse SPA family of TVS diode array devices are designed to protect electronics from very fast and often damaging voltage transients. Learn More

Magnetic Sensors and Reed Switches

Sensor Thumbnail

Littelfuse's selection of magnetic sensors includes reed switches, reed sensors, Hall Effect sensors, and reed relays, as well as bare and packaged magnetic actuators. Learn More

Product Listing View All

Featured Products

Image of Littelfuse's LSP Series LED Thermally Protected Surge Protective Device

LSP Series LED Thermally Protected Surge Protective Device

The LSP05 and LSP10 Surge Protection Modules from Littelfuse provide transient overvoltage protection for outdoor and commercial LED lighting fixtures. Learn More

Image of Littelfuse's MG Series IGBT Power Modules

MG Series IGBT Power Semiconductor Modules

An expanded offering of IGBT module power semiconductor products for motor control and inverter applications is now available from Littelfuse. Learn More

Newest Products View All (146)

Sensor Thumbnail

Magnetic Sensors and Reed Switches

Littelfuse has a large portfolio of magnetic sensors and reed switches that are available in a variety of combinations to meet your design needs.

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Image of Littelfuse Ultra-Low Voltage Schottky Barrier Rectifiers DST Series

Ultra-Low Voltage Schottky Barrier Rectifiers DST Series

Littelfuse offers a series of silicon Schottky devices designed for ultra-low forward voltage drop (VF) to its rapidly expanding power semiconductor portfolio.

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Image of Littelfuse Reed Sensors for Press Fit Installation 59040 Series

Reed Sensors for Press Fit Installation 59040 Series

Littelfuse 59040 series press-fit Firecracker reed sensors are small, cylindrical reed sensors 31 mm (1.22") long that press into a 9.5 mm (.375") diameter hole.

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Innovative Circuit Protection Solutions

Circuit protection solutions from Littelfuse increase device life by protecting designs from overcurrent and overvoltage faults.

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Image of Littelfuse's MBR Series Schottky Barrier Rectifiers

Schottky Barrier Rectifiers MBR Series

Littelfuse MBR series Schottky barrier rectifiers are devices based on silicon Schottky diode technology and used for commercial and industrial applications.

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Image of Littelfuse's DUR Series Schottky Ultra-Fast Barrier Rectifiers

Schottky Ultra-Fast Barrier Rectifiers DUR Series

Littelfuse Schottky ultra-fast rectifiers DUR series are used in applications including inductive heating/melting and ultrasonic cleaners and welders.

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Tools and Support

Image of Littelfuse's LED Lighting Surge Protection Modules

LED Lighting Surge Protection Modules Design and Installation Guide

Design Guide for the LSP series SPD Modules, part selection and importance of adding this module to LED lighting applications. Learn More

Image of Littelfuse's Sensors Product Catalog

Sensors Product Catalog and Design Guide

This Guide provides introduction to magnetic sensing and offers practical suggestions for selecting reed switches, reed sensors and Hall effect sensors for a variety of applications. Learn More

Image of Littelfuse's TVS Diode Applications Overview

Transient Voltage Suppressor Application Overview

Application overview of different voltage transients that can occur and how to apply TVS Diode protection. Learn More

Image of Littelfuse's IGBT and Rectifier Diode Modules

IGBT and Rectifier Diode Power Semiconductor Modules Guide

Quick selection guide on circuit type, package type, collector emitter voltage and amperage rating options available IGBT and Rectifier modules. Learn More

Image of Littelfuse's ESD Protection Using TVS Diode Arrays

ESD Protection using TVS Diode Arrays Design Guide

This guide was developed to help designers navigate a selection of appropriate TVS Diode Array circuit protection, includes consideration factors, example circuits and recommended components. Learn More

Image of Littelfuse's Fuseology 101

Introduction to Circuit Protection - Fuseology 101

User friendly Fuseology Selection Guide makes the process quick and easy by helping with all the key parameters in selecting the proper over current protection Fuse or PTC resettable device. Learn More

Product Training Modules View All (16)

protecting network and telecommunication port

Top 5 Design Considerations

Duration: 20 minutes

This presentation will provide the top five criteria to consider when performing a protection need analysis for Network or Telecommunication interface.

Reed Switches

Reed Switch Basics

Duration: 5 minutes

Basic operation, terminology, characteristics, and applications will be discussed, as well Q&A on selecting the proper reed switch

F2393-ND

Fuseology - Introduction to Fuses

Duration: 5 minutes

Fuses are instrumental circuit protection devices designed to serve as overcurrent protectors in a circuit

LSP10 Series

Surge Protection LSP05 and LSP10 Series

Duration: 5 minutes

The LSP series of lighting protection modules are designed to provide high energy surge protection and increased reliability for many types of outdoor lighting applications.

Featured Videos View All (12)

Littelfuse SIDACtor Thyristors | Digi-Key Daily

Littelfuse SIDACtor thyristors are a broadband DSLP biased series custom tailored to protect g.fast and other DSL hardware from overvoltage situations without affecting signal integrity.

Littelfuse's Philosophy behind Speed2Design Website

Littelfuse's Philosophy behind Speed2Design Website

Littelfuse's Thane Parker Amps UP Circuit protection

Littelfuse's Thane Parker Amps UP Circuit protection

Additional Content

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SPICE Models

Application Notes - View All

Littelfuse CPD Acquired Products

Application Notes

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