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- Littelfuse products are vital components in applications that use electrical energy, from consumer electronics to vehicles and industrial facilities. They offer the industry’s broadest and deepest portfolio of circuit protection products, with growing platforms in power control and sensing. They are expanding into adjacent markets as part of their corporate strategy of accelerated organic growth and strategic acquisitions. These markets include power semiconductors, heavy-duty switches, magnetic, optical, electromechanical, and temperature sensors; and products that provide safe control and distribution of electrical power. Related Product brands: IXYS Corporaton, IXYS Integrated Circuits Division, IXYS RF, MicroWave Technology, U.S. Sensor

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

Spotlight Videos

Image of Littelfuse's MP8000 Bluetoth Overload Relay

MP8000 Bluetooth Overload Relay

See how the Littelfuse Bluetooth Overload Relay uses the smartphone to protect motors and pumps while saving time and keeping customers safe from arc flash. Learn More

Image of Littelfuse's Surge Protection Modules

Littelfuse Surge Protection Modules LSP10GIHP

LED protection optimization using Littelfuse Surge Protectors. Learn More

Newest Products View All (243)

Image of Littelfuse's SP1333 Series TVS Diode Array

SP1333 Series TVS Diode Array

Littelfuse's SP1333 series diodes provide symmetrical data line protection from ESDs up to ±30 kV and tolerate surges >5 A for extended operating life.

Learn More
Image of Littelfuse's TVS Diode Low Capacitance ESD Protection - SP4203 Series

TVS Diode Low-Capacitance ESD Protection - SP4203 Series

Littelfuse's SP4203 integrates low-capacitance diodes to provide electronic equipment protection from destructive electrostatic discharges (ESD).

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Image of Littelfuse's High Voltage Low Current Power Fuses – HEV Series

High-Voltage Low-Current Power Fuses - HEV Series

Littelfuse’s HEV series of high voltage power fuses are designed for use in the hybrid and electric vehicles and in industrial circuits.

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Image of Littelfuse SPD2 Series DIN Rail Mounted Surge Protection Devices

Surge Protection Devices (SPDs) – DIN Rail Mounted – SPD2 Series

Littelfuse's SPD2 series of surge protection devices (SPDs) are designed for equipment protection from transient overvoltage events.

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Image of Littelfuse's PSR Series POWR-SPEED® Fuses

PSR Series POWR-SPEED® High-Speed Square Body Fuses

Littelfuse POWR-SPEED® fuses are specifically designed to protect devices that are typically designed into power conversion and power conditioning equipment.

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Image of Littelfuse's Hybrid Battery Mini-Breakers (TCO and PPTC Devices) – MHP-TAC Series

Hybrid Battery Mini-Breakers (TCO and PPTC Devices) – MHP-TAC Series

Littelfuse’s MHP-TAC series hybrid battery mini-breakers (TCO/PPTC devices) offer higher voltage rating (12 VDC) and smaller size than typical MHP-TAM devices.

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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 (21)

Image of Littelfuse TMOV

Thermally Protected MOVs - TMOVs

Duration: 5 minutes

An introduction to basic operation, electrical characteristics, product portfolio, features and benefits, and applications for TMOVs.

Resistance Temperature Detectors

Resistance Temperature Detectors

Duration: 5 minutes

Introduction of the Littelfuse thin film platinum resistance temperature detectors

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

Featured Videos View All (40)

Building Automation – Protect/Sense/Control

Building Automation – Protect/Sense/Control

Publish Date: 2019-04-09

POWR-SPEED® High-Speed Square Body Fuses - PSR Series

POWR-SPEED® fuses specifically designed for protection of power semiconductor devices such as diodes, triacs, IGBTs, SCRs, MOSFETs and other solid state devices that are typically designed into power conversion and power conditioning equipment.

Publish Date: 2019-03-05

Littelfuse AQ24CANFD TVS Diode Arrays | Digi-Key Daily

AQ24CANFD TVS diode arrays provide enhanced performance verification across a wider temperature range than most commercial products can offer and the clearly defined product flow from wafer creation to back-end processes ensure their provenance.

Publish Date: 2019-01-07

Littelfuse product Everywhere, Every Day

Many of the products you use every day contain Littelfuse products. They’re an integral part of smart phones, kitchen appliances, automotive electronics, HVAC, water/wastewater, energy, transportation, and beyond.

Publish Date: 2018-12-18

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