- 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)

Silicon Protection Arrays™ Publish Date: 2008-11-07

The SP03-xB, a series of broadband protection device from Littelfuse, provides overvoltage protection for applications.

SxX8xSx Series Publish Date: 2009-01-20

Littelfuse's SxX8xSx device series offers a high static dv/dt and lower turn-off (Tq) sensitive SCR with its small die planar construction design.

SP725 Series Diode Array Publish Date: 2009-03-09

Littelfuse's SP725 is an array of SCR / diode bipolar structures for ESD and overvoltage protection of sensitive input circuits.

443 Series Fuse Publish Date: 2009-04-13

Littelfuse's 443 series fuse is a 250 VAC surface mount fuse line designed for automated pick and place circuit board manufacturing processes.

437 Series Fuse Publish Date: 2009-04-13

Littelfuse's 437 Series - 1206 size lead-free, halogen free, high temperature very fast-acting thin-film fuse provides over current protection to circuits.

TwinChip™ Series - DO-214 Publish Date: 2009-04-21

TwinChip series DO-214 are very low capacitance SIDACtor devices designed to protect broadband equipment such as VoIP and DSLAMs from damaging overvoltage transients.

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

Recent PTMs View All (21)

Metal Oxide Varistors Publish Date: 2011-05-31

The basic operation, electrical characteristics, and applications of Littelfuse's Metal Oxide Varistors.

Duration: 30 minutes
PLED Devices - Open LED Protector Publish Date: 2011-10-31

The primary purpose of the PLED protectors is to bypass an LED that has failed open and not disrupt the flow to other LEDs in the series circuit.

Duration: 15 minutes
Ethernet Protection Publish Date: 2011-10-31

Ethernet connections, their potential electrical vulnerabilities, and the protection solutions offered by Littelfuse.

Duration: 10 minutes
Introduction to SIDACtor Devices Publish Date: 2011-10-31

SIDACtor devices interaction characteristics that need to be considered in the design process include let through voltage, turn-on time, and capacitance.

Duration: 35 minutes

Featured Videos View All (41)

US Sensor/Littelfuse Company Profile

US Sensor/Littelfuse Company Profile

Littelfuse TVS Diodes | Digi-Key Daily

Digi-Key Daily previews TVS Diodes from Littelfuse. TVS diodes shut harmful surges to prevent harming sensitive electronics and measure 8.6 mm long and have a 8.6 mm diameter axial. Diode's TVS diodes meet AEC, IEC, ISO, UL, and JEDEC standards.

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

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