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  • Products
    • Automotive Sensors

        Automotive Sensors

        Littelfuse Automotive Sensor Products offer a wide range of sensors for use in monitoring various vehicular functions in the areas of passenger safety, comfort and convenience plus vehicle powertrain, chassis and emission applications.
      • Chassis
      • Comfort and Convenience
      • Emissions
      • Passenger Safety
      • Powertrain
    • Battery Management

        Battery Management

        Littelfuse battery management devices provide methods of conserving battery power, protecting against over-discharge, combining and protecting auxiliary equipment such as liftgate motors.
      • Battery Combiners
      • Battery Disconnect Switches
      • Battery Isolators
      • FlexMod Electronic Modules
      • Low Voltage Disconnects
    • Battery mini-Breakers

        Battery mini-Breakers

        Littelfuse battery mini-Breakers provide battery cell protection for high-capacity Lithium Polymer and prismatic cells.
      • Metal Hybrid Protection
    • Custom-Engineered Electrical Equipment

        Custom-Engineered Electrical Equipment

        Designing and Building Custom-Engineered Modules for Electrical Distribution, Protection and Control.
      • Arc-Resistant Load Break/Disconnect Switches
      • Arc-Resistant Switchgear
      • Custom Built Switchgear MCC
      • Dewatering Substations
      • Integrated Variable-Frequency Drives
      • Littelfuse Startco Soft Starters
      • Metal-Clad and Metal-Enclosed Switchgear
      • Mine-Duty Medium-Voltage Junction Box
      • Mining Machine Controls
      • Neutral-Grounding Resistors
      • Outdoor Portable Substations (Skid and Trailor Mounted)
      • Power Factor Correction Systems/Capacitor Banks
      • Power Monitoring and Control
      • Power Takeoff Panels (PTO)
      • Reconditioning and Upgrade Services
      • Switch Houses
      • Trailer or Skid-Mounted Gen Set
      • Underground Portable Power Centres
    • DC Vehicle Connectors

        DC Vehicle Connectors

        Electrical sockets, plugs and coils used for connection of a truck and trailer on commercial vehicles or caravans for 12 and 24V systems.
      • 13-Pole Sockets and Plugs
      • 15-Pole Sockets and Plugs
      • 15-Pole Spiral Coils
      • 2-Pole - 3-Pole Sockets and Plugs
      • 7-Pole Sockets and Plugs
      • 7-Pole Spiral Coils
      • ABS - EBS Sockets and Plugs
      • ABS - EBS Spiral Coils
      • Connector Accessories
      • Greycon Connectors
      • ISOBUS Connectors
    • DC Power Distribution Modules

        DC Power Distribution Modules

        Feature multiple electrical power outputs, acceptance of many fuses, fuse types & relays.
      • Auto & Commercial Vehicle Fuse Holders
      • Configurable PDM
      • Fuse Only PDM
      • Hard Wired PDM
      • Power Distribution Accessories
      • POWR-BLOK Modular Power Distribution
      • Unsealed PDM
    • DC Solenoids and Relays

        DC Solenoids and Relays

      • Bi-Stable Latching Relays
      • Plug In Relays
      • Solid State Relays
      • Speciality Relays
      • Standard High Current Relays
      • Time Delay and High Power Relays
    • EMC Components

        EMC Components

        Common Mode Noise Filters (CMF) attenuate common mode noise in differential and balanced transmission, and power supply and audio lines.
      • Common Mode Noise Filters
      • Common Mode Filters with ESD Protection
    • Fuse Blocks, Fuse Holders and Fuse Accessories

        Fuse Blocks Fuse Holders and Fuse Accessories

        Littelfuse offers a comprehensive line of fuse blocks, fuse holders, and fuse accessories for automotive, electronic, and electrical markets.
      • Auto & Commercial Vehicle Fuse Holders
      • Bodies, Caps, Covers and Terminals
      • Box Cover Units
      • Dead Front Fuse Holders
      • Electrical Power Distribution Blocks
      • Fuse Blocks
      • Fuse Clips
      • Fuse Modules
      • Fuse Pullers
      • Fuse Reducers
      • Fuseholders
      • Inline Watertight Fuse Holders
      • Plug Fuse Adapters
      • POWR-GARD Fuse Blocks
      • Specialty Items
      • Telcom Disconnect Switches
    • Fuses

        Fuses

        Littelfuse manufactures the broadest and most innovative selection of fuses.
      • Automotive Aftermarket Products
      • Automotive Passenger Car
      • Axial Radial Thru Hole Fuses
      • Cartridge Fuses
      • Hazardous Area Type Fuses
      • Industrial Power and UL Fuses
      • Medium Voltage Fuses
      • Military High Reliability Fuses
      • Specialty Power Fuses
      • Surface Mount Fuses
    • Fusible Switches and Panels

        Fusible Switches and Panels

        Provide a complete, one-piece solution for easy procurement and code compliance.
      • LCP Series
      • LPS Series
      • XPress-Ship™ Program
    • Gas Discharge Tubes

        Gas Discharge Tubes

        Dissipate high voltage transients through a contained plasma gas with high surge capability, low capacitance and small size.
      • High Voltage GDT
      • Low to Medium Surge GDT
      • Medium to High Surge GDT
      • Squared GDT
      • Very High Surge GDT
    • Inductors

        Inductors

        Range of power inductors utilizing thin film photolithography technology metal alloy composite with low loss and high current capability for power supply circuits.
      • Power Inductors
    • Magnetic Sensors and Reed Switches

        Magnetic Sensors and Reed Switches

        Magnetic sensing products utilizing Reed and Hall Effect technologies, with custom solutions available.
      • Custom Sensors
      • Hall Effect Sensors
      • Magnetic Actuators
      • Reed Relays
      • Reed Sensors
      • Reed Switches
    • New Products
    • Other Products and Accessories

        Other Products and Accessories

      • Accessories
      • BusBars and Terminal Blocks
      • Circuit Breakers
      • Connectors
      • Knobs and Nuts
      • Pilots, Lamps and Alarms
      • Power Distribution
      • Tracto-Trailer and Auto-RV Connectors
      • Wiring Accessories
    • Polymer ESD Suppressors

        Polymer ESD Suppressors

        Low capacitance polymer base product for protecting high speed data circuit from ESD damage and maintaining data integrity.
      • PESD Protection Devices
      • PULSE-GUARD® ESD Suppressors
      • XTREME-GUARD™ ESD Suppressors
    • PolyZen Devices

        PolyZen Devices

        Polymer-enhanced, precision Zener diodes that offer resettable protection against multi-Watt fault events without the need for multi-Watt heat sinks.
      • Miniature PolyZen Devices
      • Standard PolyZen Devices
    • Power Semiconductors

        Power Semiconductors

        High reliability power semiconductors utilize the latest technology.
      • Silicon Carbide
      • Ignition IGBTs
      • IGBT Modules
      • Switching Thyristors
      • Schottky Diodes
      • Ultrafast Rectifier
      • Thyristors Modules
      • Rectifier Modules
    • Protection Relays and Controls

        Protection Relays and Controls

        A full range of Protection Relays and Controls for the harshest environments.
      • Accessories
      • Alternating Relays
      • Arc Flash Detection
      • Covers and Mounting Adapters
      • Feeder Protection
      • Ground Fault Relays
      • Flashers and Tower Lighting Controls
      • Industrial Products
      • Intrinsically Safe Relays
      • Motor and Pump Protection
      • Pump Controls and Liquid Level Controls
      • Relay Current Transformers
      • Relay Software
      • Resistance Grounding
      • Retrofit Kits
      • Single Function Relays
      • Time Delay Relays
      • Trailing Cable Protection
      • Voltage Monitoring Relays
    • Resettable PTC Fuses

        Resettable PTC Fuses

        Resettable Overcurrent Protection devices with various options: Surface Mount, Radial Leaded, Strap and Low Resistance.
      • Battery Strap
      • Bladed Devices
      • Line Voltage Rated Devices
      • Low Resistance
      • Radial Leaded
      • Surface Mount
      • TD and Chip
      • Telecom
    • Semiconductors

        Semiconductors

        Power Semiconductors

      • Silicon Carbide
      • Ignition IGBTs
      • IGBT Modules
      • Switching Thyristors
      • View All

        LED Protectors

      • PLED
      • PLED 5 QFN
      • PLED 5HT SOT 89
      • PLED6M
      • View All

        SIDACtor® Protection Thyristors

      • Baseband Voice DS1 Protection
      • Broadband Optimized Protection
      • High Exposure Surge Protection
      • Line Circuit Access Switch LCAS Protection
      • View All

        TVS Diode Arrays

      • Automotive Qualified
      • General Purpose ESD Protection
      • Lightning Surge Protection
      • Low Capacitance ESD Protection
      • Ultra Low Capacitance
      • TVS Diodes

      • Automotive and High Reliability TVS
      • Leaded
      • Surface Mount
      • View All
    • Shock-Block™ GFCI

        Shock-Block™ GFCI

        Shock protection for people and equipment working in dangerous environments.
      • Industrial Shock-Block GFCI
      • Shock-Block GFCI Rental Products
    • Surge Protection Module

        Surge Protection Module

        Used in surge protectors, thermally protected varistor modules from Littelfuse are built with high-quality, dependable materials.

      • LED Lighting Surge Protection Modules
    • Switches

        Switches

        Features manually-operated, foot-operated, and mechanically-operated switches; and switches operated by temperature or pressure.
      • Battery Disconnect Switches
      • Ignition Switches
      • Manual Battery Disconnect Switches
      • Momentary Switches
      • Electrical Battery Disconnect Switches
      • Push-Pull Switches
      • Rocker Switches
      • Rotary Switches and Headlamp Switches
      • Plunger Switches
      • Special Purpose Switches
      • Toggle Switches
      • Windshield Wiper Switches
    • Temperature Sensors

        Temperature Sensors

        Innovative temperature sensing solutions
      • Leaded RTDs
      • Leaded Thermistors
      • Power Thermistors
      • RTD Probes and Assemblies
      • Surface Mount Thermistors
      • Thermistor Probes and Assemblies
    • Varistors

        Varistors

        Reliable standard and thermal protected varistor, available in a variety of forms, surge current capability up to 70,000 Amp.
      • 2Pro Devices
      • Industrial High Energy
      • Multi-layer
      • Radial Leaded
      • Specialty
      • Surface Mount
      • Thermally Protected
  • Industries
    • Automotive
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    • Electrical Maintenance and Repair
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    • LED Lighting
    • Marine
    • Medical
    • Military Electronic Parts
    • Mining
    • Oil, Gas and Petroleum
    • Power Generation
    • Solar
    • Telecom
    • Water Wastewater
    • White Goods
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    • Custom Circuit Protection Solutions
    • Custom Power Centers and Electrical Equipment
    • Electrical Safety Services
    • MROplus Industrial Fuse Consolidation
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    • Ceramic, Polymer, and Fuse
    • Commercial Vehicle
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  • Home
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Services

Littelfuse utilizes a dedicated staff of experts to help you overcome your circuit protection challenges. By partnering with you from design to development, we will deliver many solutions to meet your needs.

Services

Littelfuse utilizes a dedicated staff of experts to help you overcome your circuit protection challenges. By partnering with you from design to development, we will deliver many solutions to meet your needs.

Services

Littelfuse utilizes a dedicated staff of experts to help you overcome your circuit protection challenges. By partnering with you from design to development, we will deliver many solutions to meet your needs.

Services

Littelfuse utilizes a dedicated staff of experts to help you overcome your circuit protection challenges. By partnering with you from design to development, we will deliver many solutions to meet your needs.

  • Put our product and application expertise to work for you: the Littelfuse engineering team is continuously working with ...Read More

    Custom Circuit Protection Solutions
  • Littelfuse creates custom power centers and electrical equipment that will fit your specific application needs. ...Read More

    Custom Power Centers and Electrical Equipment
  • Arc Flash Services and Electrical Safety Products, Resources and Training designed to improve safety at your facility....Read More

    Electrical Safety Services
  • MROplus

    MROplus™ industrial fuse consolidation and selection optimizes your fuse inventory for improved safety and lowers your o...Read More

    MROplus - Industrial Fuse Consolidation
  • Our services include overcurrent, overvoltage, ESD and high-speed datacom and telecom testing, material analysis and spe...Read More

    Testing Services

Littelfuse Capabilities Brochure

  • Littelfuse corporate capabilities brochure 

    Download the corporate capabilities brochure.

    View PDF

Littelfuse Labs Brochure

  • labs brochure cover 

    Download the testing services and lab capabilities brochure.

    View PDF

MROplus Information


  • MROplus Brochure
  • Littelfuse MRO Plus Fuse Consolidation
    MROplus One-Page Flyer

  • MROplus Request Form

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Littelfuse, Inc. 8755 West Higgins Road Suite 500, Chicago, IL, 60631 USA, 773-628-1000 Copyright © 2018 Littelfuse, Inc.