Reliable Solutions for Power Tool Design
Littelfuse components enable efficient switching, precise control, and robust circuit protection in power tool design. Explore our Power Tools application page to learn more.
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Named a 2025 Most Responsible Company
For the third consecutive year, Newsweek and Statista name Littelfuse as an industry leader dedicated to driving meaningful global impact.
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Arc-Flash Relays Explained
Learn about arc-flash dangers and the tools and information needed to help protect people and systems from these hazardous arc faults.
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Seek Better Battery Protection & Control
Learn about our innovative products for enhancing the safety and efficiency of rechargeable lithium batteries in smartphones, power tools, EVs, and wind or solar farm BESS.
Learn MoreFeatured Products
Tactile Switches
KSC2 Dual Circuit Technology with 3.5 mm Actuator Height
The Littelfuse|C&K innovative tactile switch series offers a 3.5 mm actuator height, lower than the KSC4 DCT with its 5.2 mm actuator height. Combined with single pole double throw (SPDT) functionality and the Electrical Height specification, the KSC2 DCT delivers unmatched functionality in a compact, space-saving design.
AEQ101 T&R
Series: TPSMB - TPSMB150CA
The TPSMB150CA, part of the TPSMB series, is AEC-Q101 qualified for automotive use. This TVS diode protects sensitive automotive components from transient voltage, ensuring reliable performance.
SRP1 Series Solid-State Relays
High-Endurance Industrial Solid-State Relays
High reliability, fast switching and superior uptime for the most demanding applications that demand extensive on/off switching.
Electronic On/Off Switches
HCC & HCD Series Definite Purpose Contactors
Look to Littelfuse when your application demands a compact, long-lived contactor controlled by a thermostat, relay, or push button.
Bolt-Down Single Fuse Holders
ZCASE® SMZ Series Fuse Holder
The ZCASE® SMZ Series Bolt-Down Fuse Holder simplifies installation by enabling ZCASE® high-current fuses to mount directly on an alternator, battery switch, or relay, reducing wiring and parts.
AF0025 Series Arc-Flash Relay
Compact Arc-Flash Detection & Protection Solutions
Space-saving AF0025 relays provide ideal solutions for protecting combiner boxes and panels against damaging arc flashes. The relays work in ac or dc systems and feature internal failsafe mechanisms.
TTP Platform
Series: TTP
The TTape platform is a distributed temperature monitoring technology for battery packs that helps to improve the detection of localized cell overheating. This helps to increase the lifetime of batteries and provides thermal runaway protection.
Empowering a Sustainable, Connected, and Safer World
Applications Spotlight
Power Train Components
Explore how Littelfuse solutions help improve the safety, reliability, and functionality of the various systems that make up the modern electric vehicle’s power train.
Success Story
Shock Block Offers Maximum Protection
Winemaking facilities often create damp environments. Read Peller Winery's approach to protect employees from possible electric shock.
Solutions Spotlight
Alternative Energy: Green Hydrogen
Learn about green hydrogen production, the latest industry trends, and Littelfuse solutions to build a green hydrogen value chain.
Education & Insights
Product Test Report
Littelfuse Solid-State Relays Quality Test Report
Learn how endurance testing and performance evaluation play a vital role when choosing an SSR.
BESS Capabilities
Explore Our Battery Energy Storage Systems Capability Guide
Learn how battery energy storage systems make large renewable energy projects more practical.
BAUMA
BAUMA is the World's Leading Trade Fair for Construction Machinery, Building Material Machines, Mining Machines, Construction Vehicles and...
SolarEX 2025 Tradeshow
SolarEX Istanbul 2025 which will be held at the Istanbul Fair Center. Serving as a platform where the latest products and technologies in the solar...
Electronic Products Product of the Year 2024
Winner of Electronic Products 2024 Product of the Year in Electromechanical Components, the KSC2 Series features precise Electrical Height for...
Littelfuse Explains the Benefits of Choosing Quality Over Price for Solid-State Relays
Paper addresses the risk of poor-quality solid-state relays and how to avoid when selecting products