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.
Learn MoreNamed 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
Solutions Spotlight
Small Appliance Components
Consult block diagrams to see how we can help you build reliable, energy-efficient, and IoT-enabled robotic vacuums, coffee machines, electric cookers, air purifiers, etc.
Renewable Energy Feature
How Solar Fuses Perform Better
Read how Littelfuse delivered low-cost solar fuses that perform well at high temperatures for a cabling and switching manufacturer.
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
Electrical Solutions
Improve Safety with Instant Arc-Flash Detection
See Littelfuse Arc-Flash Relays and read examples of relays protecting critical equipment.
BESS Capabilities
Explore Our Battery Energy Storage Systems Capability Guide
Learn how battery energy storage systems make large renewable energy projects more practical.
