Littelfuse 2025 Sustainability Report
Every Littelfuse team member, customer, and partner can spark positive change. Explore our 2025 Sustainability Report to see the impact we’re making together.
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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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Product Cross-Reference Tool
Quickly compare Littelfuse parts against those of other manufacturers to find the right specifications, features, and benefits for your application.
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Newest Fuse Plant Boosts Capacity
Our newest fuse manufacturing plant in Piedras Negras, Coahuila, Mexico delivers precision with innovative automation and also furthers our sustainability commitment.
Learn MoreFeatured Products
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.
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.
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
Design Guide
Electrostatic Discharge (ESD) Suppression Design Guide
This guide helps designers identify ESD solutions for various applications.
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.
EVS38 2025
The premier event for academic, government and industry professionals involved in electric drive technologies.
NFPA 2025
The 2025 NFPA Conference & Expo® brings to life, products and services needed to help meet and maintain compliance with prevailing codes and...
KSC PF Tactile Switches Provides Potting-Friendly Solution
These tactile switches, rated for up to 1 million cycles, deliver exceptional durability and reliability for high-end consumer, aerospace,...
Littelfuse Names Abhi Khandelwal Chief Financial Officer
Littelfuse, Inc. (NASDAQ: LFUS), a leader in developing smart solutions that enable safe and efficient electrical energy transfer, today announced...