Introducing C&K® Switches
C&K Switches products are now on Littelfuse.com, delivering a unified portfolio of switching solutions with expanded expertise and global support.
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Find the Right Fuse Holder Fast
Use our online selection guide to quickly identify the right automotive fuse holder, then check distributor stock and access fuse kits and resources.
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NANO² SMD 415 Series Fuse
Electronic Design News (EDN) has named the Littelfuse NANO²® 415 Series Surface Mount Fuse the winner of the 2025 Product of the Year Award in the Passives category.
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Explore Electrical Safety
Explore electrical safety principles and protection strategies that keep workers safe, reduce downtime, prevent damage, and support reliable industrial operations.
Learn MoreFeatured Products
IX4352NEAU Gate Driver
Automotive Gate Driver with Negative Gate Bias & Protections
AEC-Q100 qualified gate driver with separate 9 A source/sink outputs, integrated protections, and an internal charge pump delivering −10 V bias for robust, high-dv/dt EV inverter designs.
K5V Series Tactile Switch
Sharp Tactile Feedback with Integrated LEDs
High-reliability tactile switch with gold-plated contacts and integrated LEDs. Long travel with crisp tactile/audible feedback in a compact footprint for status indication.
59150 Flange-Mount Reed Sensor
Compact, Sealed Sensor for Harsh or Concealed Environments
Compact, IP67-sealed reed sensor rated to 265 Vac/300 Vdc. Enables reliable non-contact sensing in space-constrained designs requiring low power operation and resistance to moisture and contaminants.
LFRU Fuse Reducers
Adaptable, Cost-Saving Fuse-to-Clip Solutions
Adapts lower-rated fuses into higher-rated clips to prevent overfusing and simplify inventory. Ideal for transformers, VSDs, MCCs, and test or temporary current-limiting applications.
Residual Current Protection
EV Charging Protection
Compact and reliable, these monitors detect AC and DC leakage in EV charging systems in real time—preventing hazards and ensuring continuous safety.
Empowering a Sustainable, Connected, and Safer World
Success Story
Smart Protection for Smarter Flossers
A health care OEM designing a compact, USB-C rechargeable water flosser needed to manage overcurrent, overheating, and moisture risks—without compromising space or safety.
Success Story
Sealed Tactile Switch Powers Reliability
A power tool manufacturer needed a durable, compact switch to activate the battery-level indicator on its next-gen cordless drill.
Success Story
TVS Diodes Fortify USB-C Ports
A leading laptop manufacturer needed to protect USB Type-C ports from ESD, surges, and other transients without compromising signal integrity or consuming excess board space.
Education & Insights
Technical Paper
How to Size a Heatsink for Industrial Solid State Relays
Use this guide to select the right heatsink for panel-mounted SSRs using practical thermal methods.
Selection Guide
Quick Fuse Selection Guide
Find the right fuse for your electronic applications.
PCIM Europe 2026
The PCIM Europe is the world's leading exhibition and conference for power electronics, intelligent motion, renewable energy, and energy management.
electronica India 2026
electronica India brings together global electronics manufacturers, visionaries, and innovators from the world over to shape the future of technology.
Littelfuse to Release First Quarter Financial Results Before Market Open on May 6
Littelfuse, Inc. (NASDAQ: LFUS), a leader in developing smart solutions that enable safe and efficient electrical energy transfer, announced today...
Littelfuse/C&K Introduces TDB Series Ultra-Miniature Half-Pitch Surface-Mount DIP Switches
New gold-plated, washable DIP switches enable high-density PCB layouts in space-constrained designs.