Introducing Residual Current Protection
Western Automation products are now on Littelfuse.com. Discover advanced protection solutions for safer EV charging systems.
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Littelfuse Acquires Basler Electric
Their expertise and long history in power protection and control solutions strongly complement the Littelfuse portfolio in energy and industrial infrastructure markets.
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Learn Temperature Sensor Essentials
Explore expert resources on temperature sensors—design tips, tutorials, and educational content to boost your knowledge and improve sensor applications.
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Electric Two and Three Wheeler Solutions
Littelfuse provides advanced circuit protection and sensing solutions for Li-ion battery systems in two-and three-wheeler electric vehicles.
Learn MoreFeatured Products
Low Profile Solution
SRP1-KC Half the Thickness of Traditional SSRs
Compact, low-profile (12.5mm) design with zero cross and instantaneous switching plus integrated varistor protection.
Four Solid-State Relays in ONE
SRP4-CC Space Saving Solution Controls Multiple AC Loads
Compact 4-pole design with zero cross switching and 25A output per pole.
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.
TVS Diode: DFNAK3 Series
Space-Saving, High-Surge Protection for DC and PoE Lines
Delivers robust surge protection, lower clamping voltage, and PCB space savings. Ideal for telecom dc power, power over ethernet, industrial automation, and data center infrastructure applications.
Cartridge Fuse: 828/827 Series
Compact, AEC-Q200 Fuses for High-Voltage EV Systems
High-interrupting capacity cartridge fuses designed for EV onboard chargers, power distribution units, and high-voltage automotive electronics requiring compact, reliable overcurrent protection.
TVS Diode: SZSMF6L Series
Fast-Response TVS Protection for Automotive Electronics
Automotive-grade TVS diodes. Ideal transient voltage suppression for EV powertrains, battery management systems, onboard chargers, and automotive lighting.
Isolated Gate Driver: IX3407B
Fast, Compact Gate Driver with Built-in Protection Features
Supports Si/SiC MOSFETs and IGBTs with separate outputs, UVLO, and Active Shutdown. Optimized for motor control, solar inverter efficiency, and industrial power conversion reliability.
MCASE 4-Way
32 V 160A Max Fuse Holder
A compact, high-performance solution designed to support up to four MCASE+® slotted cartridge fuses and features a bussed power input and individually wired fuse outputs.
Affordable High Performance
SRP1-CE Series Solid State Relays
The SRP1-CE Series: perfect for demanding areas with IP20 removable protection for safety & easy maintenance. Ideal for HVAC and industrial ovens, it balances cost-effectiveness with high performance.
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.
Littelfuse Reports Fourth Quarter and Full Year 2025 Results
Fourth Quarter Highlights: (Year-over-year comparisons unless otherwise noted) Net sales of $594 million, +12%; organic growth contributed +7% Cash...
Littelfuse to Release Fourth Quarter Financial Results Before Market Open on January 28
Littelfuse, Inc. (NASDAQ: LFUS), a leader in developing smart solutions that enable safe and efficient electrical energy transfer, announced today...