Check Distributor Stock Instantly
Easily check distributor stock for Littelfuse products in real time. Find availability from authorized distributors and get the parts you need—fast and hassle-free.
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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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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
CPC2501M Solid-State Relay
Doorbell Chime Bypass IC with Built-in SSR
Compact IC with integrated SSR enables simple bypass of doorbell chimes for 8–24 V AC smart doorbells. No microcontroller (MCU) required—ideal for tight-space IoT and security designs.
IXSJxxN120R1 SiC MOSFET
High-Efficiency for Power-Dense Designs
Isolated 1200 V SiC MOSFET in TO247-3L package delivers low RDS(on), minimal losses, and thermal performance for industrial drives, DC/DC converters, and renewable energy systems.
5.0SMDJ-FB Foldbak™ TVS Diode
Low-Voltage Clamping for Robust DC Protection
TVS diode with Foldbak™ technology and 5000 W rating, delivers exceptionally low clamping voltage and enhanced surge protection for PoE, power supplies, and ICT systems.
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.
Simple Heating Applications
SRP1-ME Series Solid State Relays
The SRP1-ME Series offers affordable heating solutions with industrial-grade quality and compact design, ideal for tight spaces. Features zero cross switching for less noise and meets safety standards.
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.
DC Output Applications
SRP1-CC Series Solid State Relays
SRP1-CC Series: ideal for DC output applications. Uses MOSFET technology and offers efficient switching with low power dissipation. Use with DC heaters and solenoid valves.
Empowering a Sustainable, Connected, and Safer World
Solutions Spotlight
How to Size Fuses for PV Systems
Use correct solar fuses to ensure safety. Wrong or non-Photovoltaic (PV) types can reduce reliability and increase risk.
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.
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.
Partnership Opportunities in Drug Delivery (PODD) 2025
Pharma, biotech, and drug delivery industries to assess delivery needs, explore partnerships, and discuss innovative drug delivery technologies.
IEEE Long Island Power Symposium
This annual premiere event brings together the area's brightest minds of the power industry.
Littelfuse Launches First Reflow-Compatible Illuminated Tactile Switch with SPDT and Long Travel
New K5V Series switches combine LED backlighting, gold-plated reliability, and compact, dust-resistant design—now with high-temperature PAR...
Littelfuse Introduces Space-Saving Solid-State Relays
Delivers compact and reliable operation for component density critical applications.