Littelfuse, a diversified industrial technology manufacturer, is committed to fostering a sustainable, connected, and safer world. With a presence in over 20 countries, the company delivers cutting-edge solutions across industrial, transportation, and electronics markets. Headquartered in Chicago, Illinois, Littelfuse has been at the forefront of innovation and technological advancement for over 95 years, driving progress and strengthening communities worldwide.
Littelfuse designs and manufactures industrial technology solutions that ensure the safe and efficient transfer of electrical energy. The company’s portfolio includes fuses, relays, semiconductors, switches, sensors, and other critical components. With state-of-the-art manufacturing facilities and advanced technologies, Littelfuse delivers innovative, high-quality solutions to over 100,000 customers worldwide.
Circuit Protection: Littelfuse is a global leader in circuit protection, offering a wide range of components to safeguard electrical and electronic systems from overcurrent, overvoltage, and short circuits.
- Fuses and Fuse Holders - Protect electrical circuits from excessive current and short circuits.
- TVS Diodes and Varistors - Provide surge protection against voltage spikes.
- ESD Protection Devices - Safeguard sensitive electronics from electrostatic discharge.
- PPTC Resettable Fuses - Offer overcurrent protection with automatic reset functionality.
- Thyristors & Gas Discharge Tubes (GDTs) - Used in telecom, industrial, and consumer electronics for surge protection.
Power Semiconductors: The company provides high-performance power semiconductor solutions to improve efficiency and power management in industrial and automotive applications.
Switches and Control Products: Littelfuse designs high-reliability switches and control devices for industrial, automotive, and electronic applications.
- Electromechanical & Solid-State Relays - Enable efficient power switching in industrial automation and HVAC systems.
- Toggle, Pushbutton, and Rocker Switches - Used in automotive, industrial, and consumer electronics.
- Reed Switches & Sensors - Detect motion, proximity, and magnetic fields in industrial and automotive applications.
- Hall Effect Sensors & Proximity Sensors - Provide contactless sensing for precise control.
Sensors & Sensing Solutions: The company offers a range of sensors for industrial, automotive, and electronics applications to monitor and control environmental and operational conditions.
- Temperature Sensors - Monitor and control thermal conditions in power electronics and HVAC systems.
- Current and Voltage Sensors - Ensure efficient power management in energy systems.
- Magnetic and Proximity Sensors - Enable precise motion control in automation and transportation.
Industrial & Electrical Safety Solutions: Littelfuse provides critical safety products for industrial electrical systems, helping prevent electrical hazards such as arc flash, ground faults, and overloads.
- Arc-Flash Relays and Protection Devices - Minimize the risk of electrical fires and equipment damage.
- Ground Fault Protection Devices - Detect and prevent leakage currents in industrial and commercial systems.
- Surge Protection Devices (SPDs) - Safeguard electrical infrastructure from transient overvoltage.
- Motor Protection Relays - Ensure safe and efficient operation of industrial motors.
Automotive Solutions: The company supplies advanced automotive electronics components, supporting the transition to electric vehicles (EVs) and smart mobility.
Renewable Energy & E-Mobility Solutions: Littelfuse’s products play a crucial role in the renewable energy and electric mobility industries, offering high-performance power and protection components for solar, wind, and EV infrastructure.
- Solar Fuses and Protection Devices - Enhance safety and reliability in photovoltaic (PV) systems.
- Energy Storage and Power Conversion Components - Optimize battery management in grid storage and EVs.
- EV Charging Infrastructure Components - Support fast charging stations with efficient power solutions.
Littelfuse accelerates growth in key markets such as renewables, e-mobility, industrial safety, and power semiconductors through strategic acquisitions. By combining these investments with cutting-edge product development, the company enhances its global infrastructure and delivers greater value to its customers. In 2023, Littelfuse acquired Western Automation, a leading designer of electrical shock protection devices used in e-mobility and industrial safety applications. This acquisition strengthened Littelfuse’s portfolio of advanced safety solutions. Littelfuse's acquisition of C&K Switches in 2022 expanded its portfolio of high-performance electromechanical switches, strengthening its presence in industrial, transportation, aerospace, and datacom markets. In 2021, Littelfuse acquired Carling Technologies, a renowned manufacturer of switching, circuit protection, and power distribution solutions for marine, transportation, and industrial markets. This acquisition expanded Littelfuse’s portfolio of ruggedized electrical components, enhancing its ability to deliver high-quality power management and safety solutions for demanding applications.
Littelfuse’s innovative products are manufactured in world-class facilities using cutting-edge technologies, resulting in forward-thinking solutions for its end customers.
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