# Littelfuse

> Littelfuse is a Chicago-area manufacturer that has spent nearly a century making the small, unglamorous parts that stop electricity from destroying the things it powers. Founded in 1927 to protect vacuum-tube radios, it now sells fuses, power semiconductors, relays, switches and sensors into cars, data centers, solar farms, EV chargers and factory floors across more than 150 countries. It is a roughly $2.4 billion-a-year business built on a simple promise: when current spikes, its part fails first so nothing else does.

- **Founded:** 1927
- **Headquarters:** Chicago, Illinois, United States
- **Founders:** Edward V. Sundt (Founder), Edwin O. Sundt (Co-founder), Joseph W. Thomas (Co-founder)
- **Team size:** ~17,000 associates across more than 20 countries
- **Products:** Fuses and Circuit Protection, AutoFuse Blade Fuse, Power Semiconductors, Relays, Switches and Connectors, Sensors
- **Notable:** Invented the first blade-type automotive fuse (AutoFuse) in 1976, now an industry standard., Grew from a $5,000 startup in 1927 to roughly $2.4 billion in annual revenue., Products sold in more than 150 countries with ~17,000 associates.

## Products & services

- **Fuses and Circuit Protection** — Fuses, gas discharge tubes, TVS diodes, varistors, PTCs and ESD suppressors that interrupt or divert excess current and voltage to protect downstream electronics.
- **AutoFuse Blade Fuse** — The first blade-type automotive fuse, developed by Littelfuse in 1976 and now a global standard inside vehicle fuse boxes.
- **Power Semiconductors** — Discrete semiconductors, thyristors, IGBTs and power modules used in EV drivetrains, solar inverters, and industrial power conversion.
- **Relays, Switches and Connectors** — Electromechanical and solid-state switches, protection relays and connectors for commercial vehicles, industrial and grid applications.
- **Sensors** — Position, speed, temperature and current sensors for automotive safety systems, HVACR and industrial equipment.

## Achievements

- Invented the first blade-type automotive fuse (AutoFuse) in 1976, now an industry standard.
- Grew from a $5,000 startup in 1927 to roughly $2.4 billion in annual revenue.
- Products sold in more than 150 countries with ~17,000 associates.
- Publicly traded on NASDAQ as LFUS and a component of the S&P MidCap 400.
- Completed the acquisition of Basler Electric (~$350M) in late 2025 to expand in industrial power.

## Latest updates

- **2026-02** — Reported Q4 and full-year 2025 results with revenue of about $2.39 billion; Q4 included a $301 million non-cash goodwill impairment tied to the semiconductor product business amid soft market conditions.
- **2025-11** — Closed the acquisition of Basler Electric for approximately $350 million to strengthen its position in high-growth industrial power markets.
- **2025-10** — Reported Q3 2025 net sales of $625 million, up about 10% year over year, led by electronics and industrial segments.
- **2025-02** — Dr. Greg Henderson appointed President and CEO, effective February 10, 2025.

## Links

- Website: https://littelfuse.com
- LinkedIn: http://www.linkedin.com/company/littelfuse
- Twitter/X: https://twitter.com/Littelfuse
- YouTube: https://www.youtube.com/user/Littelfuse
- Facebook: https://facebook.com/Littelfuse

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Profile page: https://yespress.io/littelfuse
Published by YesPress — https://yespress.io
Last updated: 2026-08-20