Littelfuse (NASDAQ: LFUS) is a diversified industrial technology manufacturing company shaping solutions for the safe and efficient transfer of electrical energy.
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Headquartered in Chicago, Illinois, USA, we serve customers across industrial, transportation, and electronics markets worldwide.
With approximately 16,000 employees we design and manufacture innovative technologies that support electrification, energy efficiency, and advanced automation.
Our general reach is matched by a culture that empowers innovation and long‑term growth.
Guided by our principles We Care, We Succeed With Our Customers, and We Own the Outcome, we work collaboratively, think boldly, and deliver solutions that move industries forward.
Littelfuse is seeking a motivated Electrical Engineer in San Sebastián, Spain, to support the design and development of innovative solid‑state protection and control products.
Working as part of a multidisciplinary engineering team, you will contribute to product development activities from concept through validation and release to manufacturing.
This role offers an excellent opportunity for an engineer looking to expand their expertise in power electronics, embedded systems, and protection technologies while working on products that help make electrical systems safer and more efficient.
- About the job: Support the design, development, and testing of electrical circuits and electronic systems.
- Create schematics, perform circuit simulations, and assist with PCB development activities.
- Participate in laboratory testing, data collection, and troubleshooting of prototypes.
- Collaborate with hardware, firmware, mechanical, and manufacturing engineers.
- Assist with product validation, qualification testing, and documentation.
- Support component selection, supplier evaluations,



and engineering change activities.
- Contribute to design reviews and continuous improvement initiatives.
- Help ensure products meet performance, quality, and regulatory requirements.
- About you: BS or MS degree in Electrical Engineering.
- 5+ years of experience in electrical or electronic product development.
- Experience with analog and digital circuit design.
- Basic understanding of microcontrollers, embedded systems, or power electronics.
- Familiarity with laboratory equipment and engineering test methods.
- Experience using schematic capture and electronic design tools.
- Strong analytical and troubleshooting skills.
- Ability to work effectively in a collaborative team environment.
- Good communication skills and eagerness to learn.
- Nice to Have Knowledge of current sensing technologies or protection systems.
- Exposure to EMC, safety, or regulatory testing.
- Experience supporting products through manufacturing introduction.
#LI-RK At Littelfuse, we support employee growth and development.
Guided by our culture principles, our teams work together to deliver value for customers and make a positive impact in the communities where we operate.
We are an equal opportunity employer committed to fostering an inclusive workplace where everyone has the opportunity to grow and contribute.
- We offer competitive compensation and benefits, performance‑based incentives, flexible work arrangements, and development opportunities.
Our humble roots date back to 1927, where, in the back of a garage on Chicago’s northside, our founder,



Edward Sundt, developed a small, fast‑acting, protective fuse for use in sensitive test meters.
Sundt wanted to call his new company producing these small fuses, “Little Fuse,” but wasn’t allowed to trademark two such common words.
So, instead he went with the one‑word, misspelled “Littelfuse.”
For more than 95 years, Littelfuse has pioneered innovative products that help empower a sustainable, connected, and safer world.
With the ever‑evolving electrification and electronification of customer applications, our product technologies are closely linked to sustainable applications such as electric vehicles and EV charging infrastructure, renewable energy and energy storage, factory automation, power management and more.
Throughout our history, our people have been the foundation of our success — and that remains true today.
Now more than ever, our bright and talented people are a strategic advantage for the company.
From the production line to the engineering lab, the office or distribution center, Littelfuse people are an important part of a diverse, talented team of the best and brightest in the industry.
While Littelfuse has experienced tremendous growth in recent years, we still maintain a small‑company, entrepreneurial approach where your efforts will drive our culture, our business, and the overall success of the organization. xqbhyrx
No matter where you work or what you do, your contributions will make a difference at Littelfuse — everywhere, every day.
Littelfuse is an Equal Opportunity/Affirmative Action employer.
All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, gender identity, sexual orientation, disability, protected veteran status, and/or any other protected class under federal, state, or local law.
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📌 Electrical Engineer (San Sebastián)
🏢 Littelfuse
📍 San Sebastián