Littelfuse (NASDAQ: LFUS) is a diversified industrial technology manufacturing company shaping solutions for the safe and efficient transfer of electrical energy. 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 global 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.

We’re looking for a System Engineer - Electrical & Electronic Circuit Protection to join our R&D Center in San Sebastian, Spain and play a key role in the development of next-generation industrial circuit protection products within our Industrial Circuit Protection (ICP) business.

In this role, you’ll work across electrical, electronic, mechanical and manufacturing disciplines - taking electrical sub-systems from concept and design through prototyping, validation and production.

What You’ll Do

• Design and develop electrical sub-systems for industrial circuit breakers, fuse switch disconnectors and related protection devices, from concept through validation.
• Perform electrical calculations, simulations and component selection to meet performance, safety and regulatory requirements.
• Apply system engineering principles to integrate electrical, electronic, mechanical and molding-process requirements into robust product designs.
• Support prototyping, proof-of-concept activities and design verification testing.
• Work closely with the Technology Research Manager, Prototype Center and Lab Test Center to develop and validate new solutions.
• Lead the technical aspects of new product development projects within your area of expertise.
• Collaborate with suppliers, customers, Quality, Sourcing and Manufacturing teams to select, qualify and launch components and sub-systems.
• Support benchmarking of industrial breaker technologies and use market references to inform design decisions.
• Support first-article inspections and manufacturing ramp-up, troubleshooting design-related issues during production launch.
• Work with molding engineering teams and suppliers to ensure tooling and component quality meet design requirements.
• Maintain technical documentation, calculations and test results throughout the development process.
• Help build and maintain Littelfuse expertise in industrial breaker electrical sub-systems and molding processes.
  
  
  
  

What You’ll Bring

• Bachelor’s degree in Electrical or Electronic Engineering; Mechanical Engineering with a strong background in electrical sub-system development will also be considered. Master’s degree is a plus.
• Solid, demonstrable experience in electrical sub-system design for industrial applications.
• Experience with industrial circuit breakers, fuse switch disconnectors or similar electrical protection products.
• Knowledge of electrical component selection, product standards and testing methods.
• Experience with product development cycles and Stage-Gate processes.
• Some understanding of molding processes and Design for Manufacturing would be highly valuable.
• Experience with electrical, mechanical or environmental test setups.
• APQP knowledge is a plus.
• Strong technical and problem-solving skills, with good attention to detail and organization.
• Experience working in an international and cross-functional environment.
• Excellent written and spoken English and Spanish.
  
  
  
  

Littelfuse strives to empower associate growth and development in a culture of ongoing collaboration and respect for diverse global perspectives and expertise.

Our Core Values – We Care, We Succeed With Our Customers, We Own The Outcome – support us in our mission to improve the safety, reliability, and performance of our customers’ products that use electrical energy.

We are an equal-opportunity employer that takes pride in giving every associate the means and courage to make a difference – everywhere, every day.

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.