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Sr. New Product Development Engineer, ICP

Littelfuse · Champaign, IL · $88,500–$137,100 a year · Full time

Posted Sep 8, 2026 · We last checked this listing on Oct 6, 2026

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Likely interview questions for this role

Written from this job description, not a generic list. Each one notes what the interviewer is really checking.

About your past

Tell me about a product that failed validation late in development. What did you do?

What they are checking: Whether they handle late failures with clear analysis and honest schedule communication.

How do you manage a development project when you don't control the people on it?

What they are checking: Whether they lead cross-functional teams through influence and clear planning.

Tell me about a time you killed or redirected a project you had worked hard on.

What they are checking: Whether they put good outcomes ahead of attachment to their own work.

What would you do

Marketing wants a smaller part with a higher rating on a schedule you think is unrealistic. How do you respond?

What they are checking: Whether they can negotiate scope and timing using data instead of just saying yes or no.

About the work

You'd lead development of new circuit protection products. Walk me through a fuse you designed from concept to production.

What they are checking: Whether they have real fuse design experience across the full product life cycle.

What drives a fuse's time-current characteristic, and how do you design for a specific one?

What they are checking: Whether they understand the physics of element design, materials and heat behind fuse performance.

How do you evaluate a new material or technology before betting a product on it?

What they are checking: Whether they test and de-risk emerging technologies carefully before committing a program to them.

Which standards, like UL or IEC, have you designed products to meet?

What they are checking: Whether they know the certification requirements that circuit protection products must pass.

How do you work with manufacturing so a design can be built at scale?

What they are checking: Whether they design for manufacturability early, not after the first production problems.

How do you document a design so another engineer can support it after launch?

What they are checking: Whether they leave products supportable with clear design records and test data.

Practice this interview out loud.

Offer builds a real interview for this exact role at Littelfuse from your resume and this job description, asks the questions one at a time, and tells you what landed. The first one is free.

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The full job description

As published by Littelfuse.

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. Job Summary Littelfuse is seeking an experienced Senior NPD (New Product Development) Engineer to lead the development, design, validation, and introduction of innovative circuit protection products. This role will drive new technology initiatives, evaluate emerging materials and technologies, and support the full product development lifecycle from concept through commercialization. The ideal candidate brings deep expertise in fuse design and circuit protection products, combined with strong project management and cross-functional collaboration skills. About Your Role • Lead the design, development, testing, and commercialization of new circuit protection products. • Develop and evaluate new product concepts, prototypes, and engineering solutions. • Create mechanical specifications, engineering drawings, design documentation, and cost estimates. • Conduct product verification and validation activities, including test plan development and execution. • Analyze test results and identify opportunities for product performance improvements. • Drive continuous improvement initiatives focused on cost reduction and product optimization. • Research new materials, technologies, and industry trends to identify opportunities for innovation. • Procure samples, build prototypes, and perform testing to validate design concepts. • Prepare technical reports, recommendations, and project updates for stakeholders. • Collaborate with manufacturing, quality, and cross-functional teams to ensure successful product launches. • Interface directly with customers to understand application requirements and develop effective product solutions. • Participate in project reviews and provide regular progress updates to leadership and project teams. • Support compliance with industry standards and third-party certification requirements. About You • Bachelor's degree in Electrical Engineering, Mechanical Engineering, or equivalent technical experience. • Minimum of 10 years of experience designing electrical power fuses, fuse accessories, or related circuit protection products. • Strong knowledge of fuse design principles and circuit protection technologies. • Understanding of industry standards, certification requirements, and third-party approval processes (UL or equivalent). • Experience working within manufacturing environments and product industrialization processes. • Proven project management experience with the ability to lead multiple development activities simultaneously. • Proficiency with Microsoft Office applications, including spreadsheets and documentation tools. • Experience using AutoCAD, Inventor, or similar 2D/3D CAD software. • Strong analytical, problem-solving, and product testing capabilities. • Ability to collaborate effectively across engineering, operations, quality, and customer-facing teams. • Medium Voltage Fuse experience is preferred. • Strong communication skills and ability to work in a global, cross-functional environment. Littelfuse is an equal opportunity employer committed to empowering every associate to make a difference — everywhere, every day. #LI-VPGM 

Artificial intelligence (AI) tools may be used in some portions of the candidate review process for this position, however, all final employment decisions will be made by a person. Salary Range: $88,500 - $137,100 The salary offered will vary depending on your location, job-related skills, knowledge, and experience. 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.

Apply at Littelfuse