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.

Our Product Reliability Engineer (f/m/d) has a strong focus on product-related reliability across the full product lifecycle. In this Position you will be responsible for defining and managing qualification concepts and product-specific reliability requirements, ensuring that application conditions, customer expectations, and industry standards are translated into robust and technically sound qualification strategies.

The role focuses on product performance, failure mechanisms, and lifetime behavior and is closely aligned with R&D, Product Engineering, and Customer Quality. It includes the ownership of qualification plans and the interpretation of reliability results, while ensuring alignment with global test standards and execution capabilities.

About the Position:

• Definition of global reliability strategies, qualification concepts, and methodologies including test scope, stress conditions, and sample sizes required to demonstrate product reliability

• Definition and ownership of product-specific qualification plans based on application requirements, customer expectations, and industry standards such as JEDEC, IEC, and AECQ 

• Definition of product-specific test requirements and justified deviations based on global test specifications and mission profiles 

• Evaluation and interpretation of reliability test results in relation to product performance, application conditions, and customer expectations, including structured disposition and risk mitigation approach for qualification failures 

• Analysis and understanding of failure mechanisms, including degradation behavior, physics-of-failure, and correlation to product design and stress conditions 

• Development and application of lifetime and acceleration models, including wear-out mechanisms and extrapolation approaches 

• Definition of reliability concepts, decision logic, and product-specific best practices based on product requirements and global standards 

• Alignment of qualification requirements with lab capabilities, including feasibility, capacity, cost, and timeline 

• Close collaboration with Project Management, R&D, Product Engineering, Customer Quality, and Global Quality Labs 

• Participation in project decision gates and reviews, providing reliability recommendations 

• Ownership of reliability KPIs at product and program level, including definition, monitoring, and continuous improvement (e.g. qualification robustness, failure rates, lifecycle performance) 

• Responsibility for robust reliability strategies and programs across the product lifecycle, including new product development, change management, and ongoing reliability monitoring 

• Consolidation and communication of reliability findings and contribution to continuous improvement

About You:

• Degree in Electrical Engineering, Physics, Materials Science or Comparable

• Minimum of 10 years of experience as Product Reliability Engineer in the high-power semiconductor Industry

• Strong experience in semiconductor or electronic component reliability

• Deep understanding of semiconductor failure mechanisms, degradation behavior, and reliability testing principles

• Strategic and structured working style

• Ability to multi-task, prioritize and work in a high-pressure environment

• Fluent verbal and written communication skills in English

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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.