The increasing complexity and variability of power electronics systems pose significant challenges for their reliability. At the same time, the growing interest in Artificial Intelligence (AI) techniques promises to provide new tools for design optimization, monitoring and control, and system life-cycle performance improvement. They represent how the performance requirements and methodologies in power electronics are involving. This focus topic will explore the reliability of power electronics components and systems, and the application of AI in power electronics, highlighting the state-of-the-art academic research and industry innovation, and the challenges and opportunities that this exciting area of research presents. The performance requirements and methodologies in design, control, and maintaince of power electronic components and systems are evolving. The focus topic will bring together leading academic researchers and industy experts through a keynote on Circular Economy in Power Electronics, a Tutorial on Reliability and Prognositics Towards Lifetime Improvement of Automotie Power Electronics, one lecture session and one dialogue session, and an industrial forum.