The IBM 01AC403 is a high-efficiency (HE) AC power supply designed to deliver reliable and efficient power to IBM's range of servers, storage systems, and networking equipment. Engineered to meet the demanding power requirements of high-performance computing environments, this power supply unit (PSU) is built to ensure uninterrupted operation and optimal energy efficiency. The HE designation underscores its ability to minimize power wastage and reduce operational costs through improved power conversion efficiency. It is especially suited for data centers and enterprise IT infrastructures that prioritize energy efficiency without compromising on reliability or performance. Robust and durable, the IBM 01AC403 AC power supply is a testament to IBM's commitment to quality hardware solutions, providing a solid foundation for powering critical IT equipment and supporting business continuity.