The IBM 42R4491 is a 300W AC Power Supply designed to provide stable and reliable power to specific IBM servers and storage systems. Engineered to meet IBM's strict performance and quality standards, this power supply unit (PSU) features advanced circuitry that ensures a consistent and uninterrupted power supply, safeguarding the system against power fluctuations and failures. With a 300-watt output, it is capable of supporting the operation of critical components, including processors, hard drives, and memory modules, ensuring they function optimally without risk of power-related damage. The PSU's energy-efficient design not only reduces operational costs but also minimizes the environmental impact by lowering power consumption. Compatible with select IBM systems, the 42R4491 is an essential component for businesses that rely on their IT infrastructure to perform efficiently and without interruption.