Lenovo 1,100 W AC PSU Gen2 4P57A78281 | Server PSU, Rack Mount

Support high-demand server platforms with this Lenovo 1,100 W AC PSU Gen2 RF module. Built for systems that require substantial power headroom, it helps maintain stable operation under load while giving technicians a fast replacement path when a supply fails. In environments where every maintenance window is measured, the ability to swap a PSU quickly can protect service levels and reduce operational risk. This unit is a strong fit for infrastructure teams that standardize on Lenovo hardware and want replacement parts that match the original platform requirements. The RF designation indicates a refurbished or certified replacement path, which can be a practical way to control costs while keeping installed systems productive. For organizations extending the life of existing servers, that balance of capacity, compatibility, and serviceability is often more valuable than buying into a lower-spec alternative. Use it to restore power redundancy, maintain uptime in production racks, and keep spare inventory aligned with deployed Lenovo systems. When the server itself still has useful life, replacing the PSU is often the most efficient way to preserve investment and avoid unnecessary refresh cycles.