The HPE 865408-B21 is a high-efficiency 500-watt power supply designed for HPE ProLiant servers, delivering 94% platinum-level energy efficiency to reduce operational costs and heat generation. Its hot-pluggable design enables maintenance without server downtime, while the flexible slot architecture ensures broad compatibility across HPE server platforms. The low halogen construction meets environmental compliance standards, and the redundant power capability provides critical system reliability for mission-critical applications. This power supply combines cost-effective operation, simplified maintenance, environmental responsibility, and enterprise-grade reliability in a single solution.