HP 508155-001 300W D5 MT Power Supply

The HP 508155-001 is a 300-watt power supply unit manufactured by HP as a genuine replacement part for their D5 MT (MicroTower) desktop systems. As an OEM component, it matches the exact electrical specifications, connector layouts, and physical dimensions required by compatible HP desktops, making it a true drop-in replacement for a failed or degraded PSU. The 85% efficiency rating means this unit wastes less energy as heat compared to lower-efficiency alternatives, which translates to marginally lower electricity costs and reduced thermal stress on surrounding components over time.

This particular unit ships new and factory-sealed, which is increasingly uncommon for older HP replacement parts that are often sold as refurbished or pulled from decommissioned systems. For anyone maintaining an HP D5 MT desktop — whether in a business environment with a fleet of machines or as a personal workstation — the 508155-001 provides a reliable, brand-matched solution. It is important to note that this is not a standard ATX power supply; HP uses proprietary form factors and connector configurations, so this PSU is not interchangeable with non-HP systems or even other HP form factors.