Power Supply Specs Power Output: 500 W (563 VA) Efficiency: 94% (80 PLUS Platinum certified) Form Factor: Flex Slot (plug-in module), hot-plug Input Voltage: 100–240 VAC, 50/60 Hz Connector: IEC 60320 C14 AC inlet Design: Low halogen materials Standards: UL, TUV, cUL, BSMI, CCC, KCC, CISPR Class A, C‑Tick, WEEE Cooling: Internal fan, hot‑swap support Mixing Policy: Must be same part number in server—no mixing Compatible Platforms: HPE ProLiant Gen9/Gen10/Gen11 and select Apollo systems Part Number: 865408-B21 866729‑001 This HPE 500W Flex Slot power supply delivers efficient (94%) and reliable power for HPE ProLiant and Apollo servers. Its Flex Slot design is 25% smaller than previous Common Slot modules, saving chassis space while offering hot-plug replacement without downtime. Built from low-halogen materials, it’s more environmentally friendly and helps maintain industry-standard compliance. With a wide voltage range (100–240 VAC) and platinum-level certification, this PSU minimizes power loss and boosts data center energy efficiency. The IEC C14 input and internal fan ensure quick installation and dependable cooling. Compliance with multiple international safety standards makes it suitable for global enterprise and industrial deployments.