Direct replacement for Lenovo OEM 00HV224 & Delta DPS-550AB-5 A 550W server power supply.; Full compatibility with ThinkServer RD350, RD450, RD550, RD650, TD350 rack servers.; Hot-swappable design, 80 Plus Platinum high efficiency, universal 100-240V input.; Stable 550W output with active PFC, robust +12V rail for enterprise server operation.; 100% fully tested before shipment; built-in OVP, OCP, SCP, UVP protections.