550W hot-swappable redundant PSU, direct replacement for WJ829/D9761/MY064; Universal 100-240V AC auto-ranging input for global server deployments; Single 12V rail stable output, ideal for Dell PowerEdge 1850 rack servers; Full protections (OVP/OCP/SCP/OTP) & active PFC for safe 24/7 operation; Tool-less hot-swap design, supports N+1 redundancy for zero downtime