Build more resilient switching infrastructure with the D-Link DPS-520 redundant power supply unit. Designed as a 180 W RPSU, it adds a backup power path so supported switches can continue operating through a primary supply fault, helping preserve connectivity for users, applications, and downstream systems. For teams responsible for uptime, the value is straightforward: fewer single points of failure. A redundant PSU helps contain the impact of power-related issues, which is especially important in network closets, branch sites, and production segments where a switch outage can interrupt authentication, voice, monitoring, or business traffic. The DPS-520 is the kind of component that earns its place in the bill of materials by reducing operational risk. Instead of relying on a single power source, you get a more durable deployment model that better matches the expectations of enterprise infrastructure. It is a practical choice when the cost of interruption is higher than the cost of building in redundancy from the start.