Cisco PWR-C2-640WAC enterprise networking (router/Catalyst switch/UCS families) Power Supply

The Cisco PWR-C2-640WAC is a 640W AC power supply built to the “Config 2” power-bay layout, the higher-wattage sibling of the 250W PWR-C2-250WAC in the same supply family, sized for Catalyst switches carrying a larger PoE budget or higher total port density. Config 2 switches typically support dual supplies for N+1 redundancy, so this unit is often ordered to restore that redundancy after a failed or removed supply as much as to meet a higher power draw. Confirm your switch model’s total power and PoE requirement before ordering, since fitting a lower-wattage Config 2 supply where 640W is actually needed will not meet the switch’s PoE budget. Tech-Star (UK-based, shipped worldwide) supplies Cisco Catalyst power supplies to keep PoE switch capacity fully provisioned.