The D1U4CS-W-2200-12-HA4C ac/dc front-end power supply for hot-swapping redundant systems carries a Climate Savers' 80+ Gold efficiency rating. The 2.2-kW, PFC supply provides a main output of 12V and a standby output of 5V. It resides in a 1U enclosure measuring 355.6 mm x 101.6 mm x 41 mm and integrates variable speed cooling fans. Other features include N+1 redundancy including hot-docking. If necessary, four units can be packaged into an optional 19”, 1U power shelf to provide up to 8.8 kW of power. MURATA POWER SOLUTIONS INC., Mansfield, MA. (508) 339-3000.