HP Modular PDUs have a unique modular architecture designed specifically for data center customers who want to maximize power distribution and space efficiencies in the rack. Modular PDUs consist of two building blocks - the Control Unit (core) and the Extension Bar(s) (sticks). The Control Unit is 1U/0U, and the Extension Bars mount directly to the frame of the rack in multiple locations. Available models range from 16A to 40A current ratings, with output connections ranging from four outlets up to 36 outlets. With four new Control Unit (core) only models available, customers now have an even more modular, scalable offering of Modular PDUs to choose from. They may still be used with existing Extension Bars (sticks), but offer the added flexibility of just utilizing the four (4) IEC 320 C-19 outlets in the core for applications like the HP BladeSystem p-Class 1U power enclosure.