The PB Series, AC to DC Front End Power Supply is ideal for AC to DC bulk power and DC to DC power distribution. Available in Single and Three Phase AC Input versions, the PB Series offers active three phase Power Factor Correction, N+1Current Sharing and optional -55C operation, in a low profile, conduction cooled case.PB Series power products are used Airborne, Shipboard and Ground Mobile platforms and many have National Stock Numbers (NSN’s) assigned. Consult factory for details.