450-W, 1U, programmable, single-output, ac-dc power supplies in rack and benchtop models are available in 135 voltage ratings of 1 to 135 Vdc and current ratings to 40 A. They handle universal 95 to 265 Vac, 49- to 420-Hz input with active power factor correction (PFC) of 0.99. Units are configurable with an optional fixed auxiliary output of between 3.3 and 125 Vdc, up to 180 W. Front panel supports linear controls for precise adjustment and optional digital LED voltage and current meters.Â