Measuring 9.05" x 5.11" and 1.5" in height, the PSU-500 series 500W, open-frame power supplies offer eight single-output models with outputs of 5, 12, 13.8, 15, 24, 36, 48, and 50 Vdc. They provide remote on/off and power good signals with an auxiliary 5 VSB/ 350 mA, making them appropriate for use in a wide range of applications. For cooling, the supplies require 20 to 30 cfm of airflow for full-load operation. Convection-cooled operation ranges from 350W to 500W depending on the model. Standard features include universal ac inputs and active power factor correction for EN61000-3-2 Class D compliance. Prices start at $101.34 each in OEM quantities. DONGAH ELECOMM USA, Richardson TX. (888) 878-7331.