The telecom rectifier systems accept input voltage from 85Vac to 300Vac generates 48Vfor telecom applications. The operating temperature range is -40oC to 75 oC. Depends on power and features required, the standard products come in the 1U to 11U size fitted for 19 inch racks. You can get the standard off the shelf rectifier systems or get the rectifier modules and control units from us to build the system by yourselves. We can also provide tailor made systems for customers. Please let us know your requirements and we shall come back with a solution shortly.