Delta’s ESR-4850F B is a compact and very reliable family of front-end modules offering max 2800W at the output. These UL Listed ESR Series Plug-in modules are rated at 50 Amps for -48VDC operation. The front-to-back fan cooling allows very compact dimension. The high power density, lightweight design, allows you to equip up to 6 rectifier modules per 23-inch rack-mounted shelf. These features afford you the flexibility to meet both today’s power requirements and future growth as you increase your network demands.