The EFRD-S2257HPM, manufactured by Etasis Electronics, is a 1U slim redundant PSU. It has a power rate of 250 W with ATX outputs. It also has a high efficiency greater than 80%, a PMbus support and a dimension of 106(W) x 41.5(H) x 260(D) mm. Furthermore, it has an operating working temperature of 0 - 50℃.