The LOP-400-48 from Mean Well USA is chassis mount AC/DC open frame power supply (PSU) with 1 Output: 48 V, 5.3 A. This power supply has 80 to 264 VAC or 113 to 370 VDC input voltage range, 254 W power, 4 kV isolation voltage and 95% efficiency. Dimensions of this PSU are: 5.00" L x 3.00" W x 1.08" H (127.0mm x 76.2mm x 27.5mm). Operating temperature range is from -40°C to 80°C (with derating).