The LOP-300-48 from Mean Well USA is chassis mount AC/DC open frame power supply (PSU) with 1 Output: 48 V, 3.8 A. This power supply has 80 to 264 VAC or 113 to 370 VDC input voltage range, 182 W power, 4 kV isolation voltage and 94% efficiency. Dimensions of this PSU are: 4.00" L x 2.00" W x 1.00" H (101.6mm x 50.8mm x 25.4mm). Operating temperature range is from -40°C to 80°C (with derating).