AC/DC 550W Open Frame Power Supply LOF550-20Bxx Series

SKU: LOF550-20Bxx Categories: , , Manufacturer:

Product specs

Weight 490 g
Dimensions 127 × 76.2 × 40.5 mm
Input Range

90-264Vac, 127-370Vdc


499.2W, 499.5W, 499.7W, 500.4W, 549.6W, 550W, 550.8W


12V, 15V, 18V, 19V, 24V, 27V, 36V, 48V, 54V


10.2A, 11.46A, 15.3A, 20.4A, 22.9A, 26.3A, 27.8A, 33.3A, 41.6A

Min-Max Tamb (°C)

-40°C, +70°C

Product Description

LOF550-20Bxx series is one of Mornsun’s AC-DC miniaturize open frame power supply and is suitable for all kinds of BF type (be accessible to patients) medical system equipment. It features universal AC input and at the same time accepts DC input voltage, cost-effective, low no load power consumption, high efficiency, high reliability and double or reinforced insulation. These converters offer excellent EMC performance and meet IEC/EN/UL62368, GB4943, IEC/EN60335, IEC/EN61558, IEC/EN/ES60601-1 standards and they are widely used in areas of industrial, LED, street light control, electricity, security, telecommunications, smart home, etc.


*Under any conditions, the total power of the product should not exceed the rated power. When the output voltage is increased, the total output power cannot exceed the rated output power, when the output voltage is decreased, the output current cannot exceed the rated output current;

*When measuring the full load efficiency, the fan should be connected to an external power supply. Fan loss is not included in the input power;

*LOF Products with shell is also available, named LOF550-20Bxx-C/CF.

  • Universal 90 – 264VAC or 127 – 370VDC input voltage
  • Compact size 5” × 3”
  • Operating ambient temperature range: -40℃ to +70℃
  • Built-in active PFC function
  • Output short circuit, over-current, over-voltage protection, over-temperature protection
  • 320W with air cooling, 550W with 25CFM
  • 5VDC standby output, 12VDC fan supply
  • PG signal and remote sensing function
  • Medical approved, suitable for BF application
  • The base plate with conformal coating
  • Operating altitude up to 5000m

Available Options: