VMS-550C-48-CFS

The VMS-550C-48-CFS is a high-performance open-frame AC/DC power converter manufactured by CUI Inc. Designed for demanding environments, this unit delivers a maximum output power of 550W at a nominal 48Vdc, supporting up to 11.46A of continuous current. It accepts a wide universal input range of 90 to 264Vac or 127 to 370Vdc, with an operating frequency of 47 to 63Hz. The converter achieves a typical efficiency of 94% at 230Vac and incorporates active power factor correction to maintain a power factor above 0.95 across full load conditions.

Engineered for reliability, the VMS-550C-48-CFS operates within a temperature range of -40°C to 70°C with derating. It provides comprehensive protection mechanisms including over-voltage, over-current, short-circuit, and over-temperature protection, all featuring automatic recovery. The hold-up time is guaranteed at a minimum of 10ms under both 115Vac and 230Vac inputs. Line regulation is maintained within ±0.5%, and load regulation stays within ±1% from zero to full load.

The physical footprint measures 160.0mm x 86.0mm x 43.0mm (6.30" x 3.39" x 1.69"), conforming to a standard 3-inch by 5-inch open-frame layout. This form factor facilitates straightforward integration into custom enclosures or chassis mounting. Thermal management supports 320W under natural convection and scales to the full 550W rating with forced airflow. Additional design features include adjustable output voltage, remote sensing capabilities, a 5V standby rail, a dedicated 12V fan connector, and a power good signal.

Certified to the IEC 60601 safety standard and suitable for BF applied parts applications, this converter is well-suited for medical equipment, industrial automation, telecommunications, and test instrumentation. Its robust electrical characteristics and compact mechanical design make it an ideal choice for systems requiring reliable, high-density power conversion in space-constrained environments.