Ac-Dc power supplies carry IEC 60601-1 4th edition approvals for medical applications

CUI’s Power Group is introducing five new open frame series, ranging from 180W up to 550W, to its line of internal ac-dc medical power supplies.

Certified to the medical 60601‑1 edition 3.1 safety standards for 2 x MOPP applications and 4th edition EMC requirements, the VMS‑180, VMS‑225, VMS‑275, VMS‑350, and VMS‑550 series feature high efficiency up to 94% and high power densities up to 30 W/in3.



The new models are housed in 2 x 4 inch (50 x 101mm) and 3 x 5 inch (76 x 127mm) packages with profiles measuring as low as 0.75 inches (19mm), providing a compact, high density solution for medical diagnostic equipment, medical monitoring devices, and dental applications.

All of the new VMS series provide output voltage options from 12 to 58Vdc, feature wide universal input voltage ranges from 80 to 264Vac, and offer no-load power consumption as low as 0.5W.

The 180W to 550W models also carry an input to output isolation of 4200Vac with leakage current ratings as low as 0.3 mA at 230 Vac.

Operating temperatures range at full load from -40 up to +50°C with forced air cooling, derating to 50% load at +70°C.

Additional features include protections for over voltage, over current, and short circuit, power factor correction, and a 12 Vdc/500 mA fan output.

These medical power supplies further meet EN 55011 Class B limits for conducted and radiated emissions and achieve an MTBF of 3.37 million hours, calculated per Telcordia SR-332 Issue 3.