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The VMS-450C-24 from CUI Inc. is an open frame AC/DC converter designed for medical and industrial applications. It provides a single 24V output with a maximum current of 18.75A. Under forced air cooling (25 CFM), it can deliver up to 450W; under natural convection, the output is derated to 250W.
The converter accepts a wide input voltage range of 90-264 VAC or 127-370 VDC with a frequency of 47-63 Hz. It features active power factor correction (0.98 typical at 115 Vac full load) and high efficiency up to 93%. Output voltage is adjustable from 22.8 to 25.2 Vdc. Protection features include over current protection (105% min), short circuit protection (hiccup mode, auto recovery), and over temperature protection (output shutdown, auto recovery). Ripple and noise is 200 mVp-p maximum.
The unit has a compact 3x5 inch footprint with dimensions 127.0 x 76.2 x 38.5 mm. It is chassis mountable and operates over -40 to 70°C with derating. It is certified to IEC 60601-1 for medical safety and designed to meet 60335 and 61558 standards. Approvals include CE, cURus, and UKCA. The converter also provides auxiliary outputs: 5V standby and 12V fan output, along with power good and remote sense signals.
The input voltage range is 90-264 VAC or 127-370 VDC.
The output voltage is 24 Vdc with a maximum current of 18.75 A.
With forced air cooling (25 CFM), the maximum output power is 450 W. Under natural convection, it is 250 W.
The operating temperature range is -40 to 70 °C with derating.
It is an open frame package designed for chassis mount.
It is certified to IEC 60601-1 (medical) and designed to meet 60335 and 61558. Approvals include CE, cURus, and UKCA.
Yes, it features active PFC with typical power factor of 0.98 at 115 Vac full load.