Economical open frame AC/DC power supplies deliver up to 280W in compact package

CUI has expanded its VOF open frame AC-DC power supply family with the introduction of 185W, 225W and 280W models. The VOF-185, VOF-225 and VOF-280 series are higher-power additions to the company’s latest-generation open frame AC-DC power portfolio ranging from 6W to 150W. Designed to offer a combination of economy and performance in a compact, industry standard 3” x 5” footprint, the single output power supplies deliver efficiencies up to 91% and no-load power consumption as low as 0.5W at 230Vac for energy-conscious ITE, industrial and consumer electronics applications. The three new series feature a wide universal input voltage range of 90VAC to 277VAC and offer output voltage options of 12VDC, 15VDC, 24VDC, 36VDC and 48VDC. All models provide an operating temperature range at full load from -20C up to +50C with forced air cooling, derating to 50% load at +70C. The new power supply family also carries UL/cUL and TUV 60950-1 safety certifications while meeting EN 55022 Class B and FCC Class B limits for radiated emissions. The series has an MTBF of 250,000 hours minimum at full load at 25C ambient, calculated per MIL-HDBK-217F. Protections for over voltage, over current and short circuit are included as well as 0.98 typical power factor with active PFC.