Details, datasheet, quote on part number: VOF-300-12

CUI’s 300 W open-frame AC / DC power supplies are higher-power additions to CUI’s latest-generation open-frame AC / DC power portfolio. The VOF-300 series is designed to offer a combination of economy and performance in a compact, industry-standard 3" x 5" footprint. With efficiency up to 94% and no-load power consumption < 0.3 W, these power modules are ideally suited for energy-conscious ITE, industrial, and consumer electronics applications.

DatasheetDownload VOF-300-12 datasheet
VOF-300-12 photo

Others parts numbering
VOF-300-24: AC/DC CONVERTER 24V 300W
VOF-300-36: AC/DC CONVERTER 36V 300W
VOF-300-48: AC/DC CONVERTER 48V 300W


Features, Applications
For more information, please visit the product page.

to 300W continuous power universal input voltage range industry standard x 5" footprint power factor correction remote voltage sense remote on/off control fan & 5 Vdc aux outputs covered and open-frame configurations over voltage, over current, over temperature, and short circuit protections UL/cUL & TUV safety approvals efficiency to 94%

Maximum output power (5 W for Vstb) with 10 CFM forced air, (3 W for Vstb) with convection cooling. At full load, nominal input, 20 MHz bandwidth oscilloscope, output terminated with 10 F electrolytic and 0.1 F ceramic capacitors. At full load, 25C, 230 Vac input. Standby output voltage. Present on all models. All specifications are measured Ta=25C, 230 Vac input voltage, and 60% rated output load unless otherwise specified.

Base Number Output Voltage Chassis: "blank" = open-frame CNF = covered Input Connector: "blank" = TAIWAN KING PIN TERMINAL PVHI series 1 = LONG CHU P3060 series

parameter voltage frequency current inrush current leakage current power factor correction no load power consumption meets EN 61000-3-2 measured with the PS-ON signal configured to OFF at 100 Vac at 240 Vac at 240 Vac, 25C, cold start conditions/description min 90 47 typ max units Vac A mA

parameter conditions/description at 115/230 Vac, full load 12 Vdc output models 24 Vdc output models 36 Vdc output models 48 Vdc output models at full load, 25C Vo Vstb high line to low line at full load Vo Vstb from full to 10% load Vo Vstb at 115 Vac built in trim pot (VR) at full load PS-ON = 0V PS-ON 60 0.05 power on PS-ON signal1 power off power good (PG) standby output voltage fan output

load regulation hold-up time adjustability switching frequency temperature coefficient
PS-ON = NC (internal circuit will drive PS-On to 11~16 Vdc)
TTL goes high 50~250 ms after powered on TTL goes low 5~20 ms before Vo 5 Vdc A 12 Vdc 500 mA
1. When not used, short PS-ON & signal GND.

parameter conditions/description latch mode 12 Vdc output 24 Vdc output 36 Vdc output 48 Vdc output auto recovery auto recovery (temperature 110 C models 130 min typ max units Vdc %

over current protection short circuit protection over temperature protection

parameter isolation voltage isolation resistance safety approvals safety class conducted emissions radiated emissions harmonic current emissions voltage fluctuations & flicker ESD radio-frequency, Continuous radiated disturbance EFT/burst surge conducted immunity power frequency magnetic field voltage dips voltage interruptions MTBF RoHS

conditions/description input to output for 1 minute input to earth for 1 minute output to earth for 1 minute

UL60950-1 (2nd edition) class EN55032:2012+AC:2013, EN55022:2010+AC:2011, Class B , FCC CFR 47 Part 15 Subpart EN55032:2012+AC:2013, EN55022:2010+AC:2011, Class B , FCC CFR 47 Part 15 Subpart B IEC 61000-3-2:2014, Class & D IEC 61000-3-3:2013 IEC 2kV, 4kV, Class A IEC 61000-4-3:2010, Class A IEC 1kV, 2kV, Class A IEC 61000-4-5:2005, L-N: 0.5kV, 1kV, L-PE, N-PE: 1kV, 2kV, Class A IEC 61000-4-6:2013, Class A IEC 61000-4-8:2009, Class A IEC 61000-4-11:2004, Dip: 30% reduction, Dip: 70% reduction, Class A IEC 61000-4-11:2004, >95% reduction, Class B as per at 115 Vac, 2011/65/EU 160,000

1. The power supply is considered a component which will be installed into final equipment. The final equipment still must be tested to meet the necessary EMC directives.

parameter operating temperature storage temperature operating humidity operating altitude vibration2 shock2

5000 as per MIL-STD-810F Table 15~2000 Hz for 1 hour on each axis for 3 hours as per MIL-STD-810F Table 516.5, Table 516.5-1; for ms on each axis 3 times 4 75

VOF-300 Output Power vs. Input Voltage (Natural Convection)
VOF-300-CNF Output Power vs. Input Voltage (Natural Convection)


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CUI’s 300 W open-frame AC / DC power supplies are higher-power additions to CUI’s latest-generation open-frame AC / DC power portfolio. The VOF-300 series is designed to offer a combination

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