PFC175SFX 175W Power Supply from RAM Technologies


175-Watt Medical-Grade SFX Power Supply

The PFC175SFX is a 175W SFX power supply specifically designed for powering microATX medical applications. The PFC175SFX exceeds the SFX12V version 3.0 standard including PCI Express.



Factor Correction insures conformance to EN61000-3-2 harmonic standard and EN61000-4-11 Voltage Dips and Interruptions.


Cable connectors and lengths are customized to your specifications. Please consult our output cable configurator or contact us for details.
ATX12VO Option: The PFC175SFX can be built to conform to the Intel 12-Volt only (ATX12VO) configuration, using the 10-pin motherboard power connector.
Recommended Line Cord: SJT, 3X16 or 3X14 AWG





Input Voltage Range: 100 to 250 VAC +/-10%
Supply overvoltage: Cat Two <300V
Input current: 2.5 A MAX
Frequency: 50/60 HZ
Inrush Current: 45A Cold @ 264 VAC
Efficiency: 75% to 80% TYP.
PFC Correction: Active > .95
Leakage Current: < 250uA @ 264 VAC 60HZ
Input Fuses: 2X 5A 250V Line & Neutral


Max output power: 175 Watts cont.
Hold-up Time: >40ms @ full load
Overvoltage Protection: +15% of set voltage
Thermal Protection: Auto Recovery/ cycle pwr. on
Minimum Loading: None
Cross regulation: <0.5%
Line Regulation: <0.05%
Load Regulation: <1% +/- cable factor
AC turn on time: < 2 sec

Output Voltage +12V +5V    +3.3V -12     -5V +5Vsb
Output current max.        10A
15A 15A 1.0A
0.5A 2.0A
Ripple mV P-P   100 50 50   100 50    50   


Operating Temperature: 0 to 50 C
Storage Temperature: -40 to 80 C
Operational Humidity: 0 to 95%NC
Storage Humidity: 0 to 95%NC
Operational Altitude: -500 to 9840 FT
Storage Altitude: -500 to 40.000 FT
Pollution Degree Class: Two


MTBF (demonstrated): > 500,000 hours
Expected Life: >8 years when use as specified

EMC Compliance

EN61000-4-2 ESD level3
EN61000-4-3 RF susceptibility 3v/m
EN61000-4-4 EFT level3
EN61000-4-5 Surge Level3
EN61000-3-2 Harmonics
EN61000-3-3 Flicker
EN61000-4-11 Voltage Dips, Short Interruptions
EN55011 Conducted and radiated emissions

Standards Compliance

Desktop Platform Form Factors: REV 1.1 March 07 IEC60601-1 2nd & 3rd edition
RoHS compliant UL file E191947 ISO9001:2008
Lead free ROHS and REACH compliant


  1.  Max output from +5V & +3.3V= 125 Watts. When loading the +5 &+3.3V, multiply total load by 1.2 and subtract from 175 Watts.
  2. Output derates from 100 VAC to 85VAC 3.5W/Volts.
  3. Total output from all outputs shall not exceed 175 Watt.
  4. Initial voltage tolerance +/-3%