PS Open Frame Power Supply

Seasonic built this AC to DC open frame power supply series with active power factor correction and no load power consumption of less than 0.5 Watts. The unit’s working temperature is rated between 0 °C and 50 °C and highly reliable Japanese capacitors ensure long-term reliability. These power supplies have built-in Class B EMI filter and they are protected against over voltage, over power and short circuit incidents. Average efficiency is between 85 % and 87 % (depending on the model). Universal AC input and fully regulated output complete the package to make this unit an optimal solution for automated teller machines, POS systems and various network and computer data storage applications.

  • Safety: CB, cUL, TUV
  • EMC / EMI: CE, FCC
  • Dimensions: 127 mm (L) x 76.2 mm (W) x 34.6 mm (H)



Efficiency ≥ 87 % 88% 85 % - 87 % (typical)
Dimensions 127 mm (L) x 50.8 mm (W) x 24.1 mm (H) 99 mm (L) x 31.2 mm (W) x 20 mm (H) 127 mm (L) x 76.2 mm (W) x 34.6 mm (H)
Universal AC input / Full range Yes NO Yes
Built in Class B EMI filter Yes NO Yes
Highly reliable Japanese 105 °C aluminum electrolytic capacitors Yes Yes Yes
No load power consumption ≤ 0.5 W Yes NO Yes
Active power factor correction NO NO Yes
Fully regulated output Yes Yes Yes
0–50 °C working temperature Yes Yes with 10 CFM cooling fan Yes
With active cooling at 10.5CFM, the max output is 150 watts.
With Passive cooling, the max output is 90 watts.
Short circuit protection Yes Yes Yes
Over voltage protection Yes NO Yes
Over power protection Yes NO Yes
Safety compliance CB, cUL, TUV, CCC NO CB, cUL, TUV
EMC/EMI compliance CE, FCC NO CE, FCC
BTO (Build to Order) No*
* Except 24 V and 48 V and 55 V
Yes No*
* Except 24 V and 48 V



Model Total continuous power O/P Voltage O/P Current Efficiency
SSF-1501PS-12 150 W 12 V 12.5 A 85 %
SSF-1501PS-48 150 W 48 V 3.125 A 87 %
SSF-1501PS-55 150 W 55 V 2.728 A 87 %