Dimensions : 140 x 150 x 86mm
Application : Desktop
Watt : 300W


This specification describes a 300 watts power supply. With 5 output, and remote ON/OFF control for ATX-12V system and a “Power factor correction (active PFC)” circuit at 200V-240Vac.



Model Name FSP300-50ARN
Wattage 300W
Dimension 140mm (L) × 150 mm (W) × 86mm (H)
Product Highlight Efficiency Level 230V EU 80Plus Bronze
Erp Lot <0.5W
Input Voltage 230Vac
General Specification Effciency 85%@ 20% load; 88%@ 50% load; 85%@ 100% load
PWOK Delay Time 500ms > PWOK > 100ms
EMC performance EN55022 class B
EN 61000-3-2
EN 61000-3-3
Input Electrical Specification Input Frequency 47 ~ 63 Hz
Input Current 2.5Amp (maximum) at 200-240 Vrms/ 50 Hz.
Output Specification Output Rise Time +3.3V 20Ms (maximum)
+5V 20Ms (maximum
+12 V 20Ms (maximum)
-12 V 20Ms (maximum)
Environmental Requirement Temperature Range Operating : 0 to +40℃
Storage :-40 to +70℃
Humidity Operating : 85% to % RH, Non-condensing
Storage : 95% to % RH, Non-condensing
MTBF The power supply reliability, when calculated by “Bellcore” latest revision are exceed 100,000 hours with all output at maximum load and an ambient temperature of 25℃.
Safety CE,TUV

Output Voltage and Current Rating

+3.3V +5V +12V1 -12V +5Vsb
Ripple-Noise(R-P) mV 50mV 50mV 120mV 200mV 50mV
Regulation Load % ±5% ±5% ±5% ±10% ±5%
Output Max.(A) 21A 15A 24A 0.3A 2.5A
Output Min.(A) 0.2A 1A 0.05A 0A 0A


  • +3.3V & +5V total output not exceed 103W.
  • When +5V is load to 15A, the +3.3V maximum load is 8.46A.
  • When +3.3V is load to 21A, the +5V maximum load is 6.74A.

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