1U 300 Watts SINGLE FLEX ATX Power Supply


SKU: SPI300F4BB Category:



  • Temperature Range:Operating: Operating: 0 C ~ +50 C; storage & shipping: -20 C ~ +80 C
  • Humidity: 90% on operating, 95% on storage
  • Dielectric Withstand: Primary frame ground 1800V AC for 1 second
  • Efficiency: 82% minimum
  • Rise Time: Less than 20ms
  • Hold-Up Time : 17ms minimum at nominal input voltage
  • Power Good Signal :Power on delay time 100 ~ 500ms, off delay 1ms minimum (TTL and CMOS compatible)
  • Leakage Current: Less than 3.5mA at 264Vac, 50Hz
  • MTBF: 100,000 hours on maximum load at +25 C
  • Dimensions (LxWxH):150×81.5×40.5mm /5.9×3.2×1.6inch


  • Complied with FLEX ATX and ATX12V standard
  • Active Power Factor Correction Meeting with EN61000-3-2
  • High efficiency and reliability
  • Compatible with European Union Directive 2002/95/EC(Restriction on Hazardous Substances).
  • Remote ON/OFF function
  • Noise Killer (thermal fan speed control function)
  • Low noise and ripple
  • Internal 12V DC fan included
  • Output over voltage, short circuit, and over current protection
  • 100% Hi-pot, ATE, and burn-in tested
  • Re-settable power shut down
  • Complies with FCC part 15 subpart J class B 115Vac operation, and CISPR 22 class B at 230Vac operation
  • Approved by UL/CUL 60950-1,EN60950-1 2nd (CB Report) CE ,FCC,EMC report

Input Characteristics

  • Input Range: 90 ~ 264Vac (RMS), Full Range Input
  • Frequency: 47 ~ 63Hz
  • Input Current: Max 6A (RMS) @ 115Vac, 3A (RMS) @ 230Vac
  • Inrush Current: No damage

Output Characteristics


Output Voltage Min Load Normal Load Max Load Load Reg. Ripple & Noise
+3.3V 0.5A 8A 16A


50mV P-P

+5V 0.5A 9A 18A


50mV P-P

+12V1 0.5A 7.5A 15A


120mV P-P

+12V2 0.5A 7.5A 15A


120mV P-P

-12V 0.0A 0.25A 0.5A


120mV P-P

+5Vsb 0.0A 1.5A 3.0A


50mV P-P

* +3.3V and +5V total output not exceed 123W
* Maximum combined current for the +12V outputs shall be 36A
* +12V2 Peak current is 19A (less than 10m Sec.), minimum voltage during peak is >11.0Vdc.
*+5VsbPeakcurrentis 3.5A(lessthan500mSec.) , minimumvoltageduringpeakis>4.5Vdc.



Additional information

Weight 5.00 lbs

150×81.5×40.5mm /6×3.2×1.6inch

Storage temp.

-20 C ~ +80 C

Operating temp.

0 C ~ +50 C on full load


100,000 hours on maximum load at +25 C