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SS-300SFD Seasonic Micro ATX for ReadyNAS Pro
Manufacturer: Seasonic
SKU: H-002546

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POWER SUPPLY IS NOW DISCONTINUED. See SSP-300SFG as the only same size alternative now available.



SS-300SFD Micro ATX for ReadyNAS Pro Seasonic.


Seasonic's SFX power supplies with Active Power Factor Correction, super high efficiency and reliability meet both industrial and home use requirements. They offer power rating of 250 watts, operation with temperatures as high as 50°C.

Ideally suited for use in extreme environments as well as for applications such as factory automation and other industrial applications. The devices are also well suited for use in a wide variety of applications including telecommunications, networking, instrumentation, test equipment, and measurement.

As for home of office use in HTPCs or thin clients, Seasonic's Flex-ATX power supplies offer unmatched S2FC fan control system, which keep those PSU cool and quiet. Under max load it stays under 25 dBA noise, which is lower than vast majority of active CPU cooling systems can offer.

As used in ReadyNAS Pro. To use in ReadyNAS Pro you will require additional 24cm extension lead H-002109.

Replacement for ST-250MAD, ST-232MQ, ATX-1523F, ST-350M-AE, ST-350MAE



  • Active Power Factor Correction
  • Full range AC input
  • Forward Converter design
  • High reliability ball bearing fan
  • Smart and silent fan control  (S2FC)
  • Dual sided PCB
  • Over voltage protection
  • Over power protection
  • Short circuit protection on all outputs
  • Cables: 1 x 20 + 4 way, 2 x SATA, 4 x HD 4 way molex, 2 x Floppy, 1 x 12vP4



5vDC @20A, 3.3vDC@20A, +12vDCV1@8A, +12vDCV2@14.5A, -12vDC@0.8A, +5VSB@2A. Max 300Watt


NB: Images are indicative only
Additional Information

SS-300SFD Micro ATX for ReadyNAS Pro Seasonic

Replacement for ST-250MAD, ST-232MQ, ATX-1523F, ST-350M-AE, ST-350MAE


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Weight (kg):
Standard Warranty

20 Way plug to 20 Way Socket Extension ATX
£ 4.64 inc VAT
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