80PLUS Bronze
Intel ATX 12 V v2.31 compliant YES
EPS 12 V compliant YES
Flex ATX v1.0 compliant YES
Dimensions 150 mm (L) x 81.5 mm (W) x 40.5 mm (H)
DC to DC converter design No
Forward converter circuit YES
Fully modular cables Yes
Semi modular cables No
Fixed cables No
40 mm double ball bearing fan Yes
S3FC - including Fanless mode Yes
S2FC - Smart and Silent Fan Control No
Easy-swap connector design Yes
Zero minimum load on 3.3 V rail No
Short circuit protection on all outputs Yes
Over voltage protection Yes
Over power protection Yes
100 % HiPot test Yes
100 % Burn-in, high temperature cycled on/off Yes
Safety compliance CB, cUL, TUV, CCC, BSMI
EMI/EMC compliance CE, FCC, RCM
Input frequency 47 / 63 Hz
Inrush current at cold start 100 A max.
Efficiency 80 PLUS Bronze
Line regulation ± 1 % (typical)
Load regulation ± 5 % (typical)
Cross regulation ± 5 % (typical)
Ripple / noise 1 %
MTBF, full load @ 25 °C ambient (excl. DC fan) > 100,000 hours
Active Power Factor Correction 95 % (typical)


DC Outputs
+3.3 V +5 V +12 V1 +12 V2 -12 V +5 Vsb Total continuous power Input Type
14 A 17 A 12 A 12 A 0.8 A 2 A 250 W 100–240 VAC
110 W 216 W 9.6 W 10 W

The Seasonic industrial level switch mode power supplies offer a reliable source for a wide range of setups.

Our fully modular Flex ATX range with its full range AC input comes in, 250 W and 300 W versions and is the ideal choice for workstations,

standard or advanced servers and various automation or communication applications.

Their super low noise fan control makes them a pleasant companion in any industrial system.


*This is the successor to SS-250SU.

Data Sheet

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  • Brand: Seasonic
  • Product Code: SSP-250SUB
  • Availability: In Stock
  • ¥9,721

  • Ex Tax: ¥8,837

Tags: Seasonic, Power_supply