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Seasonic Power Supply SSR-550FX 550W 140mm ATX 12V FULL MODULAR 80+ GOLD


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Seasonic engineers have created a brand new product line based on advanced technology emanating from many years of intensive active research. The result of this development is the solid FOCUS+ Series, which implements modern design and shows outstanding electrical performance. This power supply is small and entirely modular, which will be hard to resist. It is available in 80 PLUS® Platinum and Gold efficiency ratings.

80 PLUS® Gold
The FOCUS PLUS Gold Series achieves 80 PLUS® Gold certification with its 90 % efficiency at 50 % system load.

Cable-free Connection Design
Seasonic’s engineers have implemented a new design feature, where instead of cables; the back panel and the PCB (Printed Circuit Board) are connected by a copper plate. This breakthrough solution not only lowers the chance of production errors during manual insertion but it also improves output power quality.

Hybrid Silent fan Control
The industry’s first, Seasonic patented, advanced three-phased thermal control achieves optimal between silence and cooling. This Hybrid Silent Fan Control functions in three operational stages: Fanless Mode, Silent Mode, and Cooling Mode.

• Reduced noise without increase in temperature;

• Extended fan life due to the reduced number of fan rotations;

• Optimized heat dissipation at all times;

• Unsurpassed silent performance in Fanless Mode.

Additionally, there is a switch at the back of the power supply which allows users to customize their cooling needs by selecting between the Seasonic S2FC (fan control without Fanless Mode) and the S3FC (fan control including Fanless Mode).
Cybenetics Efficiency Level
ETA-A (View report)
Cybenetics Noise Level
LAMBDA-A+ (View report)
Form Factor Intel
ATX 12 V
Fan Information
Fan Size: 120 mm
Fan Control: Premium Hybrid Fan Control
Fan Bearing: Fluid Dynamic Bearing
Life Expectancy: 50,000 hours at 40oC, 15 % – 65 % RH
Cable Information
Modularity: Fully Modular
Cable type: Flat black cables
Electrical Features
Operating Temperature: 0 to 50oC (derating from 100 % to 80 % from 40oC to 50oC)
MTBF at 25oC, excl. fan: 100,000 hours
AC Input: Full Range
Protection: OPP, OVP, UVP, OCP, OTP, SCP
Safety and Environmental
Safety and EMC: cTUVus, TUV, CB, CCC, BSMI, EAC, CE
Environmental Compliance: Energy Star, RoHS, WEEE, ErP Lot 6, REACH
AC Input
Voltage: 100 V – 240 V
Current: 8 – 4 A
Frequency: 50 Hz – 60 Hz
DC Output
Rail: Maximum Power:
+3.3 V: 20A/100W
+5 V: 20A/100W
+12 V: 45A/540W
-12 V: 0.3A/3.6W
+5 VSB: 3A/15W
Total continuous power
550 W
Item Dimension ( L inchxW inchxH inch)
6 x 6 x 4
6.10 lb
Warranty Information
10 years

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