When there is a need for a basic, efficient and reliable power supply for a stable office computer at a very affordable price, this unit is the first on the list. There is no doubt that the S12II-430 is all you need for a peace of mind. It has reliability built in by using high quality components assembled by Sea Sonic’s well-organized manufacturing process. Its advanced fan control system and 80 PLUS® Bronze certification are the tokens of energy savings. The power supply circuits and the system components are totally protected by Over Voltage-, Over Power- and Short Circuit Protection.

SKU: SS-430GB Active PFC Categories: ,

80 PLUS®Bronze

The 80 PLUS® Bronze certification indicates that a high percentage of the electricity is converted into useful power, therefore there is less heat lost and more money saved on the electricity bill. The 80 PLUS® Bronze certification guarantees greater than 82 %, 85 % and 82 % efficiency at 20 %, 50 % and 100 % operating loads, respectively. Sea Sonic’s Bronze Series is an economical choice with great performance and high built-in value.

Fluid Dyanamic Fan Bearing

High performance Fluid Dynamic Bearing (FDB) fans are designed to take advantage of the impact absorbance effects of oil. They are extremely reliable and generate considerably less operating noise and heat than ball bearing fans. The lubrication of the bearing surface reduces friction and vibration and therefore lowers overall power consumption. Due to the effortless, quieter rotations and its robust construction, this reliable fan technology also greatly increases the lifespan of the fan.

How it works

When the fan shaft rotates, high pressure oil drifts along the grooves of the bearing sleeve to generate a thin layer of lubrication between the bearing faces. As the speed increases, so does dynamic oil pressure and the shaft is lifted from the bearing to create smooth, effortless rotations. The herringbone shape of the groves helps to efficiently channel the lubricant and avert leakage.
The following illustration depicts the main characteristics of the FDB fans:


Fan Control S2FC-01 


The intelligent thermal circuit feature is designed to find the optimal balance between the necessity to cool the components and the need to run the power supply in the most silent manner possible.


Ample +12V Output-01 

Ample +12 V Output

Enhanced +12 V current capability broadens utilization possibilities.

Solid Capacitor-01

Solid Capacitor

Highly rated capacitors ensure long-term stability and reliability even under extreme conditions.

Universal AC Input-01 

Universal AC Input

Switch-mode power supplies can tolerate a wide range of power frequencies and voltages. The power supply is designed to automatically adjust to the inpout AC voltage, therefore it can safely be used anywhere in the world.

Specifications are subject to change without prior notice.

AC InputVoltage: 100 V - 240 V
Current: 7 A
Frequency: 50 Hz - 60 Hz
DC OutputRail+3.3 V+5 V+12 V1+12 V2-12 V+5 VSB
Maximum Power20 A20 A17 A17 A0.8 A2.5 A
130 W360 W9.6 W12.5 W
Total continuous power430 W
S12II-430 Technical Specifications
Form FactorIntel ATX 12 V
Dimensions150 mm (W) x 140 mm (L) x 86 mm (H)
Fan InformationFan Size120 mm
Fan ControlSeasonic S2FC
Fan BearingFluid Dynamic Bearing
Life Expectancy50,000 at 40 °C, 15 % - 65 % R.H.
Cable InformationModularityFully Wired
Cable typeFlat black cables
Electrical FeaturesOperating Temperature40 °C
MTBF @ 25 °C, excl. fan150,000 hours
AC InputFull Range
ProtectionOPP, OVP, UVP, SCP
Safety and EnvironmentalSafety and EMCcTUVus, TUV, Gost-R, UkrTEST, CB , BSMI, Semko, CCC, CE, FCC, C-tick
Environmental ComplianceEnergy Star, RoHS, WEEE, REACH
Warranty5 Years
Packaging information
Units per carton5
Individual carton size310 (L) x 115 (W) x 180 (H) mm
Shipping carton size596 (L) x 198 (W) x 335 (H) mm
Specifications are subject to change without prior notice.

ConnectorConnector CountLengths
MAIN-POWER-24-20-PIN-A1550 mm - attached
PCIE-8-PIN-A1550 mm - 8/4 pins attached
PCIE-6-8-PIN-1-A2550 + 100 mm - 8/6 pins attached
SATA-5-PIN-A6400 + 100 + 100 mm - attached
500 + 100 + 100 mm - attached
PERIPHERAL-4-PIN-A3400 + 100 + 100 mm - attached
FDD-4-PIN-1-A1100 mm - end connector of the Peripheral cable
Specifications are subject to change without prior notice.

Hardware Secrets | Golden Award

July 5, 2012

“The Seasonic S12II ronze 430 W is aflawless power supply.” “…you can by this power supply with your eyes closed. You won’t regret it.”

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