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Seasonic Focus PX 850W - Power supply, 80 Plus Platinum

Manufacturer: SEA SONIC ELECTRONICS
ID: FOCUS-PX-850
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Key Specifications

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Specifications
Description
Store availability
Delivery
Price development
Technical details
Sustainability certificatesENERGY STAR
Ports & interfaces
Motherboard power connector20+4 pin ATX
Peripheral (Molex) power connectors (4-pin)5
CPU power connector (4+4 pin)checkmark
PCI Express power connectors (6+2 pin)2
Cabling typeModular
Motherboard power cable length61 cm
SATA power cable length450,810,860 mm
CPU power cable length65 cm
Peripheral (Molex) power cable length470,690 mm
PCI Express power cable length75 cm
Weight & dimensions
Height86 mm
Width150 mm
Depth140 mm
Energy management
Input current5.5 - 11 A
Nominal power850 W
Power protection featuresOver current, Over power, Over voltage, Overheating, Short circuit, Under voltage
Combined power (+3.3V)100 W
Combined power (+12V)840 W
Combined power (+5V)100 W
Combined power (-12V)3.6 W
Combined power (+5Vsb)15 W
Max output current (+3.3V)20 A
Max output current (+12V)70 A
Max output current (+5V)20 A
Max output current (-12V)0.3 A
Max output current (+5Vsb)3 A
AC input frequency50 - 60 Hz
AC input voltage100 - 240 V
Total power850 W
Operational conditions
Operating temperature (T-T)0 - 50 °C
Packaging data
Package typeBox
Certificates
80 PLUS certification80 PLUS Platinum
Design
Product colourBlack
On/off switchcheckmark
Fan diameter12 cm
Performance
CertificationWEEE, ErP Lot 6, REACH
Mean time between failures (MTBF)100000 h
SafetycTUVus, TUV, CB, CCC, BSMI, EAC, CE
PurposePC
Bearing technologyFDB
Power supply unit (PSU) form factorATX
Logistics data
Harmonized System (HS) code84733020
EAN4711173874638
Warranty1 year

FOCUS PX (ONESEASONIC)
The newly upgraded FOCUS PX and GX series are the successor to the FOCUS PLUS Series, which became an instant the top seller in the power supply market after its launch in 2017. In 2019, Seasonic engineers have made improvements on the popular series, removing the inline capacitors on the supplied cables. Besides the small change in the series naming, the PSU housing and its packaging are also updated to be in line with the concept of the OneSeasonic Initiative.

80 PLUS® PLATINUM
The FOCUS PX achieves 80 PLUS® Platinum certification with its 92 % 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.

THE FAN CONTROL BUTTON
The fan control button can be found on the back of the FOCUS PLUS power supply, next to the power switch. The image here illustrates how to select different fan control modes to suit your need.

DO NOT press the button if you wish to include the Fanless Mode, which means the fan in the power supply will not spin when the power supply is under light loads. Press the button if you wish to have the fan spin at all times, even at lower loads.

FLUID DYNAMIC 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.

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