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Seasonic S12II-520 Bronze Silent 520W PSU

CCL Code: PSU0260
Manufacturer Code: SS-520GB
Manufacturer: Seasonic
Seasonic S12II-520 Bronze Silent 520W PSU

Key Features:

  • 6x Molex Connectors
  • 6x SATA Connectors
  • 4 + 4-Pin CPU Power Connector
  • ATX Form Factor


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The S12II Bronze Series achieves the 80 PLUS® Bronze standard of at least 82%, 85% & 82% power usage efficiency at 20%, 50% & 100% operating loads respectively.  This, combined with Active Power Factor Correction, enables the S12II Bronze to reduce energy waste, boost power efficiency and more importantly, reduce the energy costs for the users.

In addition to the efficiency upgrade, the S12II Bronze Series maintains the strong foundations of the S12II series.  Important features such as the stable and proven Double Forward Converter circuit design, the industry leading Smart and Silent Fan Control (S2FC) and the use of high reliability Japanese brand capacitors are all carried forward to the “Bronze”.

The S12II Bronze Series, similar to its predecessors, is available in the standard ATX Form Factor and in wattages that are most common for a PC system.  In addition to the all-in-one cabling design, the 520W model comes with additional EPS connectors for IPC and server systems and supports both 6P & 8P PCI-E connectors for the most current and high end dual graphic cards.

Main Features

  • Super High Efficiency up to 87% - Green Solution for reducing energy consumption noise and heat
  • Highly Reliable 105C Japanese Brand Capacitors - Excepectionally Reliable components extend product life
  • Ample +12V Outputs - Enhanced +12V current capability broadens utilisation possibilities
  • Active Power Factor Correction [99% PF Typical] - Reduces line loss and power distortion
  • Double Forward Converter Design - Advanced topology for high efficiency
  • Smart and Silent Fan Control [S2FC] - Intelligent thermal control balances between noise and cooling
  • 12cm Ball Bearing Cooling Fan - Increases airflow and lifetime aand reduces rotation speed and noise
  • Soft-Mount Rubber Cushions - Reduce fan rotation and vibration noises
  • Ultra Ventilation [Honeycomb Structure] - Minimizes airflow resistance for maximum cooling
  • Universal Video Card Support - Supports new PCI-E video card technologies
  • All-in-One DC Cabling Design - Supports PC, IPC, workstation and server systems
  • Patented Easy Swap Connectors - Unplug the connectors easily quickly and safely
  • Universal AC Input [Full Range] - Plug and run safely anywhere in the world
  • 5 Year Warranty - Our commitment to superior quality


SATA Connectors 6
CPU Connectors 1 x 4+4-pin EPS
PCI Connectors 2 x 6+2-pin PCIe
Motherboard Connectors 1 x 20+4-pin ATX
Molex Connectors 6
Floppy Connectors 1 (via Y-adapter)


Standards OPP, OVP, UVP, SCP
Safety cTUVus, TUV, Gost-R, UkrTEST, CB , BSMI, Semko, CCC, CE, FCC, C-tick


Voltage 100 ~ 240 VAC
Power 520 W
Frequency Range 50 ~ 60 Hz
Power Cord No


Operating Temperature 0 to 40 °C
Operating Humidity 20 to 80 %


Form Factor ATX Power Supply Unit
Case Colour Black
In The Box Power Supply
Width 150 mm
Depth 140 mm
Height 86 mm
Weight 2.0 kg


Warranty 5 Years

Key Features

Modular Cables No
80Plus Rated 80 Plus Bronze
PSU Form Factor ATX
PCI-E Connectors 2
Floppy Connector 2
Motherboard Power Connectors 4 + 4-Pin
PCI-E Pin Type 6-Pin + 6+2-Pin
PSU Depth 140 mm
ETA Efficiency Cert. Not Rated
Lambda Noise Cert. Not Rated

Item Details

Manufacturer Seasonic
Manufacturer Code SS-520GB
Alternative Part Number S12II-520
EAN 4711173870784
UPC 882016000829
Condition New

Warranty Information

Warranty 5 Years

Manufacturer Information

Manufacturer Seasonic
Manufacturer Code SS-520GB

Do you have you a question about the Seasonic S12 II Bronze 520W Silent Power Supply?

4 / 5 3 reviews

Mac Howarth

10 months ago

Bit more pricey than others, but quality is excellent. Well worth it and great service from CCL


11 months ago

Great quality products at a bargain price and prompt delivery. I am very happy with the service provided. This is my favorite online shop- please keep on doing fantastic job.

David Taylor

January 2019

As good as I would expect for the money. Therefore recommended.