Seasonic S12II-520 Bronze Series Power Supply 520W


Today, Sea Sonic Electronics launches the S12II ?Bronze? Series; the updated version of the award winning S12II Series to meet the growing demand for high efficiency and yet price competitive power supplies.

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 and 620W models come 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.

The S12II Bronze Series meets most major safety and EMC directives and as well, environmental regulations such as RoHS & WEEE. Special built-in protection features such as Over Voltage Protection (OVP), Over Power Protection (OPP), Short Circuit Protection (SCP), and Over Current Protection (OCP) are also included for added safety and usage reliability.


  • Complies with the newest Intel ATX 12V / EPS12V
  • Dimensions: 140 x 86 150mm (wxhxd)
  • Cooling: 120mm dual ball bearing Cyclone Cooling Fan
  • MTBF: > 100,000 hours @ 25 C
  • PFC harmonics compliance: EN61000-3-2
  • 3.3V - 24 A
  • 5V - 24 A / together with 3.3V 130 W
  • 12V - 40 A / 480 W
  • -12V - 0.8A / 9.6 W
  • - 5V - 2.5A / 12.5 W
  • Total 520 W
  • Warranty: 5 years

  • Manufacture Site: http://www.seasonicusa.com


    • Highly reliable 105 C Japanese Brand Capacitors
    • Super high efficiency (up to 80%)
    • Active Power Factor Correction (99% PF)
    • 150W PCI-E ready with 6-pin VGA connector (520w and 620w models only)
    • 2 PCI-E Connector: nVIDIA SLI and Crosfire approved (500w and 600w models only)
    • High Reliable Aluminum Electrolytic Capacitors
    • Soft-mounting rubber cushions reduce fan rotation and vibration noise
    • Black sleeved cables for improved air flow and cable management
    • Forward Converter Circuit Design
    • Total protection: CVP, OPP & SCP
    • Supports PCI Express and SATA
    • Dual +12V Outputs
    • Smart & Silent Fan Control
    • Universal Free AC Input ( Full Range )
    • All-In-One DC cabling design
    • Patented Easy Swap Connector
    • Dual 6P VGA Power Connectors
    • Smart and Silent Fan Control (S2FC)
    • Ultra Ventilation (Honey Comb Structure)
  • Reviews

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