Seasonic SS-400H2U ATX12V and EPS12V Power Supply
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Product Information for Seasonic SS-400H2U ATX12V and EPS12V Power Supply

Highlights for Seasonic SS-400H2U ATX12V and EPS12V Power Supply

  • Output Power:400 W
  • Efficiency:83%
  • Form Factor:Rack-mountable

Marketing Information

Seasonic's 1U, 2U rackmount power supplies with Active Power Factor Correction, super high efficiency and reliability to meet industrial requirements that offer power ratings of 250 watts to 600 watts, operation with temperatures as high as 50C. Ideally suited for use in extreme environments as well as for applications such as factory automation and other industrial applications. The devices are also well suited for use in a wide variety of applications including telecommunications, networking, instrumentation, test equipment, and measurement.

Technical Information

  • Power Factor Correction (PFC): Active
  • Modular: Yes
  • Warranty

  • Standard Warranty: 5 Year Limited
  • Controls/Indicators


  • Receptacles: ATX Motherboard
  • Environmental Conditions

    General Information

  • Product Type: ATX12V & EPS12V Power Supply
  • Manufacturer Part Number: SS-400H2U
  • Manufacturer Website Address:
  • Manufacturer: Sea Sonic Electronics Co., Ltd
  • Product Model: SS-400H2U
  • Product Name: SS-400H2U ATX12V & EPS12V Power Supply
  • Product Series: H2U
  • Brand Name: Seasonic
  • Miscellaneous


    • Industrial PC
    • Server

    Green Compliant


    Green Compliance Certificate/Authority


    Physical Characteristics

  • Dimensions: 2.7" Height x 3.9" Width x 8.9" Depth
  • Form Factor: Rack-mountable
  • Power Description

  • Input Voltage: 110 V AC
  • Output Power: 400 W
  • Output Voltage: 3.3 V DC @ 20 A
  • Input Voltage Range: 100 V AC to 240 V AC
  • Number of +12V Rails: 2
  • Input Voltage Type: AC
  • Reliability

  • MTBF: 100000 Hour
  • Technical Information

  • Efficiency: 83%
  • Protection Type: Short Circuit
  • Number of Fans: 1