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Single hot-swappable PSU module, compact ATX PS2 form, matte metal finish

FSP

FSP Twins Pro 500W ATX PS2 Hot-Swappable Redundant Module power supply

SKU CH-EMPK-BND2X

A hot-swappable 500 W ATX PS2 redundant module with 80 Plus Gold efficiency for continuous server operation

  • TypeATX12V / EPS12V
  • Maximum Power500 W
  • +12V RailsSingle
  • Max PSU Length190 mm
  • ModularNon-Modular
  • Energy-Efficient80 PLUS GOLD Certified

Options ATX PS2 Individual (500W)

Struck-through versions exist but are not stocked here.

  • Hot-swappable module keeps servers running during replacement
  • 80 PLUS Gold efficiency cuts energy waste at 500 W
  • Single 12 V rail delivers stable power to all components
  • Compact 190 mm ATX PS2 form factor fits redundant chassis
  • Meets UL 62368 safety standard for reliable operation

Replacement Module for Twins Pro 500W

This is a single replacement module designed for the FSP Twins Pro 500W ATX PS2 1+1 redundant power supply. It delivers up to 500 W through a single +12 V rail and meets 80 Plus Gold efficiency with greater than 90 % performance. The unit complies with ATX12V and EPS12V standards and the UL 62368 safety standard.

Who This Suits and Who Should Look Elsewhere

System administrators running servers or workstations that require continuous uptime can hot-swap a failed module without shutting down. Builders assembling a new system or upgrading a non-redundant chassis should look at a standard single-unit power supply instead.

ATX PS2 Redundant Form Factor

The module measures 190 mm in length and follows the ATX PS2 redundant size specification. It is non-modular and built to slot directly into the Twins Pro chassis for tool-free replacement.

Highlights

  • Hot-swappable module keeps servers running during replacement
  • 80 PLUS Gold efficiency cuts energy waste at 500 W
  • Single 12 V rail delivers stable power to all components
  • Compact 190 mm ATX PS2 form factor fits redundant chassis
  • Meets UL 62368 safety standard for reliable operation

Specifications

BrandFSP Group
TypeATX12V / EPS12V
Maximum Power500 W
+12V RailsSingle
Max PSU Length190 mm
ModularNon-Modular
Energy-Efficient80 PLUS GOLD Certified

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Questions about this item

What comes with the FSP520-20RAB module and what else is needed for a redundant setup?

The package contains one hot-swappable module rated at 500 W with 80 PLUS Gold efficiency. A second identical module and the Twins PRO 500W chassis are required to form the 1+1 redundant power supply.

Which module variant matches the Twins PRO 500W chassis?

Choose the FSP520-20RAB module; it is the designated replacement for the Twins PRO 500W and delivers the full 500 W capacity with 80 PLUS Gold certification.

What does the 500 W rating mean once the module is installed in a server?

Each module can supply the full 500 W load on its own; during normal operation two modules share the load, and if one fails the other continues delivering up to 500 W without interruption.

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