Twins (500/700W)

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Twins series, a redundant power supply, is designed for standard ATX or PS2 chassis, no front end bracket needed, ideal for mail, web or home server. Hot swappable modules design provides stable power supply: when one fails, the other can take over the load immediately.Thus users do not need to worry about any server/PC power off situation.


  • ATX PS2 redundant size, no front end bracket needed, ideal for mail, web and home server
  • Digital-controlled power supply design can be monitored by “FSP Guardian” software
  • Hot swappable modules design and no worry about server/PC power off when one of modules failure
  • Complete protection: over current protection, short circuit protection, over voltage protection, fan failure protection
  • Alarm guard design by smart power supply status LED indicator
  • 80 PLUS® 230V Internal Gold Certification
  • Complies with ATX 12V and EPS 12V standards
  • Flat ribbon cables, ideal solution for applications with space constraint issue

FSP Guardian Intelligent Monitor Software Video_English:

Server-grade & Stable Power Supply Provider

Twins ensembled in tower

Twins ensembled in tower

Different from the general power supply units, Twins series is a redundant power supply unit with two power modules. In normal situation, these two power modules will automatically share the load for optimum efficiency; while one fails, the other module will immediately take over the whole load.

That is redundant power supply is usually used in industrial data centers’s sever or banking computer systems. Twins can guarantee your PC system under a stable power supply situation.

Hot Swappable Modules Design

twins_hot_swappable_detailWhen a power module fails and the redundant unit takes over immediately, the damaged one can be replaced without stopping the operation. No need to worry about the risk of data disappearance or the disruption of system.

80 Plus® Gold Certification


Twins Series is a power supply with 80 PLUS® 230V Internal Gold Certification that guarantees to operate at a minimum of 90% efficiency at 50% load of PSU rated power and as a result to reduce lots of electricity cost.

FSP Intelligent Monitor Software

fsp_intelligent_monitor_softwareUsers can use FSP Guardian software to monitor power input, power output, efficiency, and other internal records in real time and get the historical data within 30 days. When power input or output reaches the warning points during the process , FSP Guardian will immediately shows warning message to remind the latest situation of Twins.

DOWNLOAD FSP Guardian Software here

Ideal for Home or Business Server


Twins series is an ATX size redundant power supply, without front end bracket, it is compatible for most PS2 chassis. It is an ideal power supply unit solution for startups, small and medium-sized businesses web or mail server systems, semi-industrial application. It is also the best power supply unit for intelligent home computer station.

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Black Ribbon Cable Design

Easy install avoids cables becoming messy, saves the chassis’ inner space, lets the airflow smooth, enhances the heat emission effect and finally extends the life span of each component.

DC to DC Module Design

+12V SR circuit, combining both +3.3V and +5V DC-DC modules, offers supreme efficiency, voltage stability and high system compatibility especially in cross regulation (unbalanced load) mode


Connector Table:



Model Frame: FSP500-70RGHBB1
Single Module: FSP520-20RGGBB1
Frame: FSP700-50RGHBE1
Single Module: FSP720-20RGGBE1
Type PS2 ATX Redundant
Effeciency >90%
Input Voltage 100 ~ 240Vac
Input Current 8-4A
Frequency 50 ~ 60Hz
PFC Active PFC
Power Provided 500W 700W
Over-Current Protection
Over-Voltage Protection
Short-Circuit Protection
Fan Failure Protection
Case Color Black
Chassis Fan Dual ball bearing fan, 40 mm
Form Factor
Safety Approval  CB / TUV/ FCC / UL / CCC
Dimensions (LxWxH) mm 190 x 150 x 86

Power Output Table:

500W FSP500-70RGHBB1
AC Input 100-240V~, 8-4A, 60-50Hz
DC Output +3.3V +5V +12V1 +12V2 +12V3 -12V +5Vsb
Max Output Current 20A 20A 16A 16A 16A 0.5A 3A
Max Combined Power 130W
Total Power 500W
Single Module Model No.: FSP520-20RGGBB1
DC Output +12V⎓43.3A +5Vsb⎓3.0A
Total Power 520W
700W FSP700-50RGHBE1
AC Input 100-240V~, 10-5A, 60-50Hz
DC Output +3.3V +5V +12V1 +12V2 +12V3 -12V +5Vsb
Max Output Current 20A 20A 17A 17A 17A 0.5A 3A
Max Combined Power 130W
Total Power 700W
Single Module Model No.: FSP720-20RGGBE1
DC Output +12V⎓60.0A +5Vsb⎓3.0A
Total Power 720W

Product Video:


Twins 500W Twins 700W

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