Twins PRO 500W

The Twins PRO series is a redundant power supply designed for standard ATX or PS2 chassis. There is no front end bracket so it's ideal for mail, web, or home servers. The hot-swappable module design provides a consistent power supply and when one fails, the second modular power supply can take over the load immediately. The redundant power supply will give you the freedom and security of never having to think about downtime when it comes to power management.
  • ATX PS2 redundant size
  • Efficiency ≧ 90% at typical load
  • Quiet and long-lasting 40mm ball bearing fan
  • Ribbon cables for th need of enthusiasts
  • Powerful single +12V rail design
  • All Japanese electrolytic capacitors
  • Intel Latest CPU ready
  • Full protections OCP, OVP, SCP, OPP, OTP, FFP, UVP
Twins_Pro Built-in hot swappable modules

Redundant system design and built-in hot swappable modules

With redundancy in mind, the Twins Pro modular system design is more efficient and operates quieter by distributing the power load between two hot-swappable PSU modules. If one unit fails, the second unit takes control of the power load until a replacement is swapped in. Each unit can be hot-swapped and replaced without any system down-time offering a seamless and uninterrupted operation.

Twins_Pro Black ribbon cable design

Black ribbon cable design

The round black ribbon cable design helps with heat emission effect and extends the life span of the components. The ribbon cable design also offers a cleaner aesthetic and allows for better cable management in custom build systems.

Twins_Pro PSU

Power cord locking device

The Twins Pro series features a power cord locking device that secures the power cord from accidental disconnect helping to ensure stable operation without any system interruptions.

Twins_Pro Power Cord Locking Device
Guardian logo

FSP Guardian

Proprietary user interface software that monitors status in real-time

Guardian display

The Twins PRO series can be connected to a USB header and synced with the FSP Guardian software to monitor power input, power output, efficiency, and other internal records in real-time. The FSP Guardian software can warn users when temperatures reach certain levels by alerting them immediately with warning messages that will update the user with all of the latest information in real-time.

Ideal for home, mail or web server systems

The Twins Pro series is an ATX PS2 size redundant power supply. The Twins Pro does not have front-end brackets, which makes it an ideal power solution for a home cloud server, mail server, or a small to medium-sized enterprise (SME)  web server.

mail or web server system
Twins_Pro in case
situation pic


AC Input100-240Vac~  8-4A  50-60Hz
DC Output+3.3V+5V+12V-12V+5Vsb
Max Output Current20.0A20.0A41.76A0.5A3.0A
Max Combined Power130W   
Total Power500W


AC Input100-240Vac~  8-4A  50-60Hz
DC Output+12V⎓43.3A+5Vsb⎓3.0A
Total Power720W


 atx cable 24 pinEPS 4 4 pinpcie 6+2 pinhd statmolex2.5 floppy
ATX 20+44+4 PINPCI-E 6+2SATAMolex
Molex to Floppy Cable


Model FSP500-50RAB
Rated Output Power 500W
Form Factor PS2 ATX Redundant
80 PLUS Certification GOLD
Input Voltage 100-240 Vac
Input Current 8-4 A
Input Frequency 60-50 Hz
PFC Active PFC
Efficiency 90%
Fan Type Dual ball bearing fan, 40mm
Dimensions(L x W x H) 190 x 150 x 86 mm
Protection OCP, OVP, SCP, OPP, OTP, FFP, UVP

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