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Compact TFX power supply unit, silver metal casing, 80mm fan grille visible

myVolts

myVolts TFX Power Supply 350W 420W Max Dell Liteon PS-5251-5

SKU CH-PRE3-2S8NS

TFX power supply delivering 350 W continuous and 420 W peak for Dell Liteon PS-5251-5 small-form-factor desktops

  • TypeAT
  • Replaces Dell Liteon PS-5251-5 units directly
  • Delivers 350 W continuous and 420 W peak power
  • Fits slimline and SFF chassis with TFX form factor
  • Runs on 100 to 240 V input worldwide
  • Includes 20+4 pin, 4-pin CPU, Molex, floppy and SATA connectors

myVolts TFX 350W Replacement PSU

This myVolts TFX power supply delivers a continuous 350 W output with a 420 W peak rating. It is designed to replace the Dell Liteon PS-5251-5 unit in slimline and small-form-factor desktops. The AT-type form factor fits the same chassis cut-out as the original 200 W, 250 W, 300 W or 350 W models. Builders upgrading an aging Dell SFF system will find a direct mechanical and electrical match.

Sustained-load behaviour

The unit is rated for 350 W continuous power rather than only a short burst. An 80 mm double ball-bearing fan provides active cooling during extended workloads. Input voltage auto-ranges from 100 V to 240 V, so the supply maintains stable rails across different mains conditions. The peak capacity of 420 W handles brief transients without tripping protection circuits.

Installation notes

The cable harness includes a 20+4 pin motherboard connector, a 4-pin CPU plug, two Molex, a floppy connector and two SATA leads. Match each plug to the corresponding socket on the motherboard and drives; the keyed headers prevent mis-insertion. The TFX enclosure slides into the existing bracket and secures with the original screws. Builders needing additional SATA or PCIe connectors beyond the supplied set will require adapter cables.

I korthet

  • Replaces Dell Liteon PS-5251-5 units directly
  • Delivers 350 W continuous and 420 W peak power
  • Fits slimline and SFF chassis with TFX form factor
  • Runs on 100 to 240 V input worldwide
  • Includes 20+4 pin, 4-pin CPU, Molex, floppy and SATA connectors

Specifikationer

TypeAT

Frågor om den här produkten

How loud is the 80 mm fan under continuous load?

The 80 mm double ball-bearing fan runs quietly at idle and increases speed only when the 350 W load demands extra airflow.

Which motherboard and CPU connectors are required for the TFX unit to power on?

The unit provides a 20+4 pin ATX motherboard connector and a 4-pin CPU connector; both must be seated for the system to start.

Will the 20+4 pin and 4-pin CPU cables reach the headers on a legacy Dell SFF board?

Cable lengths follow the TFX form factor, matching the routing of the original PS-5251-5 in Dell slimline and SFF chassis.

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