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Rectangular silver server PSU with fan grille and 4+8 pin connectors

WMtec

WMtec 240 W server power supply for Dell OptiPlex 3040 5040 7040 SFF

SKU CH-KBGP-PC2F5

A 240 W replacement unit for OptiPlex 3040, 5040 and 7040 SFF systems, delivering dual 12 V rails with active PFC across 100-240 V input

  • Powers OptiPlex 3040 5040 7040 SFF desktops
  • 240 W output with active PFC for stable delivery
  • Dual 12 V rails support CPU and peripherals
  • 100–240 V input works worldwide
  • Compact 6.2 × 21.8 cm chassis fits SFF cases

240 W SFF replacement PSU

This WMtec unit is a 240 W server power supply built for Dell OptiPlex 3040 5040 7040 SFF chassis. It accepts 100-240 V input and delivers dual 12 V rails with active PFC. The 4-pin plus 8-pin connector layout matches the original Dell pinout. It targets IT staff maintaining fleets of these small-form-factor desktops.

Direct swap for failed B240AM-00 units

It replaces the factory B240AM-00, AC240AS-02, HU240AM-00, HU240AS-00, H240AM-02, D240EP N-00 and other listed Dell part numbers. The jump is worth it when the original supply fails or shows voltage instability under load. No firmware or BIOS update is required because the pinout and power rating are identical to the OEM specification.

Fits 6.2 by 21.8 cm SFF bays

The supply measures 6.2 by 21.8 cm and slides into the existing OptiPlex SFF bay without adapter brackets. Its 4-pin and 8-pin cables connect directly to the motherboard and drive backplane. Active PFC reduces harmonic draw on shared office circuits. Builders needing higher wattage or modular cables for custom GPU upgrades cannot use this unit.

Highlights

  • Powers OptiPlex 3040 5040 7040 SFF desktops
  • 240 W output with active PFC for stable delivery
  • Dual 12 V rails support CPU and peripherals
  • 100–240 V input works worldwide
  • Compact 6.2 × 21.8 cm chassis fits SFF cases

Specifications

No published specifications for this item yet.

Questions about this item

Will the 6.2 by 21.8 cm unit fit my OptiPlex 3040 SFF chassis?

The supply measures 6.2 by 21.8 cm and is listed for OptiPlex 3040, 5040 and 7040 SFF models, so it matches the standard SFF form factor.

Which cables must I connect during installation, and which one is often missed?

Plug in both the 4-pin and the 8-pin connectors; the 4-pin CPU power lead is the one most frequently overlooked.

When should I expect to replace the 240 W supply in my 7040 SFF?

A 240 W unit with active PFC and dual 12 V rails typically lasts several years; plan a swap if the system becomes unstable under load or the fan noise increases.

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