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Rectangular silver server PSU with rear fan grille and power socket

WMtec

WMtec 45J9446 45J9447 240W server power supply

SKU CH-R0AM-BT1PV

240 W replacement PSU for ThinkCentre M57, M58 and M90/90P desktops, accepting 100–127 V or 200–240 V input

  • 240 W maximum output powers compatible ThinkCentre systems
  • Replaces part numbers 45J9446 and 45J9447 for exact fit
  • Works with M57, M58, M90 and 90P models
  • Auto-ranging input accepts 100-127 V and 200-240 V worldwide
  • Draws 8.0 A at low voltage or 4.0 A at high voltage

Compatible replacement for ThinkCentre M57 M58

This 240 W server power supply is built as a direct replacement for ThinkCentre M57 M58 M90/90P desktops. It matches the original part numbers 45J9446 and 45J9447 so the unit fits the chassis and connects to the existing wiring without adapters. Buyers restoring or repairing those specific models receive a new component that restores factory power delivery.

Ready to install with no extra parts

The unit ships as a complete power supply module; no separate cables, mounting brackets or software are included or required. Installation consists of removing the old supply, sliding this one into the same bay and reconnecting the standard motherboard and drive connectors. The absence of additional accessories keeps the process straightforward for technicians and DIY owners alike.

240 W maximum output with wide-range input

The supply delivers up to 240 W and accepts 100-127 V at 8.0 A or 200-240 V at 4.0 A, both at 50-60 Hz. This input range covers common office and data-centre voltages worldwide. Systems that demand more than 240 W or require a different form factor will need a different power solution.

Highlights

  • 240 W maximum output powers compatible ThinkCentre systems
  • Replaces part numbers 45J9446 and 45J9447 for exact fit
  • Works with M57, M58, M90 and 90P models
  • Auto-ranging input accepts 100-127 V and 200-240 V worldwide
  • Draws 8.0 A at low voltage or 4.0 A at high voltage

Specifications

No published specifications for this item yet.

Questions about this item

How often will the internal fan in this 240W unit need cleaning or replacement?

The fan is a sealed component inside the power supply; no user-service schedule is published, so plan to replace the whole unit if airflow drops or noise rises.

What limit appears first when this supply runs continuously at full 240W load?

The 240W maximum output rating is the hard ceiling; sustained loads at that level will hit the power limit before any thermal or current threshold.

How much heat and noise should I expect when this PSU powers a ThinkCentre M57 all day?

At 100-127V it draws up to 8.0A and at 200-240V up to 4.0A; waste heat and fan noise will scale with the actual load, not the peak rating.

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