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Grey ATX power supply unit with single fan

Replace Power

Replace Power AP-MPS3ATX30-12 300 W ATX power supply for Dell Inspiron 518 537 545

SKU CH-T9B5-KVD9F MPN AP-MPS3ATX30-12

300 W ATX unit with 20+4-pin, 4-pin CPU, three SATA, two peripheral and one floppy connector for Dell Inspiron 518, 537, 545

  • Fan configuration1
  • Product colorGrey
  • Product typeATX
  • Product weight0.1
  • Direct-fit replacement for Dell Inspiron 518 537 545
  • 300 W steady output powers typical desktop builds
  • High efficiency with low ripple and noise
  • Over-voltage protection guards connected components
  • Full connector set: 20+4 ATX, 4-pin CPU, three SATA, peripheral, floppy

Direct replacement for Dell Inspiron 518 537 545

This 300 W ATX unit replaces the original power supply in Dell Inspiron 518 537 and 545 desktops. It delivers the standard voltages those systems expect without modification. The grey enclosure fits the existing chassis mounting points. Builders restoring or repairing these models can install it directly.

ATX connector set limits expansion

The harness provides one 20+4 pin ATX connector, one 4 pin ATX12V connector, two peripheral connectors, one floppy connector and three SATA power connectors. No PCIe power leads are present so discrete graphics cards requiring auxiliary power cannot be used. The fixed cable count also restricts the number of drives and peripherals that can be powered simultaneously.

Single fan cooling in a compact frame

A single fan handles thermal management for the 300 W output. The lightweight construction at 0.1 kg eases handling during installation. Standard ATX screw spacing aligns with common chassis mounts. Grey finish matches typical office chassis aesthetics. The connector mix reflects the needs of legacy Dell workstations rather than modern high-density builds.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $66.99
Cheaper than about 81% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Brand nameReplace Power
Model nameAP-MPS3ATX30-12
Product colorGrey
Product typeATX
More details
Fan configuration1

Questions about this item

Should I pick this 300 W unit or a higher-wattage model for my Dell Inspiron 518?

Choose this 300 W unit if your Dell Inspiron 518, 537 or 545 originally shipped with a 300 W supply; it matches the factory rating and connector layout.

What does the 300 W rating deliver inside my Inspiron 537?

It provides up to 300 W of steady power across the 20+4-pin ATX, 4-pin ATX12V, two peripheral, one floppy and three SATA connectors for the original components.

Will the ATX 20+4-pin and 4-pin ATX12V connectors fit my Inspiron 545 motherboard?

Yes, the 20+4-pin ATX and 4-pin ATX12V connectors match the standard ATX layout used in the Inspiron 518, 537 and 545 boards.

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