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Grey ATX power supply unit with single fan and cable bundle

Replace Power

Replace Power AP-MPS3ATX30-18 300W ATX power supply

SKU CH-6EDC-2KJQY MPN AP-MPS3ATX30-18

A 300W ATX replacement unit with one fan, a 20+4-pin main connector, a 4-pin ATX12V connector, two peripheral connectors, a floppy connector and three SATA connectors

  • Fan configuration1
  • Product colorGrey
  • Product typeATX
  • Product weight0.1
  • Direct replacement for Bestec ATS-150 and ATX-1956D Rev B2 units
  • 300 W output keeps your system running reliably
  • Low ripple and noise protects sensitive components
  • Over-voltage protection guards connected hardware
  • 20+4-pin ATX, 4-pin ATX12V, three SATA, two peripheral and one floppy connector included

Direct replacement for Bestec ATS-150 units

This 300W ATX power supply replaces Bestec ATS-150 ATX0300D5WC Rev A and ATX-1956D Rev B2 units. It fits systems that originally shipped with those specific models. The grey enclosure holds a single fan and weighs 0.1 kg.

Standard ATX connector set for legacy builds

The unit provides one 20+4-pin ATX connector, one 4-pin ATX12V connector, two peripheral connectors, one floppy connector and three SATA power connectors. This layout supports older motherboards and a mix of IDE and SATA drives without adapters.

Steady 300W output with protection circuits

High efficiency and low ripple and noise keep voltage stable during continuous operation. Output over voltage protection shuts the unit down if rails exceed safe limits. The single fan maintains airflow across the power module under sustained load.

How it compares

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

Price $65.99
Cheaper than about 81% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Brand nameReplace Power
Model nameAP-MPS3ATX30-18
Product colorGrey
Product typeATX
More details
Fan configuration1

Questions about this item

How much continuous power does the 300W unit deliver before it hits its limit?

The supply is rated for 300W of steady output, so sustained loads up to that level are within its design envelope.

What noise or heat should I expect when the single fan runs all day?

One built-in fan handles cooling; the unit is specified for low ripple and noise under normal desktop loads.

Which existing connectors must my motherboard and drives already have to use this PSU?

Your board needs a 20+4-pin ATX socket and a 4-pin ATX12V plug; drives require three SATA, two peripheral and one floppy power connector.

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