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Rectangular metal ATX power supply, matte finish, single fan grille, 420W label visible

Replace Power

Replace Power RPSU-5188 420W ATX power supply

SKU CH-24R6-BAQTA MPN RPSU-5188

A 420 W ATX replacement supply with reduced depth, 20+4 pin, 4-pin 12 V, three SATA, two LP4 and one floppy connector, plus full protection circuits

  • Fan configuration1
  • Product typeATX
  • Product weight1.5
  • 420 W output replaces legacy 250 W and 300 W units
  • 20+4 pin connector supports 20-pin and 24-pin motherboards
  • Compact 5.9" depth fits tight ATX cases
  • Over current, over power, over voltage and short circuit protection
  • 110-260 V AC switchable input works worldwide

Replacement for HP Compaq legacy units

This 420 W ATX power supply replaces several older HP and Compaq units including part numbers 5188-2625, 5188-2626 and 5188-2627. It fits systems that originally shipped with Bestec, Delta, Hipro or eMachine power supplies. The built-in 20+4 pin adapter supports both 20-pin and 24-pin motherboard connectors.

Thermals noise and protection

A single fan cools the unit across an operating range of 0 °C to 50 °C at full load. Over-current, over-power, over-voltage and short-circuit protection circuits are included. The supply accepts 110 V to 260 V AC input at 50 Hz or 60 Hz without manual switching.

420 watt capacity with dual 12 V rails

The +12 V output is split into two rails each rated at 8 A, while +3.3 V delivers 11 A and +5 V delivers 12 A. Connectors provided are one ATX 20+4 pin, one P4 12 V 4-pin, three SATA 15-pin, two LP4 4-pin and one floppy 4-pin. Buyers who need higher 12 V current or additional PCIe power connectors should look elsewhere.

How it compares

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

Price $62.99
Cheaper than about 83% of the 10,869 comparable items (median $142.99).

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Specifications

Product
Brand nameReplace Power
Model nameRPSU-5188
Product typeATX
More details
Fan configuration1

Questions about this item

How do I install the 20+4 pin ATX connector and what step is often missed?

Align the 20+4 pin plug with the motherboard socket, press until the latch clicks, then attach the separate P4 12V 4-pin cable to the CPU power header; the extra 4-pin segment is often left unplugged on 24-pin boards.

What maintenance or replacement will the unit need later?

The single internal fan is the only moving part; clean dust from its intake regularly and replace the fan if bearing noise appears, otherwise the supply has no user-serviceable components.

What limit appears first under sustained full-load operation?

The +12V rails are each rated at 8 A, so the 12 V output hits its current ceiling before the overall 420 W rating is reached.

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