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Rectangular metal power supply unit with single cooling fan and fixed cable bundle

Foxconn

Foxconn HH-400UNEA 300 W ATX12V 2.2 power supply

SKU CH-1XKC-CEA21 MPN HH-400UNEA

A 300 W ATX12V 2.2 unit with dual 12 V rails, a 20+4 pin main connector, two SATA plugs and a 100,000 hour MTBF rating

  • Max wattage300 W
  • Modular cablingNo
  • Fan configuration1
  • Main power connector20+4Pin
  • 12V rails2
  • Supply voltage115 / 230 V
  • Reliable 300 W output for standard desktop builds
  • Dual +12 V rails deliver stable power to CPU and peripherals
  • Broad 115 / 230 V input suits worldwide mains
  • 20+4 pin main connector fits modern and legacy motherboards
  • MTBF over 100000 hours indicates long service life

Entry-level 300 W ATX12V 2.2 unit

The Foxconn HH-400UNEA delivers 300 W through dual +12 V rails rated at 11 A and 15 A. It targets basic office builds or replacement jobs where a PCI-Express power lead is not required.

Fixed cable set shapes installation

A 20+4 pin main connector, one 12 V P4 lead, three peripheral plugs, two SATA headers and a floppy connector are permanently attached. The non-modular layout means unused cables stay in the case and must be routed around other components.

ATX12V 2.2 spec caps expansion

The 2.2 standard limits combined +12 V output and omits native PCI-Express power, so graphics cards needing a six-pin or eight-pin feed cannot be used. Input range covers 115 V and 230 V at 50/60 Hz for worldwide mains compatibility.

How it compares

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

Price $16.99
Cheaper than about 97% of the 10,869 comparable items (median $142.99).
Max wattage 300 W
Lower than about 92% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameFoxconn
Model nameHH-400UNEA
Product typeATX12 V Ver2.2
Graphics
SLI supportNo
CrossFire supportNo
Ports & slots
PCIe power connectorsNo
Output type+3.3 V@21A,+5 V@18A,+12V1@11A,+12V2@15A
Connection types1 x Main connector (20+4Pin)
1 × 12 V(P4)
3 x peripheral
2 x SATA
1 x Floppy
Power
Max wattage300 W
Modular cablingNo
Main power connector20+4Pin
12V rails2
Supply voltage115 / 230 V
AC input frequency50/60 Hz
Rated input current8A @ 115 V, 4A @ 230 V
Size & build
Shipping weight1.52 kg
Package size210 × 203 × 102 mm
Environment & compliance
Regulatory approvalsUL, CUL, CSA, TUV, CB, BSMI
More details
Fan configuration1
Mean time between failures>100,000 h

Questions about this item

How long is the unit rated to run before a failure becomes likely?

The mean time between failures is rated at more than 100,000 hours of operation.

Which rail hits its current ceiling first when the load stays high?

The +12V1 rail is limited to 11 A, so it reaches its maximum before the +12V2 rail at 15 A.

How much heat and noise should I expect from the single fan during continuous use?

With a 300 W maximum output and one non-modular fan, sustained loads will push the fan to higher speeds, increasing both airflow noise and exhaust temperature.

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