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ATNG Power Co

ATNG AT-300 300W ATX Desktop Power Supply 115V/230V 20-Pin AT Form Factor

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SKU:
15151
MPN:
AT-300
Condition:
Used
Availability:
Usually ships within 1-2 business days.
Weight:
5.00 LBS
Shipping:
Calculated at Checkout
  • ATNG AT-300 300W ATX power supply rear panel showing IEC C14 inlet, voltage selector switch, power rocker switch, and cooling fan
  • ATNG AT-300 300W ATX power supply side and top view showing vented housing with 20-pin ATX and Molex peripheral harnesses
  • ATNG AT-300 ATX power supply wire harness showing 20-pin main connector and 4-pin Molex peripheral connectors
  • ATNG AT-300 300W specification label showing AC input 115V/230V switchable, DC output voltages, current ratings, and UL/CSA certifications
$40.00
Was: $80.00
Current Stock: 1

Sold Out

Description

ATNG AT-300 300W ATX Desktop Power Supply 115V/230V 20-Pin AT Form Factor

Used desktop power supply unit rated at 300W (150W max DC output). Features switchable 115V/230V input and delivers multiple DC voltage rails through a standard 20-pin ATX connector.

Specifications & What's Included

  • Power Rating: 300W (150W max DC output)
  • Input: AC 115V/230V switchable, 50–60 Hz
  • DC Outputs: +3.3V, +5V, +12V, -5V, -12V, +5VSB
  • Main Connector: 20-pin ATX
  • Peripheral: 4-pin Molex connectors
  • Cooling: Internal rear-mounted fan
  • Input: IEC C14 connector; rear rocker power switch
  • Certifications: CSA, UL

Applications

This ATX form factor supply was designed for legacy and vintage desktop computer builds from the 1990s and early 2000s. It is compatible with standard ATX motherboards that use 20-pin connectors. Commonly used in retro PC restoration projects and systems requiring switchable input voltage for international operation.

Please note: We may have multiple units of this item in stock. The unit you receive may vary slightly from the one shown in the photos. All units are functionally equivalent and inspected to the same standard.

Condition: Used
This ATNG AT-300 300W ATX Desktop Power Supply has been tested at our facility and confirmed to be in working order. The unit powers on and functions as expected. Cosmetically, the housing shows light surface wear consistent with prior use but is otherwise in solid condition. All output harnesses and connectors are intact and in good shape as shown in the photos. Please view our photo set and contact us if you have any questions.
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Warranty Information

We stand behind every item we sell with a 30-day money-back guarantee. If your item arrives not as described, you may return it within 30 days for a full refund. Please inspect your purchase upon arrival and contact us with any questions.
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Additional Information

Brand:
ATNG Power Co
Model:
AT-300
MPN:
AT-300
SKU:
15151
Condition:
Used – Inspected and Tested
Seller Notes:
Power supply only; no additional accessories included.
Form Factor:
ATX Desktop
Power Rating:
300W (150W max DC output)
Voltage Rating:
AC Input: 115V / 230V switchable
AC Input Frequency:
50–60 Hz
AC Input Current:
8A @ 115V; 5A @ 230V
DC Output Voltages:
+3.3V, +5V, +12V, -5V, -12V, +5VSB
Main Connector:
20-Pin ATX
Peripheral Connectors:
4-pin Molex (visible in photos)
Cooling:
Internal rear-mounted fan
AC Input Connector:
IEC C14 (standard 3-pin PC inlet)
Power Switch:
Rear-mounted rocker on/off switch
Certifications:
CSA, UL (LR94521, E156513)
Compatible With:
ATX desktop computers, legacy PC builds
Country of Manufacture:
China
Condition Notes:
This ATNG AT-300 300W ATX power supply has been tested and confirmed working. Housing shows light surface wear. All harnesses and connectors are intact. Please view our photos and contact us with any questions.
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Input Current:
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Input Frequency:
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Output Rails:
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Output Current +3.3V:
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Output Current +5V:
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Output Current +12V:
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Output Current -5V:
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Connector Type:
ATX 20-pin, 4-pin ATX12V, Molex, Floppy
Cooling:
80mm fan with fan sensor control
Power Switch:
Hard on/off rocker switch on rear panel
AC Inlet:
IEC 320 C14
Compatible With:
ATX form factor desktop computers
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China
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UL, CE, FCC Class B
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Manual slide switch (115V / 230V)
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