Description
Unbranded 250W ATX Power Supply 386 486 Pentium 115/230V Molex
This is a generic 250-watt ATX-form-factor switching power supply designed for vintage IBM-compatible desktop computers including 386, 486, and early Pentium systems. The unit accepts dual-voltage AC input at 115V or 230V (selectable, 50/60 Hz) and delivers regulated DC output across multiple voltage rails via a 12-pin AT motherboard connector and multiple Molex 4-pin peripheral drive connectors.
Specifications & What's Included
- Model: ATX (MPN: LC-250ATX)
- Maximum Output Power: 250W
- AC Input Voltage: 115V / 230V selectable, 50/60 Hz
- DC Output +3.3V: 10A maximum
- DC Output +5V: 20A maximum
- DC Output +12V: 9A maximum
- Negative Rails: -5V, -12V available
- Standby Output: +5VSB
- Peak Total Output: 125W
- Motherboard Connector: 12-pin AT (configured as two 6-pin cables)
- Peripheral Connectors: Multiple Molex 4-pin drive connectors
- Form Factor: AT desktop enclosure
- Photo is an example only — you will receive a similar unit of comparable specification, which may differ in brand
Applications
ATX-form-factor power supplies of this type were the standard in IBM-compatible desktop PCs from the mid-1980s through the mid-1990s, powering systems built around 286, 386, 486, and first-generation Intel Pentium processors. The 12-pin AT motherboard connector and Molex peripheral connectors were the industry standard for power distribution in these legacy systems. These units remain popular in the retro computing community for restoration projects, vintage PC builds, and system replacements. The dual 115/230V input option made them suitable for both North American and international deployments in business, laboratory, and home computing environments.
This Unbranded 250W ATX desktop power supply has been powered on and tested at our facility and is confirmed to be in good working order. The unit delivers stable DC output across all voltage rails and the complete connector harness—including the 12-pin AT motherboard connector and multiple Molex 4-pin drive connectors—is present and functional. Cosmetic wear is consistent with age, including minor surface marks and patina, but the unit is structurally sound. Photo is an example only — you will receive a similar unit of comparable specification, which may differ in brand. Please view our photo set and contact us if you have any questions. Please note: We have multiple units in stock — yours may not be the one shown in the photos, however, it will be similar in condition and function.
Warranty Information
Additional Information
Brand: |
Unbranded |
Model: |
ATX |
MPN: |
LC-250ATX |
SKU: |
29413 |
Condition: |
Used – Tested and Working |
Seller Notes: |
Photo is example only — you receive a similar unit. Includes 12-pin AT motherboard connector harness and Molex drive connectors. |
Form Factor: |
AT Desktop |
Power Output: |
250W Max |
AC Input Voltage: |
115V / 230V AC, 50/60Hz selectable |
Frequency: |
60/50 Hz |
Motherboard Connector: |
12-pin AT (dual 6-pin cables) |
Drive Connectors: |
Multiple Molex 4-pin connectors |
Output Voltages: |
+3.3V, +5V, +12V, -5V, -12V, +5VSB |
Max DC Output +3.3V: |
10A |
Max DC Output +5V: |
20A |
Max DC Output +12V: |
9A |
Peak Output Total: |
125W |
Compatible With: |
IBM-compatible 386, 486, early Pentium systems |
Power Supply Type: |
ATX Switching Power Supply |
Country of Manufacture: |
Unknown |
Condition Notes: |
Unbranded 250W ATX Power Supply tested and confirmed working. All voltage rails stable, complete connector harness included. Minor cosmetic wear, structurally sound. Example photo shown; you receive similar unit. |
Type: |
ATX Switching Power Supply |
Output Voltage +3.3V: |
+3.3V @ 10A |
Output Voltage +5V: |
+5V @ 20A |
Output Voltage +12V: |
+12V @ 9A |
Negative Voltages: |
-5V, -12V, +5VSB |
