CPI CPI-1200 200W AT XT Computer Power Supply Dual Voltage 110/220V External

CPI CPI-1200 200W AT XT Computer Power Supply Dual Voltage 110/220V External Switch

The CPI CPI-1200 is a 200-watt AT/XT form-factor power supply designed for IBM XT, IBM AT, and compatible vintage personal computers. It features a dual-voltage input (120/220VAC, 50/60Hz) that allows operation on both North American and European power standards, and an externally mounted rocker-style on/off switch — a feature common to full-size AT-era desktop cases where the power switch mounts on the case front panel separately from the PSU body.

Specifications & What's Included

• Model: CPI-1200
• Form Factor: AT/XT
• Maximum Output Power: 200W
• Input Voltage: 120/220VAC, 50/60Hz (dual voltage)
• Maximum Input Power: 320VA
• Output +5V: 20A
• Output +12V: 8A
• Output -12V: 0.25A
• Output -5V: 0.3A
• Power Switch: External rocker on/off switch (mounts to case)
• Cooling: Internal fan
• Output Connectors: Multiple Molex 4-pin peripheral connectors and AT motherboard power connectors
• Input Connector: IEC C14 AC inlet (rear)
• Housing: Steel chassis

Applications

AT and XT form-factor power supplies like the CPI-1200 were the standard in IBM PC-compatible desktop computers from the early-to-mid 1980s through the early 1990s, powering machines such as the IBM XT (5160), IBM AT (5170), and the wide range of compatible clone systems built to those standards. The AT form factor preceded the ATX standard (introduced in 1995) and differs in both physical mounting dimensions and the motherboard power connector — AT supplies use two 6-pin connectors (P8 and P9) rather than the single 20- or 24-pin ATX connector. The dual-voltage 110/220V input on this unit made it suitable for international deployment. Today, these supplies are sought by vintage computer collectors and restorers maintaining working XT/AT-era systems, where original-spec power supplies are increasingly hard to find.