IBM 12J1446 AC Power Adapter 10VDC 2.2A External Supply

IBM 12J1446 AC Power Adapter 10VDC 2.2A External Supply

The IBM 12J1446 is an external AC power adapter designed to provide regulated direct current output for IBM computing equipment and peripherals. This compact desktop power supply converts standard AC line voltage to a stable 10VDC output at 2.2A maximum current, delivering 22 watts of continuous power. The adapter is suitable for powering external drives, terminals, and other IBM-branded peripherals from that era.

Specifications & What's Included

• Model: IBM 12J1446
• Output Voltage: 10VDC
• Output Current: 2.2A
• Power Output: 22W
• Input Voltage: 100–240V AC, 50/60Hz (universal mains)
• Form Factor: External desktop power supply
• Connector: External (proprietary IBM connector)
• Manufacture Country: Japan

Applications

This adapter was commonly used to power external peripherals and expansion devices in IBM's computing ecosystem, particularly with the System/3, System/23 Datamaster, and various IBM terminal and storage subsystems of the 1980s and early 1990s. External power adapters like this were a standard solution for isolated low-voltage DC distribution before integrated internal power supplies became universal. The 10VDC/2.2A specification makes this suitable for legacy IBM equipment requiring moderate auxiliary power, and it remains useful for vintage computer restoration, retro-computing projects, and compatibility with original IBM peripheral configurations.