Apple 631-5105-A Power Supply SE SE/30 661-0370 90W Desktop

Apple 631-5105-A Power Supply SE SE/30 661-0370 90W Desktop

The Apple 631-5105-A is a 90-watt internal power supply unit designed for the Macintosh SE and SE/30 desktop computers. This original Apple power supply provides the regulated voltage and current required to operate these classic Macintosh systems and was the standard replacement power supply for both models during their operational lifespan in the late 1980s.

Specifications & What's Included

• Model: 631-5105-A
• Part Number: 661-0370
• Power Output: 90 watts
• Compatible with: Macintosh SE, Macintosh SE/30
• Form Factor: Desktop internal power supply
• Connector: Apple proprietary internal connector
• Voltage: Regulated output for SE/SE/30 specifications
• Condition: Tested and working

Applications

The Macintosh SE and SE/30 were pivotal systems in Apple's desktop lineup during the late 1980s, serving as the primary affordable Macintosh models for home and small office use. These computers powered word processing, graphic design, and early desktop publishing workflows. The 631-5105-A power supply is the original OEM replacement for either model and is commonly sought by restoration enthusiasts and collectors rebuilding these classic systems. If your SE or SE/30 has developed power supply issues, this unit provides a direct replacement with the correct specifications and physical form factor.