Commodore VIC-20 Original Power Adapter Part Number

This article identifies the specific part number for the original Commodore VIC-20 power adapter, along with essential voltage and current specifications needed for safe operation. Readers will learn how to identify the correct power supply to avoid damaging their vintage hardware and where to find compatible replacements if the original unit is unavailable.

The Official Part Number

The original power adapter for the Commodore VIC-20 in the North American market is most commonly associated with the part number 10010401. This specific unit was shipped with the system during its initial production run. However, collectors should be aware that part numbers may vary slightly depending on the region of manufacture and distribution. For example, PAL region units used in Europe and Australia utilized different transformers to accommodate 220V input standards, resulting in different labeling despite similar output requirements.

Critical Electrical Specifications

While the part number is useful for identifying original hardware, the electrical specifications are the most critical factor when seeking a replacement. The Commodore VIC-20 requires a 5V DC power supply with a minimum current rating of 1.2 amps. The connector polarity must be center positive. Using a power supply with incorrect voltage or polarity can cause immediate and irreversible damage to the computer’s voltage regulator and motherboard.

Compatibility Warnings

A common mistake among vintage computing enthusiasts is attempting to use a Commodore 64 power supply with a VIC-20. The original Commodore 64 power supply outputs 9V AC and 5V DC, which is incompatible with the VIC-20’s strict 5V DC requirement. Even the later Commodore 64C power supply, which outputs only 5V DC, often lacks the sufficient amperage stability preferred by the VIC-20. Always verify the output label on any replacement adapter matches the 5V DC 1.2A specification before connecting it to the system.

Sourcing Replacements

Finding a new old stock unit with the original 10010401 part number can be difficult and expensive. Most users opt for modern regulated switching power supplies that match the required 5V DC 1.2A center-positive specifications. When purchasing a third-party adapter, ensure the plug size fits the VIC-20 power port, which is typically a 5.5mm x 2.1mm barrel connector. Properly matching these specifications ensures the longevity of the vintage system without relying on scarce original components.