The energy efficiency rating of an ITE (Information Technology Equipment) power adapter typically refers to how efficiently the adapter converts electrical power from the mains supply to the low voltage required by the device it powers. This rating is usually expressed in terms of efficiency levels set by various regulatory standards and programs.

Common Efficiency Standards

Energy Star

A program run by the U.S. Environmental Protection Agency (EPA) that sets criteria for energy efficiency. Adapters that meet these criteria can bear the Energy Star label.

European Code of Conduct

Sets efficiency requirements for external power supplies sold in Europe.

Level VI Efficiency

Established by the U.S. Department of Energy (DOE), it represents the latest and most stringent set of standards for energy efficiency in power adapters.

• Requirements: Both active mode efficiency and no-load power consumption must meet strict limits.

ErP (Energy-related Products) Directive

A European Union directive that aims to improve the environmental performance of products, including power supplies, throughout their lifecycle.

Interpreting Efficiency Levels

An ITE power adapter will have a specific efficiency rating indicated on its label, often in the form of a Roman numeral (e.g., Level V, Level VI). The higher the level, the more energy-efficient the adapter is.

• Level V: Specifies minimum efficiency standards for power adapters, including no-load power consumption and active mode efficiency.
• Level VI: Tightens these standards further, reducing allowed no-load power consumption and increasing active mode efficiency requirements.

How to Find the Efficiency Rating

To find the exact efficiency rating of a particular ITE power adapter, you can:

• Look for a label or marking on the adapter itself.
• Check the product documentation.
• Refer to the manufacturer’s specifications.