[2025 Confirmed] What Is EU ErP Lot 7 (External Power Supply Regulation)? | Key Changes and Key Points for Power Supply Selection

A summary of the finalized details of EU ErP Lot7 (external power supply regulation), focusing on scope, implementation timing, treatment of USB PD/chargers, and design issues that commonly cause difficulties. Explains practical points useful for selecting power supplies for next-generation models.

What is EU ErP Lot 7 (External Power Supply Regulation)?

Under the EU Ecodesign framework, the group of regulations that set minimum requirements for equipment such as external power supplies (EPS), including active efficiency and no-load power consumption, is commonly referred to in the industry as "ErP Lot 7."

The current external power supply regulation is implemented as Regulation (EU) 2019/1782.

What Was "Finalized" in 2025 (Positioning of the New Regulation)

The European Commission has published a new Ecodesign Regulation (EU) 2025/2052 covering chargers, wireless charging, and USB Type-C cables in addition to external power supplies. As a result, Regulation (EU) 2019/1782 will be replaced in the future.

When Will It Apply? (Schedule)

This is the most important point in practice.

In other words, for next-generation models for the EU market developed between 2026 and 2028, it is effective to organize requirements early to avoid having to reconsider only the power supply after design completion due to a regulatory switch.

Scope: Not Only External Power Supplies but Also Chargers, Wireless Charging, and USB-C Cables

In addition to external power supplies (EPS), Regulation (EU) 2025/2052 also covers:

These are also included within the scope.

Even if you think "We only handle adapters, so it does not concern us," depending on how product specifications and bundled items are organized, the scope of consideration may expand.

Examples That May Be Excluded (Out of Scope)

Under the new regulation, definitions of exclusions are clarified, such as UPS (uninterruptible power supplies), EPS dedicated to medical devices, and equipment dedicated to transport means.

The European Commission’s explanatory pages also outline examples excluded from Regulation 2019/1782 on external power supplies.

However, even cases that appear to be "out of scope" may be treated differently depending on definitions, labeling, and sales format. Individual confirmation is recommended.

Key Points Likely to Impact Design and Power Supply Selection (Practical Perspective)

From here, we move to what truly matters on site. The common challenges in the ErP Lot 7 area typically fall into the following patterns.

1) "Currently compliant" but fails under next certification due to changed conditions

If no-load/low-load conditions or measurement rules change, evaluation results may differ even for the same power supply.

2) The more you avoid bundling and rely on market procurement, the greater the design-side responsibility

In the EU, decisions not to bundle are increasing, but even in such cases:

If these are ambiguous, post-shipment defects or evaluation issues are more likely to occur.

3) High output, USB PD, and charger domains involve more evaluation items

Since Regulation (EU) 2025/2052 expands coverage to chargers and USB-C related products, it becomes more important than before to organize matters not just as a standalone power supply but as a product system.

Frequently Asked Questions (FAQ)

Q1. When will "ErP Lot 7" become stricter?

The new Regulation (EU) 2025/2052 will apply from December 14, 2028. Depending on development timing, the next model may coincide with the transition period, so early preparation is effective.

Q2. Is only the external power supply (AC adapter) covered?

Under the new regulation, not only external power supplies but also chargers, wireless charging, and USB Type-C cables are included.

Q3. Can the currently adopted power supply (compliant with 2019/1782) continue to be used?

This depends on the product launch timing, sales format, and treatment of transitional measures. Since 2019/1782 will be replaced in the future, for next-generation model design it is safer to organize matters after reviewing the requirements of the new regulation as well.

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