What Is the Radio Equipment Directive (RED)? Scope, Testing, and CE Compliance

The Radio Equipment Directive, commonly known as RED, is the European Union regulatory framework for radio equipment placed on the EU market. Its principal legal basis is Directive 2014/53/EU.

RED applies to products that intentionally transmit or receive radio waves for radio communication or radio determination. Its essential requirements cover health and safety, electromagnetic compatibility, and the effective and efficient use of radio spectrum. The directive has applied since June 13, 2016, replacing the former R&TTE Directive.

Which Products May Be Covered by RED?

Products commonly requiring RED assessment include:

• Wi-Fi and Bluetooth devices
• Smartphones, tablets, and wearable electronics
• Wireless routers and networking equipment
• RFID and NFC equipment
• Wireless sensors and industrial IoT devices
• Cellular communication products
• Radio-controlled equipment
• Wireless medical or monitoring devices
• GNSS and GPS receivers
• Electronic products containing integrated radio modules

Applicability depends on the product’s actual functions and intended use. A product with an installed wireless module may still require a final-product assessment because the antenna, enclosure, PCB layout, power supply, firmware, and operating configuration can affect radio and EMC performance.

What Are the Essential Requirements of RED?

The safety requirement under RED refers to the safety objectives of the Low Voltage Directive but applies without the LVD minimum voltage limits. Battery-powered and other low-voltage wireless devices may therefore remain subject to RED safety requirements.

What Tests Are Commonly Required for RED Compliance?

There is no single RED test package for every wireless product. Applicable testing depends on the wireless technology, frequency band, transmitting power, antenna configuration, product category, and intended operating environment.

The applicable limits and procedures must be determined using the standards and legal requirements relevant to the product’s technology and intended market.

How Is RED Related to CE Marking?

Radio equipment covered by RED generally requires CE marking before it can be placed on the EU market.

The manufacturer is normally responsible for:

• Determining whether RED applies
• Identifying all other applicable EU legislation
• Conducting a product risk assessment
• Selecting applicable harmonised standards
• Completing safety, EMC, RF, and exposure evaluations
• Preparing technical documentation
• Issuing the EU Declaration of Conformity
• Affixing CE marking
• Maintaining production conformity

CE marking is not a certificate issued by an EU authority. By affixing CE marking, the manufacturer declares that the product complies with all applicable EU requirements.

Depending on the product, RoHS, battery, ecodesign, machinery, medical-device, or other legal requirements may apply in addition to RED.

Is a Notified Body Always Required?

No.

When the manufacturer fully applies relevant harmonised standards covering the applicable essential requirements, internal production control may be available as a conformity-assessment route.

A Notified Body may become relevant when:

• Applicable harmonised standards are unavailable
• Standards are only partially applied
• Alternative technical specifications are used
• The manufacturer selects EU-type examination
• Additional independent conformity assessment is required by the selected procedure

A third-party laboratory can conduct testing and provide technical reports, but the manufacturer placing the product on the market retains responsibility for the final conformity assessment and EU Declaration of Conformity.

What Are Harmonised Standards?

Harmonised standards provide technical methods for demonstrating compliance with specific RED requirements.

When a standard reference is published in the Official Journal of the European Union and correctly applied, it may provide a presumption of conformity for the requirements covered by that standard.

However, standard references may be amended, restricted, or withdrawn. Manufacturers should check the latest Official Journal publications rather than relying only on standards used in an earlier product or test report. The European Commission’s RED standards page includes amendments published through 2025.

Does a Certified Wireless Module Make the Finished Product Compliant?

Not automatically.

Existing module documentation can reduce the amount of additional evaluation required, but integration into a finished product may alter:

• Antenna type and gain
• Antenna position
• Enclosure characteristics
• Grounding and shielding
• PCB layout
• Power-supply noise
• Radio firmware
• Simultaneous transmission modes
• EMC performance
• Human exposure conditions

The manufacturer should review whether the module is being used within its approved conditions and whether additional testing or engineering evaluation is required for the final product.

What Cybersecurity Requirements Apply under RED?

Since August 1, 2025, specific categories of radio equipment have been subject to activated RED requirements relating to network protection, personal data and privacy, and protection from fraud.

These requirements may apply to certain:

• Internet-connected radio equipment
• Wearable equipment
• Childcare equipment
• Equipment processing or transferring money, monetary value, or virtual currency

The European Commission has also published harmonised-standard references supporting these cybersecurity requirements. Because the relationship between RED cybersecurity provisions and the Cyber Resilience Act is continuing to develop, manufacturers should confirm the latest applicable legislation and transition arrangements for each project.

What Is the EU Common Charger Requirement?

The EU common-charger rules were introduced through amendments to RED.

USB-C charging requirements have applied since December 28, 2024 to specified portable equipment, including handheld mobile phones, tablets, digital cameras, headphones, headsets, portable speakers, handheld video-game consoles, e-readers, earbuds, keyboards, mice, and portable navigation systems.

The requirements have also applied to laptops since April 28, 2026. They include USB-C charging interfaces, harmonised fast-charging technology, charging information, and provisions allowing consumers to purchase certain equipment without a charging device.

Common RED Compliance Misunderstandings

A CE-marked radio module makes the complete product CE compliant

Not necessarily. Final-product design and integration can affect RF, EMC, safety, and exposure performance.

Battery-powered products are outside RED safety requirements

Incorrect. RED safety requirements apply without the minimum voltage thresholds used by the LVD.

RED only evaluates wireless transmission power

Incorrect. RED may involve health and safety, EMC, spectrum use, RF exposure, cybersecurity, charging interfaces, and other requirements.

Passing laboratory tests completes the entire compliance process

Incorrect. Testing must be supported by technical documentation, a risk assessment, the EU Declaration of Conformity, labelling, instructions, and production controls.

RED replaces RoHS

No. RED and RoHS have different objectives. A wireless product may need to comply with both directives and other applicable EU legislation.

Summary

The Radio Equipment Directive is the primary EU market-access framework for wireless and radio-enabled equipment. Its main requirements cover health and safety, electromagnetic compatibility, and effective use of radio spectrum.

RED compliance should be considered during the early stages of product development. Antenna selection, RF layout, power design, shielding, enclosure structure, cables, connectors, firmware, and wireless operating modes can all affect the final compliance result.

Manufacturers should not rely solely on a wireless-module certificate or a single laboratory report. The completed product must be evaluated under its actual design and operating conditions, supported by current standards, technical documentation, an EU Declaration of Conformity, and appropriate production controls.

Official Regulatory References

European Commission — Radio Equipment Directive

EUR-Lex — Directive 2014/53/EU, Consolidated Version

European Commission — Harmonised Standards for Radio Equipment

European Commission — EU Common Charger

Technical Support from SyncTronics

SyncTronics provides technical support for evaluating connectors, cables, wire harnesses, and electromechanical components according to wireless functions, signal interfaces, transmission requirements, operating environments, and project specifications.

Support may include reviewing cable shielding, grounding methods, signal integrity requirements, connector configurations, power connections, antenna-related interconnects, and supplier technical documentation.

SyncTronics supports High-Mix, Low-Volume electronic interconnect solutions.

For IoT devices, wireless communication equipment, industrial control systems, networking products, and other projects intended for the European market, SyncTronics can assist with product selection, specification verification, New Product Introduction (NPI), OEM/ODM customization, and wire harness assembly evaluation.

Final responsibility for RED applicability, conformity assessment, technical documentation, the EU Declaration of Conformity, and CE marking remains with the manufacturer placing the completed product on the market.

Need Wire Harnesses, Connectors, Electromechanical Components, or Custom Solutions? Contact Us Today

Whether you are looking for connectors, cables, wire harness assemblies, electromechanical components, or complete electronic interconnect solutions, SyncTronics provides professional technical support and engineering evaluation for product selection, specification verification, New Product Introduction (NPI), OEM/ODM customization, as well as high-speed transmission, high-reliability, and other specialized application requirements.

We welcome you to visit our Contact Us page and share your project requirements and contact information. Our team is committed to responding quickly and professionally, evaluating the most suitable products and electronic interconnect solutions based on your product specifications, application requirements, and project objectives. We also provide technical recommendations and customized engineering support to help shorten product selection and development time, reduce project risks, and accelerate your path to mass production. We look forward to the opportunity to work with you and provide reliable technical support and practical solutions for every stage of your project.

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This content is compiled based on publicly available information and industry experience, intended solely for reference during technical exchanges. It does not constitute any commercial, technical, or legal advice or basis.

The specifications, materials, manufacturing processes, application methods, and related information described herein may vary due to differing design conditions, environmental factors, or usage scenarios. No guarantees are made regarding the completeness, correctness, or suitability of such content.

Readers should verify the suitability with the responsible design or technical personnel based on actual application scenarios, and independently assess all associated risks.