Free guide for manufacturers
UAS class labels C0 to C6: technical requirements
Each class label comes with a set of product requirements your drone must meet and prove in testing. Knowing them before the design freeze avoids late changes. This overview covers the requirements that most often decide the class.
Official Notified Body (Drone Certification Lab) · Classes C0 to C6 · Market access to 31 countries
Requirements by class
What each class must meet
A summary of the main requirements. The full list sits in the annex of Delegated Regulation (EU) 2019/945 and the harmonised standards.
| Class | Key requirements |
|---|---|
| C0 | MTOM under 250 g, speed and height limits, safe design without sharp edges |
| C1 | MTOM under 900 g or under 80 J, Remote ID, geo-awareness, height limit, noise limit |
| C2 | MTOM under 4 kg, low-speed mode, Remote ID, geo-awareness, mechanical strength, noise limit |
| C3 | MTOM under 25 kg, dimension under 3 m, Remote ID, geo-awareness, lost-link procedure |
| C4 | MTOM under 25 kg, no automatic control modes beyond stabilisation |
| C5 | Built on C3, adds features for STS-01 such as flight termination and selectable limits |
| C6 | Features for STS-02 such as programmable trajectory, containment and flight termination |
Simplified from Delegated Regulation (EU) 2019/945, as amended. Always check the full annex.
Remote ID
Direct remote identification broadcasts the operator number, serial number and position during flight. Required from C1 upward.
Geo-awareness
The drone must load geographical zone data and warn the pilot of airspace limits. Required for C1, C2, C3, C5 and C6.
Noise
C1 and C2 drones must stay within a maximum sound power level, measured in a standard test.
Low-speed mode
C2 drones need a selectable low-speed mode so customers can fly closer to people in the A2 subcategory.
Lost link
The drone must behave predictably when the command and control link is lost, such as returning home or landing.
User information
A manual and the EASA consumer information must ship with the drone, matching the class and its limitations.
Every configuration counts
Requirements apply to every configuration you sell, including payloads and accessories that change mass or behaviour.
What you’ll get
The free class requirements guide
- Requirements for each class, C0 to C6
- Remote ID and geo-awareness explained
- Noise, speed and mass limits
- Lost-link and flight termination
- The harmonised standards to use
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The technical requirements for each class, C0 to C6.
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From engineering sample to labelled product
EU Drone Port is an official Notified Body (Drone Certification Lab) for UAS classes C0 to C6.
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UAS Class Certification
EU-type examination and class identification label for your drone, from C0 to C6, by an official Notified Body (Drone Certification Lab).
- Classes C0 to C6
- Testing and technical file review
- Market access to 31 countries
- Listed with EASA
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See the steps, documents and timeline of the class identification process, from engineering sample to labelled product.
- Process overview
- Required documentation
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- Typical timeline
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FAQ
Questions about class label requirements
What are the requirements for a C1 drone?
Mainly an MTOM under 900 g or impact energy under 80 J, Remote ID, geo-awareness, a height limit and a noise limit, plus user information.
What is the difference between C2 and C3?
C2 drones are under 4 kg with a low-speed mode and can fly closer to people in A2. C3 drones can reach 25 kg and fly in A3, away from people.
Do all classes need Remote ID?
Classes C1 to C3, C5 and C6 need direct remote identification. C0 and C4 have different rules.
Which harmonised standards apply?
The EN 4709 series covers the main product requirements, Remote ID, geo-awareness and lights. Using them gives a presumption of conformity.
What are C5 and C6 drones for?
C5 supports the STS-01 standard scenario and C6 the STS-02 scenario in the specific category.
Can EU Drone Port test my drone?
Yes. EU Drone Port is an official Notified Body (Drone Certification Lab) for classes C0 to C6 and tests drones against these requirements.
Last updated: October 2026. Source: Delegated Regulation (EU) 2019/945, as amended, and the EN 4709 series.
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