E-Mark Certification for Automotive Computers: UN ECE R10 Explained

E-mark certification is the type approval that shows a vehicle component meets the UN vehicle regulations administered by the United Nations Economic Commission for Europe (UNECE), marked with a capital E and a country number in a circle. For an in-vehicle computer, display or telematics gateway, the regulation that matters is UN Regulation No. 10 on electromagnetic compatibility, usually written UN ECE R10, which sets how much interference the equipment may emit and how much it must tolerate on a vehicle’s electrical system.

As vehicles carry more computing, from fleet telematics and driver displays to camera recorders and edge AI for driver assistance, the E-mark has become the normal entry ticket for equipment fitted to road vehicles in Europe and the many other countries that apply the UN regulations. It is a regulatory approval for EMC, not a general quality mark and not a ruggedness rating, and knowing what it does and does not cover makes it much easier to read a datasheet.

This guide explains what the E-mark is, how it differs from the lower-case e-mark and from CE, how to read the country code and approval number, what UN ECE R10 tests for computers, how ISO 7637-2 and ISO 16750-2 fit in, when an in-vehicle computer needs one, the USA rules on where its screen may go, how approval is obtained, and the ignition and power features that go with it on our rugged in-vehicle PCs.

Several marks appear on vehicle electronics, and they are easy to confuse. The table sets out what each means and where it applies.

Many in-vehicle computers carry all of these, because they are sold for vehicles, depots and offices alike. The E-mark is the one that relates to installation in a road vehicle. Our explainer on EMC testing covers the general method behind all of them.

The two marks look alike but rest on different law. The E-mark, with a capital E in a circle, comes from the UNECE’s 1958 Agreement on vehicle regulations, which has contracting parties across Europe, Asia, Africa and Oceania. An approval granted by one party is recognized by all the others that apply the same regulation. The e-mark, with a lower-case e in a rectangle, comes from European Union type-approval law and applies in EU and EEA countries.

For EMC the two have largely converged. The EU now applies UN R10 directly through its General Safety Regulation, so most new EMC approvals for vehicle electronics are E-marks to R10. Older equipment, and approvals under the former Automotive EMC Directive 2004/104/EC, may still show an e-mark. In practice a buyer in Europe can accept either, but should check the regulation and series named in the approval.

An E-mark label carries more than the circle. A typical R10 approval mark on an electronic sub-assembly reads something like “E24 10R-06 1234”, followed or accompanied by the approval details on the certificate. Each part has a meaning.

The example is illustrative; the layout varies slightly between authorities and approvals. The approval number is the useful part when you check a product, because it links to the certificate and the exact models covered. Ask for the certificate rather than relying on a logo on a datasheet.

Every contracting party to the 1958 Agreement that applies UN R10 accepts an R10 E-mark, whichever country issued it. Each party also has a number that identifies it as the approving authority. The table lists the codes most often seen on vehicle electronics.

Lower-case e-marks use the same numbers for EU member states, so e13 is also Luxembourg and e24 is also Ireland. The United Kingdom remains a party to the 1958 Agreement and its Vehicle Certification Agency continues to issue E11 approvals. Contracting parties choose which regulations they apply, so for markets outside Europe confirm that R10 is applied before relying on an E-mark alone.

E13 means the approval was granted by the authority of Luxembourg. It does not mean the product is only for Luxembourg, or that it was made or tested there. Manufacturers choose an approval authority and technical service for practical reasons, such as experience, language and lead time, and some authorities, Luxembourg (E13) and Ireland (E24) among them, approve a large share of electronic sub-assemblies. DFI and Axiomtek, for example, list E24 approvals on several of the in-vehicle computers we supply.

Whichever number appears, the approval is valid in all parties applying the regulation. What matters is the regulation and series, the models named on the certificate and whether the configuration you buy matches them.

UN Regulation No. 10 sets uniform provisions for the electromagnetic compatibility of vehicles and of electrical and electronic sub-assemblies (ESAs) intended to be fitted to them. A computer, display or gateway installed in a vehicle is an ESA. R10 has been revised several times; the 06 series of amendments is the current one at the time of writing, and it added requirements for vehicles that connect to the mains for charging.

R10 distinguishes immunity-related functions, those that affect the driver’s direct control of the vehicle, the protection of occupants or other road users, or the operation of required equipment. ESAs that perform such functions face the full immunity requirements; others may have a lighter route. Most in-vehicle computers are approved to the full set regardless, so the approval does not limit how the computer is used later.

ISO 7637-2 is the international standard for electrical transient conduction along supply lines in road vehicles. It defines test pulses that reproduce what happens on a vehicle’s 12 V or 24 V supply when loads are switched, and R10 calls on it for the transient tests. The pulse names appear on many datasheets.

Earlier editions also included pulse 4 for engine cranking and pulse 5 for load dump; those now sit in ISO 16750-2. ISO 7637-3 covers transients coupled onto signal and data lines rather than the supply. A computer marked with ISO 7637-2 protection, such as the Axiomtek UST200-83H-FL series, has an input stage designed to absorb these pulses without resetting.

E-mark testing sits among several automotive and rugged standards that are often quoted together. Only R10 confers the E-mark; the others answer different questions about the same computer.

A computer intended for buses and trucks in Europe typically carries the E-mark, ISO 7637-2 protection and an ISO 16750-2-style power design. One that also goes on trains adds EN 50121-3-2, covered in our guide to the EN 50155 rolling stock standard, and one for military vehicles adds MIL-STD-1275.

Because the E-mark appears on rugged vehicle computers, it is sometimes read as proof that a computer will survive vibration, shock, heat or water. It is not. R10 is an EMC regulation, and an E-marked computer may or may not have been tested for anything else.

Our explainers on MIL-STD-810H and the IP rating chart cover the other columns, and our guide to what makes a computer rugged brings them together.

For electronics fitted to road vehicles in E-mark markets, it is usually required in practice and often required in law. Vehicle manufacturers need approved sub-assemblies for their own type approval, and bodybuilders, fleet operators and public transport authorities write the E-mark into their specifications. Under R10, an aftermarket sub-assembly with no immunity-related function can in some cases be placed on the market under the general EMC rules instead, but most buyers ask for the E-mark anyway because it settles the question.

If in doubt, ask the vehicle builder or the approving authority for the project. Where a computer has no E-mark, the fallback is usually a test to R10 at an accredited laboratory with the vehicle in question, which costs more and takes longer than buying an approved model.

An E-mark settles whether a computer is electromagnetically fit for a vehicle. Where its screen may go, and what it may show while the vehicle moves, is a separate question for road traffic law. These are the main rules in Great Britain, summarised for orientation rather than as legal advice, so check the current text and your own fleet policy before a build is signed off.

The same principles run through European guidance on in-vehicle information systems, which asks that screens sit close to the driver’s line of sight and work in short glances. Emergency services set their own policies on what crews may use on the move, and the passenger seat is often where the full application runs. Our explainers on the mobile data terminal and the RAM mount cover how cab terminals are used and fitted.

An E-mark proves the computer behaves electromagnetically on a vehicle. The power design decides whether it keeps running and shuts down cleanly. These are the features we look for in every in-vehicle computer, alongside the approval.

Ignition settings are usually adjustable, with PC or car modes and delay switches, so we set them for the vehicle and the software before the computer ships. Our guide to configuring ignition control covers the options, and CAN bus explains the vehicle network.

E-marked computers appear across commercial, public and emergency fleets. These are the uses we supply most often, with the features that usually decide the choice.

Our case studies show several of these in service: 5G in-vehicle computers for a connected ambulance fleet, bin detection on a refuse collection vehicle, rugged vehicle mount computers for a towing fleet and remote vehicle teleoperation over 5G. Fleet telematics explains the data most of these systems collect.

We work with manufacturers whose in-vehicle computers are E-marked for trucks, buses, emergency vehicles and specialist fleets. As your system integrator we configure each computer for the vehicle, image the operating system and application, set the ignition behavior and test it before it ships. The approval belongs to the manufacturer, so we supply the approval details for your vehicle file and confirm that the model and configuration you order are covered.

As a recent example, the Sintrones VBOX-3631 in-vehicle edge AI computer is designed to meet E-Mark and EN 50155.

Premio’s vehicle-ready systems are another example. The ACO-6000-CML fanless in-vehicle computers list E-Mark alongside EMC conformity with EN 50121-3-2, and the JCO-6000-ORN rugged edge AI computers, built on NVIDIA Jetson AGX Orin for robots and vehicles, carry E-Mark with ignition management and a 9 to 48 V DC input. As with any vehicle computer, check the E-Mark approval number for the exact model before it is fitted.