Practitioners in the charging product industry operating in the Eurasian Economic Union (EAEU) market have most likely heard of “TR CU 004/2011” and “EAC certification” — either they are required to provide relevant documents during customs clearance, or they are unsure whether their products need this certification when selecting products. This article will systematically sort out the core content of TR CU 004/2011, covering basic concepts, scope of application judgment, core safety requirements, compliance procedures, as well as advanced self-inspection methods and pitfall avoidance tips.
First, Understand the Basic Concepts
Let’s start with the most core definition. TR CU 004/2011 is a mandatory safety regulation for low-voltage electrical products implemented by the Eurasian Economic Union (EAEU), with only one core goal: to ensure the safety of use of low-voltage electrical appliances and prevent safety accidents such as electric shock, fire, and mechanical injury. It does not assess product performance at all — for example, charging speed and conversion efficiency are not within its jurisdiction. For charging products, it is the core access threshold for entering the EAEU market, and products without compliance certificates cannot be legally imported or sold at all.
Let’s clarify several commonly encountered terms first to avoid confusion later:
The “TR CU” we often see is the number prefix of the unified technical regulations of the EAEU. This naming method is inherited from the original Customs Union technical regulations, and the number following it is the number of the specific regulation; 004/2011 is the special regulation for low-voltage safety.
“EAC”, the Eurasian Conformity mark, is the unified mark indicating that a product meets the requirements of relevant EAEU regulations: after a product completes the conformity assessment of all applicable technical regulations and obtains valid registration documents, it can be affixed with the EAC mark as required, and then circulate uniformly across the 5 member states without separate access certification for each country.
As for the commonly heard “DoC” and “CoC”, they are two different forms of compliance certificates: DoC stands for Declaration of Conformity, which is mostly used for ordinary charging products, and enterprises self-declare compliance based on test reports from accredited laboratories; CoC stands for Certificate of Conformity, which is for high-risk products and needs to be reviewed and issued by an officially accredited body, with stricter requirements.
The validity of this regulation covers all 5 member states of the EAEU: Russia, Kazakhstan, Belarus, Armenia, and Kyrgyzstan, and it is a mandatory requirement — non-compliant products not only cannot clear customs, but will also face penalties such as fines and recalls if found on the market.
Here we must first clarify the most common misunderstanding: many people hear “low-voltage regulation” and think it regulates low-voltage charging products like USB 5V or 20V, which is exactly the opposite. The “low voltage” in the regulation has a clear legal scope, which is not the same as what we usually call “weak current” or “USB low voltage”. To judge whether a product is applicable, we look at the rated input voltage, not the output USB voltage. Take the most common example: the 220V input mobile phone fast charger we usually use, although its output is only 5V/20V, falls within the jurisdiction of this regulation; while a separately sold 5V/20V USB-C charging cable is not within the scope of application.
Does Your Charging Product Need to Comply with This Regulation?
After understanding the basic concepts, you can quickly judge whether a charging product is applicable to this regulation. In fact, the judgment logic is very simple, with only one core indicator: the rated input voltage marked on the product nameplate, which has nothing to do with the output voltage or power.
The specific voltage boundaries are: alternating current (AC) rated voltage between 50V and 1000V, direct current (DC) rated voltage between 75V and 1500V. As long as the input voltage falls within this range, it is within the scope of application of TR CU 004/2011.
Common charging products within the scope of application include: wall-plug mobile phone chargers, USB-C PD fast chargers (all with 100-240VAC input are included), laptop power adapters, desktop wireless chargers with AC input, charging power strips with USB ports, multi-port charging stations, and separately sold European standard charging plugs with voltage conversion function.
There are also some charging-related products that do not fall under or do not need to separately comply with this regulation. We list them and explain the reasons:
First, separately sold ordinary charging cables, whose operating voltage is generally only 5-20VDC, far below the lower limit of 75VDC, so they are not within the jurisdiction. If the cable has an active electronic module, boost/buck or power conversion function, or the rated input/operating voltage marked on the nameplate reaches above AC 50V or DC 75V, it cannot be directly excluded as an ordinary USB cable, and it is necessary to re-judge whether it is applicable to 004 and other EAC regulations.
Second, car chargers, because the input of the car power supply is 12V or 24VDC, which is also below the lower limit of 75VDC, so they do not need to separately comply with the 004 regulation.
Third, special charging equipment in the medical, aerospace and other fields, which are governed by special regulations and do not apply to the ordinary low-voltage regulation.
Finally, power boards inside the whole machine that are not sold separately, such as power modules built into TVs and routers, only need to comply with the regulations together with the whole machine, and do not need separate 004 certification.
In actual operation, there will be some scenarios with blurred boundaries, and the judgment rules are also very clear:
If it is a set of charger plus charging cable, judge directly based on the input voltage of the charger, and the entire set needs to meet the requirements of the regulation.
If it is a charger with replaceable plugs, as long as the product has an AC input terminal connected to the mains, it is within the scope of application, regardless of whether the plug is replaceable.
If it is a wireless charger with a built-in battery, as long as it has an AC input port, it needs to comply with the 004 regulation; if it is a pure power bank product that only has battery output and no mains input, it shall be judged separately according to the corresponding regulations.
Many people are prone to several common pitfalls when judging the scope of application for the first time:
First misunderstanding: if the output voltage is lower than 75V, there is no need to comply. For example, if a fast charger only outputs 5V/20V, people think it is not within the scope. In fact, the judgment basis is the rated voltage on the input side, which has nothing to do with the output.
Second misunderstanding: all charging cables need 004 certification. In fact, the operating voltage of separately sold ordinary charging cables is only 5-20V, far below the lower limit of DC 75V, and is not within the jurisdiction of the regulation; only sets sold bundled with chargers need to meet the requirements together with the charger.
Third misunderstanding: the smaller the power, the less need to comply. Even a 5W slow charger, as long as the input is 220VAC, is within the scope of application, and the judgment has nothing to do with the power level.
Fourth misunderstanding: samples and small-batch cross-border e-commerce products do not need to comply. Whether it is a large shipment or a small parcel, as long as the product is imported into the EAEU territory for sale, it must meet the customs clearance requirements, and non-compliant products will still be detained and fined.
What Safety Requirements Does This Regulation Cover?
After clarifying the scope of application, you can further understand the core safety requirements of the regulation — these requirements are all set around daily use risks, and charging products mainly cover five aspects.
The first and most core requirement is electric shock protection. After all, charging products are directly connected to the mains, and the consequences of electric leakage are unimaginable. This requirement covers two scenarios: normal use and fault, and the core judgment standard is that accessible parts shall not be dangerously live; parameters such as leakage current/contact current, withstand voltage, and insulation resistance shall meet the limits of applicable safety standards; inductive electricity that does not pose a danger is allowed, but shall not exceed the specified limit. During normal use, accessible parts such as the shell, pins, and exposed metal of the USB port shall not have dangerous voltage; plug pins have clear insulation length requirements, so that even if the plug is not fully inserted into the socket, fingers cannot touch the live metal parts. Under fault conditions (such as short circuit, component damage), accessible parts such as the shell and charging port still need to meet insulation requirements, and shall not be dangerously live, so as to avoid electric shock risks from the root.
The second is temperature and fire protection requirements. Charging products will generate heat when working at full load, and the temperature shall not exceed the safety limit. The upper limit of the shell temperature of civilian products is about 70℃, and the specific value will be slightly adjusted according to the grade of insulating materials. In addition to temperature, there are also requirements for the flame retardancy of materials: the shell and internal insulating materials must be flame retardant; even if a fire occurs, it cannot continue to burn and spread, let alone drip flammable melts, to avoid secondary injury.
The third is mechanical strength requirement. Simply put, the product should be “durable”, and cannot have safety problems after being dropped or squeezed. For example, the shell and plug shall not expose internal live parts after falling or squeezing, and the pins shall not be deformed or loose; if it is a product with an integrated charging cable, the cable shall not have broken cores or exposed copper after being pulled, and the USB port shall not be loose or fall off after repeated plugging and unplugging; for foldable pins, there shall be no risk of poor contact or overheating after repeated folding.
The fourth is electrical isolation requirement. Many people may have heard of the situation of “tingling sensation from the charger head”, which is most likely due to poor electrical isolation. The 004 regulation requires that the high-voltage side of the charger connected to the mains and the low-voltage side connected to mobile phones and computers must have reliable insulation isolation to prevent the mains from directly connecting to the charging port, which is also one of the mandatory test items.
The fifth is marking and instruction manual requirements. The following information must be marked on the product body: rated voltage, power/current, model, manufacturer, and EAEU authorized representative information, which cannot only be marked on the packaging. If it is a multi-port, multi-gear fast charging product, it must also clearly mark the maximum power of a single port and the total power, and cannot use vague markings to mislead consumers, for example, the total power is 65W but only marked “65W fast charge”, making people think that each port can output 65W separately. In addition, the product instruction manual must have a Russian version (or the official language version of the corresponding member state), and must clearly mark safety precautions.
How to Achieve Compliance? Two Forms and Basic Procedures
After understanding the safety requirements, you can further clarify the compliance handling path. Under the framework of TR CU 004/2011, there are two forms of compliance certificates. Whether to use DoC or CoC shall be subject to the list of applicable products of the regulation, conformity assessment schemes, product use, and the judgment of the certification body. The following are common handling situations for charging products, organized into a table for easy comparison:
| Compliance Certificate Type | Common Applicable Products (Not an Absolute Division) | Application Requirements | Audit Strictness | Validity Period |
| DoC (Declaration of Conformity) | Ordinary consumer products: mobile phone fast chargers, laptop adapters, desktop wireless chargers, ordinary multi-port charging stations, etc. | Proposed by an authorized representative within the EAEU, self-declared based on test reports from EAEU-accredited laboratories | Relatively low (enterprises bear compliance responsibility themselves) | Up to 5 years, single-batch validity can be applied for |
| CoC (Certificate of Conformity) | High-risk products: high-power charging power strips with grounding, industrial-grade power supplies, etc. | Reviewed and issued by an EAEU officially accredited certification body, some schemes require factory inspection | Relatively high (official full-process audit) | Up to 5 years |
There is a very important prerequisite here: overseas manufacturers cannot directly apply for EAC compliance, and must designate an importer or authorized representative within the EAEU as the applicant. Moreover, this applicant is not just a simple agent, but has to bear the compliance responsibility in the market; if there is a problem with the product, the applicant shall bear the corresponding legal responsibility.
The specific handling process is actually not complicated, and simplified, it mainly has five steps:
The first step is to confirm the product classification and scope of application first, and judge whether to do DoC or CoC, so as to avoid wasting time and money by doing the wrong type.
The second step is to prepare product materials, including nameplate design, instruction manual, model list, key structure description, etc. Organizing them in advance can speed up the subsequent progress.
The third step is to send samples to an EAEU-accredited laboratory to complete safety tests. The test items are the safety requirements we mentioned earlier, and a formal test report will be obtained after passing the test.
The fourth step is to submit all materials to the relevant body for review. After passing the review, a compliance document will be issued, and it must be registered in the unified certification system of the EAEU. Only registered documents are valid.
The fifth step is to affix the EAC mark on the product, after which it can be legally imported and sold.
Understand the System: Relationship with Other Regulations and Certifications
Many practitioners who have worked in the European market confuse CE-LVD with the 004 regulation, and some people mistakenly think that completing 004 is equivalent to completing all EAC compliance. This part is advanced content, helping you sort out the division of labor of regulations within the EAC system and the differences between certifications in different markets.
First of all, there are many special technical regulations in the EAC system, each governing different aspects, and 004 is only one of them that governs low-voltage safety. There are two other common regulations related to charging products:
One is TR CU 020/2011, the electromagnetic compatibility regulation, which governs whether the product will generate electromagnetic interference that affects other electrical appliances and whether it can resist external electromagnetic interference itself, and has nothing to do with safety risks.
The other is TR EAEU 037/2016, commonly known as the RoHS regulation, which governs the restriction of hazardous substances in products, such as the content of harmful heavy metals like lead and mercury, and is also unrelated to safety performance.
For ordinary mains-input charging products, they need to meet the requirements of three regulations at the same time: 004 (safety), 020 (electromagnetic compatibility), and 037 (hazardous substances) before they can be affixed with the EAC mark, not just completing 004.
Let’s talk about the difference from CE-LVD certification. The safety goals of the two are indeed similar, both to ensure the safety of use of low-voltage electrical appliances, but they belong to two completely independent market access systems and do not recognize each other. CE test reports can be used as technical references, but cannot directly replace 004 tests and EAC compliance documents. The core differences are mainly in the following aspects: different plug standard requirements, different marking language requirements, different applicant requirements, and different certification registration systems, so never think that with CE you can directly sell to the Eurasian market.
Here are two common cognitive misunderstandings to remind everyone: the first is “having CE certification is equivalent to complying with 004”, which is wrong; compliance must be re-handled in accordance with the rules of the EAEU. The second is “only doing 004 is enough”, which is also wrong; ordinary mains products also need to be matched with compliance of other regulations such as electromagnetic compatibility and RoHS before they can be sold legally.
Compliance Self-Inspection You Can Do Yourself
If you already have products on hand and want to quickly self-check whether they meet the basic requirements of the 004 regulation, you can follow these three steps, which can be operated without professional testing knowledge.
The first step is to judge whether the product is within the scope of application. You can turn to the nameplate side of the product, find the line of parameters marked “Input” or “INPUT”, and check whether the rated input voltage falls within the range of AC 50-1000V or DC 75-1500V. For example, a common 220V input mobile phone charger is obviously within the range; while a separately sold 20V USB-C charging cable is not within the range.
The second step is to do a quick check of appearance and marking. First, look at the plug to confirm that the plug form matches the socket standard of the Eurasian market, the rated current of the product, and the electric shock protection category: small-power chargers with double insulation (Class II) usually have a two-round-pin structure; high-power power strips or adapters with protective grounding (Class I) should be checked for the grounding structure and corresponding plug form, and “round pin” cannot be used as the only judgment standard; Chinese national standard and US standard flat plugs that have not undergone standard conversion usually have risks of market adaptation and test failure. Then look at the structure: whether the USB port has electric shock protection design, and whether there are gaps in the shell large enough to expose internal live parts; then look at the marking: whether the product body is marked with rated voltage, power/current, model, manufacturer and EAEU authorized representative information, and whether there is content in Russian or the official language of the member state; if it is a multi-port fast charging product, you also need to check whether it clearly marks the maximum power of a single port and the total power, and whether there is false marking that misleads.
The third step is to verify the validity of the certification documents. First, check whether the obtained EAC certificate or declaration of conformity clearly marks the regulation number TR CU 004/2011; then check whether the product model, voltage, and power parameters on the certificate are completely consistent with the actual product; finally, you can also enter the certificate number in the unified certification database of the EAEU to query the authenticity of registration, so as to avoid getting fake certificates.
When selecting products or receiving goods daily, there are several common high-risk points that can be quickly identified:
• The plug is a Chinese national standard/US standard flat plug, without Eurasian standard conversion;
• The product is only marked in English, without Russian/member state official language content;
• If the exposed metal parts of the USB port have obvious tingling or abnormal electric leakage sensation, stop using immediately and send to an accredited laboratory for standardized tests such as leakage current, withstand voltage, and insulation resistance for confirmation; a common test pen lighting up may be inductive electricity caused by Y capacitors or parasitic capacitance, which can only indicate risk and cannot be directly used as the basis for judging whether the electric shock protection of TR CU 004/2011 is qualified;
• If the shell has no clear flame retardant grade mark, obviously softens and deforms after being heated, or has traces of ablation or molten dripping, you should focus on verifying the material flame retardant grade document and the laboratory fire test results (which need to be judged according to standard methods such as glow wire, needle flame, vertical/horizontal combustion); do not use a lighter to do destructive tests by yourself, such operations are neither safe nor can be used as the basis for compliance judgment.
Key Pitfall Avoidance Points and Change Rules
Finally, we have sorted out several common pitfall avoidance suggestions when applying for compliance, as well as situations where compliance needs to be re-evaluated, to help you avoid detours.
Four pitfall avoidance suggestions for compliance application:
First, replace the plug that meets the product’s electric shock protection category, rated current, and Eurasian market socket standard in advance: small-power double insulation (Class II) chargers usually use two-round-pin European standard plugs, and high-power products with protective grounding need to match the corresponding grounding plug. Do not send Chinese national standard or US standard plugs for testing directly, as they will most likely fail due to non-compliance with plug requirements, which will waste time instead.
Second, be sure to choose a laboratory with EAEU accreditation qualifications for testing, otherwise the test report will not be recognized, which is equivalent to doing it in vain.
Third, add Russian content to the product marking and instruction manual in advance, do not wait for the test to be completed before rectification, which is not only troublesome but also increases costs.
Fourth, the rated voltage and power parameters on the product nameplate must be marked accurately, otherwise there may be errors in the judgment of the scope of application, either the certification is done in vain, or compliance is missed.
There are also two common pitfalls in the use of the EAC mark to note: many people think that the EAC mark only needs to be pasted on the packaging, but in fact, it is not. Usually, it should be marked on the visible position of the product body and kept clear and durable; if it cannot be marked on the body due to product size or structure reasons, it should be marked on the packaging and accompanying documents in accordance with the requirements of the regulation. Some people affix the EAC mark before obtaining the formal compliance document, which is also illegal. Products that have not completed compliance must never use the EAC mark.
If the product is modified later, not all modifications require re-certification, but if the following situations are encountered, the compliance of the 004 regulation must be re-evaluated: the first is the replacement of key safety structural parts such as plugs, shells, and insulating materials; the second is the adjustment of core parameters such as the product’s rated voltage, power, and circuit design; the third is the replacement of the manufacturer or the EAEU authorized representative. These changes will affect the safety performance of the product or the subject of compliance responsibility, so they must be re-evaluated, and if necessary, re-tested and re-certified.
In general, TR CU 004/2011 is the core safety access threshold for mains-input charging products to enter the EAEU market, and the core basis for judging whether a product is applicable is the rated input voltage. In the actual compliance process, it is also necessary to simultaneously meet the requirements of supporting regulations such as electromagnetic compatibility and RoHS, and do a good job in checking the product structure, marking language, and compliance documents, which can effectively avoid risks in customs clearance and market supervision.