[Home](/)/[Resources](/resources)/CE Compliance for Connectors Deep Dive EUCEDeep dive # CE Marking for Connectors and Adapters: The Complete Classification Deep Dive Connectors are the product category that most reliably trips up an otherwise experienced compliance team, because the correct answer to "does this need CE marking" genuinely changes based on how the exact same part is sold. This deep dive walks through the standalone-versus-component test, the voltage thresholds that decide LVD applicability, the standards that provide presumption of conformity, and where connector CE files most often fail review. Copy Link[Share on WhatsApp](https://wa.me/?text=https%3A%2F%2Fkrono-labs.com%2Fguides%2Fce-compliance-for-connectors-deep-dive) At a glance Primary directives RoHS, LVD, EMC LVD voltage band 50-1000V AC / 75-1500V DC Key standards IEC 60998, IEC 61984 Deciding question Standalone or integrated? FAQs 7 On this page * [1\. Standalone product or component: the question that decides everything](#standalone-vs-component) * [2\. The three directives that actually apply to connectors](#directive-stack) * [3\. LVD voltage thresholds and where connectors fall](#voltage-thresholds) * [4\. Connector types and their typical compliance profile](#connector-types) * [5\. IEC 60998, IEC 61984, and presumption of conformity](#standards) * [6\. USB-C, Power Delivery, and the mixed-signal edge case](#usb-power-delivery) * [7\. Common pitfalls in connector CE files](#pitfalls) * [8\. Building the Declaration of Conformity and technical file](#doc-technical-file) ## 1\. Standalone product or component: the question that decides everything The base guide on [CE compliance for connectors](/guides/ce-compliance-for-connectors) states the core rule plainly: connectors sold as standalone products need their own CE marking, while connectors integrated into equipment are covered by that equipment's certification. What that short rule hides is how often the same physical part number lives on both sides of the line at once. A connector manufacturer routinely sells the exact same M12 industrial connector two ways: bundled inside a finished sensor assembly, and separately as a replacement or spare part through a distributor catalogue. The bundled version rides on the sensor's own EMC, LVD, and RoHS assessment — no separate DoC needed. The catalogue version is placed on the market independently, by the connector manufacturer, as its own product — and needs its own Declaration of Conformity, its own technical file, and its own applicable-directive analysis. This is not a technicality. Under EU product law, each economic operator that places a product on the market is independently responsible for that product's conformity — a connector maker cannot point to a downstream customer's equipment-level CE marking as covering the standalone part they also sell. Getting this distinction wrong in either direction is the single most common root cause of connector compliance disputes: either a manufacturer over-certifies parts that never leave the factory as standalone products, wasting budget, or under-certifies a spare-parts catalogue that quietly needs its own DoC. ## 2\. The three directives that actually apply to connectors Connectors are almost never subject to every CE directive at once. In practice, three directives cover the overwhelming majority of standalone connector products, and which combination applies depends on voltage, construction, and signal type. Directive Applies when What it checks RoHS 2011/65/EU Almost always, for any standalone electrical/electronic connector Restricted substances (lead, cadmium, mercury, certain phthalates and flame retardants) in housing, contacts, plating, and insulation. LVD 2014/35/EU Rated voltage falls between 50-1000V AC or 75-1500V DC Insulation, creepage and clearance distances, mechanical strength, protection against electric shock. EMC 2014/30/EU Connector carries high-speed data, or shielding materially affects a host device's emissions/immunity Electromagnetic emissions and immunity — most relevant for shielded data connectors, less so for simple power contacts. A connector rarely needs all three at once. A low-voltage signal connector under the LVD threshold typically needs only RoHS. A shielded high-speed data connector may need RoHS and EMC but not LVD. A mains connector needs RoHS and LVD but rarely EMC on its own. ## 3\. LVD voltage thresholds and where connectors fall The Low Voltage Directive applies to electrical equipment rated between 50 and 1000 volts for alternating current and between 75 and 1500 volts for direct current. That band is the single most consequential number in connector classification, because it is a rated-voltage test, not an actual-use test. A connector datasheet that specifies a maximum rated voltage of 60V is inside LVD scope even if every real-world installation only ever pushes 24V through it — the rating, not the typical deployment, is what a market surveillance authority checks. Conversely, a connector rated for a maximum of 30V stays outside LVD scope even if a customer occasionally misuses it at higher voltage, though that misuse risk is exactly the kind of thing a manufacturer should document as an assessed and mitigated hazard in the technical file regardless. Most consumer-facing signal connectors — audio jacks, most USB variants, RJ45 Ethernet — sit comfortably under the 50V AC threshold and never trigger LVD. Mains power connectors and many industrial connectors sit well above it and need full LVD compliance. The genuinely tricky middle ground is higher-power USB-C Power Delivery connectors and certain industrial low-voltage connectors rated in the 48-60V range, where the rated voltage sits right at the boundary and deserves explicit documentation rather than an assumption either way. ## 4\. Connector types and their typical compliance profile No single rule covers every connector family. The table below maps common connector categories to their typical directive profile — treat it as a starting point for the datasheet-level analysis every specific part still needs, not a substitute for it. Connector type RoHS LVD EMC Note Mains power connectors (IEC C13/C14, Schuko, CEE 7) Yes Yes — full LVD scope Rarely — passive, no active switching Carry mains voltage directly. LVD insulation, creepage, and clearance requirements under IEC 60320/60950 or successor standards apply in full. Low-voltage signal connectors (RCA, XLR, 3.5mm jack) Yes Only if rated above LVD threshold If shielded for signal integrity, EMC often referenced anyway Almost always fall under LVD's lower bound (50V AC / 75V DC) unless the connector is rated for higher voltage in an industrial context. USB, HDMI, Ethernet (RJ45), DisplayPort Yes Rarely — most operate under 50V Yes, for high-speed data integrity and emissions USB Power Delivery variants can push into higher current/voltage profiles that warrant a closer LVD look even while staying under the 50V AC threshold. Industrial/automation connectors (M12, M8, terminal blocks) Yes Yes, if rated above threshold Sometimes, depending on end application Often rated for higher voltage and current than consumer connectors; the datasheet's rated voltage decides LVD applicability, not the typical use case. Board-to-board and internal connectors Yes Only if sold standalone above threshold No — not radiating or switching independently Sold as loose components almost always get pulled into the LVD/EMC scope of whatever equipment they end up inside, rather than being independently marked. RF and coaxial connectors (SMA, BNC, N-type) Yes No — signal-level voltage Indirectly — shielding quality affects the host device's EMC test results Rarely trigger LVD on their own, but a poorly shielded RF connector is a common root cause of a host product failing radiated emissions testing. ## 5\. IEC 60998, IEC 61984, and presumption of conformity Two harmonised standards cover most standalone connector CE work. IEC 60998 addresses low-voltage connecting devices for household and similar purposes — screw terminals, connecting devices used in domestic and light commercial wiring. IEC 61984 covers connectors more broadly, defining general safety requirements and test methods that apply across a wider range of connector constructions and voltage classes. Testing against the standard whose defined scope actually matches your connector gives presumption of conformity — the legal shortcut where meeting a harmonised standard is treated as meeting the underlying directive's essential requirements, without the manufacturer having to independently argue the case to a market surveillance authority. Using a standard that does not match your connector's actual construction or intended use does not provide that presumption, even if the test report looks thorough. Standard designations, their listed scope, and their Official Journal status change over time. Always verify the current designated version and scope of any standard before citing it in a Declaration of Conformity — a withdrawn or superseded reference is one of the most common defects found during a market surveillance review of connector documentation. ## 6\. USB-C, Power Delivery, and the mixed-signal edge case USB-C connectors deserve their own discussion because they blur every line this guide has drawn so far. A standard USB-C connector carrying only USB 2.0 data and 5V power looks like an ordinary low-voltage signal connector — RoHS applies, LVD generally does not, EMC is a live consideration because of the high-speed data lines. A USB-C connector or cable assembly built to support higher Power Delivery profiles is a different animal. Depending on the specific power profile it is rated to negotiate, the connector's rated voltage can climb well past the levels a simple USB connector would ever see, moving it closer to — or into — LVD's scope. A connector with an embedded e-marker chip also stops being a purely passive mechanical part, which is worth flagging in the technical file's classification reasoning even where it does not change the final directive list. The practical takeaway: never classify a USB-C connector or cable by category alone. Check the specific rated voltage and current for the exact part or cable assembly being placed on the market, and treat the presence of active electronics inside the connector shell as a fact that belongs in the classification record even when it does not change the outcome. ## 7\. Common pitfalls in connector CE files Step 1 ### Is it sold as a standalone product, or only integrated? A connector shipped inside finished equipment, never sold separately, is covered entirely by that equipment's own CE assessment — RED, EMC, LVD, whatever applies to the host device. The connector itself carries no independent CE mark. A connector sold on its own — as a spare part, a replacement cable end, a component to another manufacturer — needs its own conformity assessment. Step 2 ### What is its rated voltage? LVD 2014/35/EU applies to electrical equipment rated between 50 and 1000V AC or 75 and 1500V DC. A connector rated below that band is outside LVD's mandatory scope, though it can still be swept in voluntarily or by a downstream customer's contractual requirement. Rated voltage on the datasheet is the test, not the voltage the connector happens to carry in a typical installation. Step 3 ### Does it contain active components? A pure mechanical connector — pins, housing, contacts, no semiconductors — is a passive component. Passive connectors typically only trigger RoHS (restricted substances in the housing, contacts, and plating) and LVD if rated above threshold. Any connector with embedded active circuitry — a USB-C connector with an embedded e-marker chip, for instance — starts to look like electronic equipment in its own right, potentially pulling in EMC as well. Step 4 ### Does a harmonised standard exist for the exact connector type? IEC 60998 covers low-voltage connecting devices for household and similar purposes; IEC 61984 covers connectors generally, defining safety requirements and test methods. Where the connector matches a standard's defined scope, testing against it gives presumption of conformity — the manufacturer does not have to independently justify every requirement to a market surveillance authority. Beyond the classification steps above, the most frequent documentation failure is simple: a technical file that references a standard without confirming it is still current on the Official Journal, or a rated-voltage figure copied from a similar-looking part rather than pulled from the exact connector's own datasheet. Connector product lines often ship dozens of near-identical variants — pin counts, plating options, cable lengths — and it is easy for one variant's rated parameters to drift silently out of sync with the file that supposedly covers the whole range. ## 8\. Building the Declaration of Conformity and technical file A standalone connector's Declaration of Conformity follows the same structural requirements as any other CE product: manufacturer identity, a clear product description that identifies the exact part number and variant range covered, the applicable directives, the standards relied on for presumption of conformity, and a signed, dated declaration statement. For guidance on the mistakes that most often invalidate a DoC across any product category, see [CE Declaration of Conformity: common mistakes to avoid](/guides/ce-doc-common-mistakes) — the same pitfalls around outdated standard references and unclear product scope apply directly to connector documentation. The technical file behind a connector DoC should include the rated electrical parameters that drove the directive classification decision, the test reports or standard-conformance evidence for each applicable directive, and — critically for a component sold in variants — a clear statement of which specific part numbers the file actually covers. A file written loosely enough to imply coverage of an entire connector family, when only one variant was actually tested, is a common weak point that surfaces during a market surveillance review. Because most connectors use Module A self-declaration — internal production control, with no mandatory Notified Body involvement for RoHS, LVD, or EMC in the vast majority of cases — the manufacturer bears full responsibility for the accuracy of that file. There is no third-party check backstopping a rushed or copy-pasted connector technical file the way there would be for a product on a Notified-Body-mandatory route. ## Frequently asked questions ### Do connectors need CE marking if they are only sold as spare parts? Yes. A connector sold as a standalone spare part or replacement component is placed on the market independently and needs its own CE marking assessment — typically RoHS for materials, and LVD if its rated voltage sits above the directive's threshold. The fact that it was originally designed for use inside a certified piece of equipment does not exempt the standalone part. ### What about passive connectors with no rated voltage above LVD thresholds? A passive connector rated below LVD's 50V AC / 75V DC lower bound is outside LVD's mandatory scope. It still needs RoHS compliance for the materials in its housing, contacts, and any plating, since RoHS applies to electrical and electronic equipment broadly and is not voltage-gated the way LVD is. ### Are there specific harmonised standards for connectors? IEC 60998 (low-voltage connecting devices) and IEC 61984 (connectors — safety requirements and tests) are the two most commonly cited standards for standalone connector products. Testing against the standard that matches your connector's defined scope provides presumption of conformity, but the exact applicable standard depends on the connector's construction and rated parameters — verify the current designated standard before relying on it. ### Do USB, HDMI, or Ethernet connectors need CE marking? When sold as standalone products — a bare USB-C connector, an HDMI adapter cable, an RJ45 coupler — yes, they need CE marking. RoHS applies to the materials. EMC often applies because these connectors handle high-speed digital signals where shielding and construction affect emissions and immunity performance, even though the connector itself has no independent power supply or radio function. ### Does a connector integrated into a finished product need its own Declaration of Conformity? No. A connector that is only ever sold as part of a finished piece of equipment — never separately — is covered by that equipment's own Declaration of Conformity and technical file. It does not need a separate DoC. The moment the same connector part number is also sold standalone, that standalone version needs its own assessment and its own DoC. ### Can a connector manufacturer rely on the equipment manufacturer's testing instead of doing its own? Only for the integrated-only scenario. A connector manufacturer selling standalone parts cannot rely on a downstream customer's equipment-level testing to cover their own CE marking obligation — each economic operator placing a product on the market independently is responsible for that product's own conformity assessment and Declaration of Conformity. ### How does USB Power Delivery change the compliance picture for a USB-C connector? USB Power Delivery can negotiate higher voltage and current than a standard USB connection, which pushes some PD-capable connectors and cables closer to LVD's relevant range depending on the specific power profile supported. A connector or cable assembly built for the higher PD power profiles is worth an explicit LVD applicability check rather than assuming standard-USB voltage levels apply. **Disclaimer:** This page is an educational resource only and does not constitute legal or regulatory advice. Directive applicability and standard designations for connectors and adapters depend on the exact product's rated parameters and construction — verify current requirements against the applicable directive text and Official Journal standard listings, and consult qualified counsel before making certification decisions. 🇪🇺 CE Marking roadmap for your product Every standard, document, and test that applies — free, no account required. See your free roadmap[ Want an expert to take your product through 🇪🇺 CE Marking compliance for you? One consultant from Krono's compliance team takes your product from requirements to legal sale, with a fixed quote before any work starts. See compliance services](/services) Learn this properly In-depth course that teaches the full process, not just this one answer. [Start the course — $149](/courses/01-ce-marking-for-electronics-engineers)[Prefer to read? Get the book — $24.99](/books/01-ce-marking-for-electronics-engineers) Related guides * [CE Compliance for Connectors and AdaptersComplete guide to CE marking for connectors, adapters, and interconnect products.](/guides/ce-compliance-for-connectors) * [CE DoC Common Mistakes Deep DiveA deep dive into building a defensible EU Declaration of Conformity: multi-directive and multi-standard structure, version control across product revisions, translation obligations, common market surveillance findings, and DoC versus DoP distinctions.](/guides/ce-doc-common-mistakes-deep-dive) * [CE Conformity Assessment Modules Deep DiveA deep dive into all sixteen CE conformity assessment module variants — A1/A2, C1/C2, D1, E/E1, F1, G, H1 — how they chain together across design and production phases, and worked module-selection walkthroughs for RED, Machinery, and PED products.](/guides/ce-conformity-assessment-modules-deep-dive) * [CE Compliance for DisplaysCE marking guide for displays, monitors, and digital signage: applicable directives (LVD, EMC, RoHS), ErP energy efficiency req…](/guides/ce-compliance-for-displays)