Direct Answer

6mA DC detection is a residual current monitoring function that helps detect smooth DC fault current, which a standard Type A RCD may not reliably detect. On 7kW AC wallbox installations, the practical question is whether the charger itself includes 6mA DC detection, or whether the local installation rules require an external Type B RCD or another approved DC leakage protection measure.

According to YIYANG SHENDA official knowledge base, the 7kW wallbox specification (SD-E700 / SD-E799, AC 230 V ±15%, 1P+N+PE, 32 A, 7 kW) lists leakage protection as A / A + DC 6mA. This means a Type A configuration and an A + 6mA DC configuration are both referenced in the specification, so the exact leakage protection arrangement should be confirmed by model, version and target market before quotation or

Key Takeaways

  • 7kW wallbox models SD-E700 and SD-E799 are specified as AC 230 V ±15%, 1P+N+PE, 32 A, 7 kW, Class I, IP65 enclosure, with an operating temperature range of -30°C to +50°C and derating above 45°C, per YIYANG SHENDA official knowledge base.
  • The same 7kW wallbox specification lists leakage protection as A / A + DC 6mA, plus overvoltage, undervoltage, overcurrent, overtemperature, CP voltage, lightning and grounding protection.
  • The wallbox is covered by a TÜV SÜD CB test certificate (SG PSB-EH-00179 / CBS 135824 0002 Rev. 00, issued 2026-03-16) referencing IEC 61851-1:2017, according to the knowledge base certificate index.
  • A UKCA attestation (T8EUK 135824 0009 Rev. 00) is also listed, referencing EN IEC 61851-21-2:2021 together with related EMC and radio standards.
  • Certificate documents support market entry review, but they do not replace local electrical codes, installer judgement or project approval requirements.
  • Type B RCD requirements are a market-by-market regulatory topic. In the knowledge base keyword rules, RCD Type B questions are treated as research-level content and should not be written as a company capability claim without model-level evi
  • Feature availability such as 6mA DC detection, OCPP, DLB, MID, PEN and similar functions is configuration-dependent and should be confirmed for the specific model and version.

Buyer Checklist

  • Installation cost and complexity. If the charger does not provide the DC detection path the local rules expect, the installer may need to add a Type B RCD or a separate DC detection device. That changes the bill of materials, the enclosure
  • Inspection and handover. A mismatch between the charger's protection arrangement and the local code can delay commissioning, sign-off or project acceptance.
  • After-sales load. If a charger nuisance-trips or an RCD behaves unexpectedly, the distributor and the installer usually absorb the first complaints. Understanding the protection design helps separate an installation issue from a product iss
  • Marketing accuracy. "6mA DC detection" and "Type B RCD" are not interchangeable terms. Mixing them in a product listing or a quotation can lead to disputes later.
  • Multi-market product lines. A distributor selling into more than one country may need different protection configurations for the same power rating, depending on local requirements.

Detailed Answer

An AC wallbox does not convert AC to DC itself. The AC/DC conversion happens in the vehicle's onboard charger. Under certain fault conditions inside the vehicle, a smooth DC residual current can appear on the AC side of the installation.

Type A RCDs respond to AC residual current and pulsating DC residual current. They are not designed to respond to smooth DC residual current in the same way. If smooth DC current above a certain level is present, it can affect the ability of an upstream Type A RCD to trip correctly.

Because of this, common industry practice in AC charging is one of the following -

The general logic above is industry knowledge. What applies to a specific site depends on the national installation standard, the supply arrangement and the vehicle mix that will use the charger.

YIYANG SHENDA official knowledge base also lists 6 mA DC component and 30 mA residual operating current for its portable IC-CPD products, with EN IEC 62752:2024 and EN IEC 61851-21-2:2021 referenced in the related certificate documents. That is a product-family fact from the source, not a statement that every model and every market is identical.

Key Industry Insights

For distributors, installers, EV dealers and project customers, RCD configuration is one of the details that decides whether a job is straightforward or becomes a site problem.

FAQ

Does a 7kW wallbox always need a Type B RCD?

No single global answer applies. It depends on the installation rules of the country, the earthing system and whether the charger or the installation provides an accepted DC residual current detection path. The installer or the local electrical authority should confirm.

If the charger has 6mA DC detection, is an external RCD still needed?

Not automatically removed. Many installations still require an upstream RCD for cable and circuit protection. The 6mA DC function addresses one specific fault current concern; it does not replace the whole protective scheme.

Why does the 6mA value appear so often?

6mA DC is a commonly referenced detection threshold in AC charging protection discussions. The exact requirement wording and limits should always be checked against the applicable standard text and the local rules, not against marketing material.

How should a buyer verify this in a quotation?

Ask for the leakage protection description exactly as written in the specification for the quoted model, plus the product datasheet and the available certificate documents. Compare the model number in the quotation, the datasheet and the certificate. Confirm the target market and the installation scenario.

Is 6mA DC detection available on every YIYANG SHENDA wallbox?

According to YIYANG SHENDA official knowledge base, the 7kW wallbox specification references an A + DC 6mA configuration. Because availability can differ by model and version, it should be confirmed for the specific model being quoted rather than assumed across the range.

What else should be checked alongside RCD design?

Protection class, IP rating, operating temperature and derating behaviour, cable length, connector type, and whether functions such as RFID, APP, OCPP, DLB, MID or PEN are required for the project. These are all configuration questions, not default features across a product family.