VILAS Requires 26.5–40 GHz SE Re-testing for Conductive Gaskets Imports to Vietnam

On May 2, 2026, the Vietnam National Institute of Metrology (VILAS) updated its EMC Import Testing Guidelines, mandating third-party shielding effectiveness (SE) re-testing in the 26.5–40 GHz band for all imported conductive gaskets. This change directly affects exporters and suppliers serving Vietnam’s 5G base station and intelligent traffic signal system supply chains — sectors where high-frequency EMI mitigation is critical.

Event Overview

Effective May 2, 2026, VILAS revised its EMC Import Testing Guidelines. The update requires that every import batch of conductive gaskets must be accompanied by a third-party shielding effectiveness (SE) test report covering the 26.5–40 GHz frequency range, conducted per Clause 7.3 of IEC 61000-4-20:2026. Previously accepted CE or UL test reports no longer qualify for exemption. The requirement applies to all incoming shipments, with no grandfathering clause stated in the published guideline.

Which Subsectors Are Affected

Direct Exporters (e.g., Chinese manufacturers shipping to Vietnam)
These enterprises are directly responsible for compliance documentation. The new rule introduces an additional mandatory testing step not previously required for market access, extending lead time and increasing certification costs. Since the 26.5–40 GHz band is specific to millimeter-wave applications, legacy SE reports — often limited to lower frequencies (e.g., 30 MHz–1.5 GHz) — are insufficient.

Contract Manufacturers & EMS Providers
Firms assembling 5G infrastructure equipment or intelligent transportation systems for Vietnamese customers may now face upstream verification demands from their clients. If conductive gaskets used in final assemblies lack valid 26.5–40 GHz SE reports, product-level EMC certification for end devices could be delayed or invalidated.

Supply Chain & Logistics Service Providers
Cargo forwarders and customs brokers handling electronics components into Vietnam must now verify inclusion of the new SE report prior to clearance. Absence of the document may trigger inspection delays at ports or require post-arrival re-testing — which is not permitted under current VILAS import rules.

What Relevant Enterprises or Practitioners Should Focus On and How to Respond

Confirm applicability before shipment

Verify whether your conductive gasket model falls under VILAS’s scope — specifically whether it is intended for use in 5G base stations or intelligent traffic signal systems in Vietnam. Non-applicable products (e.g., those destined for consumer electronics without mmWave EMI requirements) may not require this test, though official guidance does not yet clarify exclusions.

Allocate 10–14 days for third-party re-testing

The guideline explicitly states that exporters must reserve 10–14 days for the 26.5–40 GHz SE re-test. This is not optional buffer time but a minimum processing window. Schedule testing with accredited labs early — especially those with IEC 61000-4-20:2026 capability — and confirm turnaround timelines before finalizing production schedules.

Review existing CE/UL reports for frequency coverage

Do not assume prior certifications cover the new band. Most CE/UL reports for conductive gaskets cite standards such as ASTM D4935 or MIL-STD-285, which do not mandate testing above 18 GHz. Cross-check each report’s upper frequency limit; if below 26.5 GHz, re-testing is unavoidable.

Maintain version-controlled documentation for each batch

VILAS requires batch-specific SE reports. Generic type-test certificates will not suffice. Ensure your quality management system links each export lot number to its corresponding 26.5–40 GHz test report — including lab accreditation details, test setup photos (if available), and raw data traceability.

Editorial Perspective / Industry Observation

Observably, this update signals a tightening of technical gatekeeping at Vietnam’s regulatory frontier — not merely an administrative update. The explicit alignment with IEC 61000-4-20:2026 (a newly published edition) suggests VILAS is proactively synchronizing with emerging global mmWave EMC expectations, rather than reacting to noncompliance incidents. Analysis shows this is less about enforcement of existing rules and more about pre-emptive harmonization with 5G-advanced infrastructure requirements. From an industry perspective, it reflects growing differentiation in regional EMC regimes: while EU and US markets still largely rely on lower-band SE validation, Vietnam is now requiring evidence relevant to actual deployment conditions in dense urban mmWave networks. Current developments indicate this is a policy signal — not yet a fully scaled enforcement regime — but one that warrants continuous monitoring as VILAS begins implementing audits or random checks later in 2026.

Conclusion
This VILAS update marks a procedural shift in Vietnam’s import control for EMI-critical components. It does not introduce new product safety risks, nor does it ban any material or design. Rather, it raises the evidentiary bar for electromagnetic assurance in high-frequency applications. For stakeholders, it is best understood not as a temporary hurdle, but as an indicator of evolving technical expectations in Southeast Asian telecom and smart infrastructure markets — where mmWave performance validation is transitioning from optional engineering practice to mandatory regulatory evidence.

Information Source
Main source: Vietnam National Institute of Metrology (VILAS), EMC Import Testing Guidelines revision dated May 2, 2026. Note: Further implementation details — including list of accredited labs, fee structure, and possible exemptions — remain pending official publication and are under observation.